AS2525F

AS2525_1 AMSCO | Alldatasheet

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Revision 2.1 Page 1 of 27 austria microsystems Key Features - Line/speech handsfree circuit, LD/MF repertory dialler, and tone ringer on one 44 pin CMOS chip - Operating range from 15 to 100 mA line current (down to 5 mA with slightly reduced performance) - All significant parameters programmable with external EEPROM - Volume control of receiver signal - Handsfree function with enhanced voice switching - Low noise (max. -72 dBmp) - Unique EMC performance - LD/MF switchable dialing with temporary MF mode - Repertory dialing with last number redial and memory dialing (8 x 2 direct and 12 indirect) - Call restriction with PIN code - Serial interface for EEPROM and LCD driver - 2-tone/3-tone ringer with ring frequency detection Package Available in 44 pin TQFP. General Description The AS2525 is a CMOS mixed-mode integrated circuit for use in feature phones, answering machines and fax machines. It contains an analogue line interface and speech circuit for a/b terminals, loudhearing, handsfree, enhanced LD/MF dialler, tone ringer with dc/dc converter and serial interface to EEPROM and LCD-driver (AS2591), all in a 44 pin package. The circuit is fully line powered. The AS2525 uses an external EEPROM for a 32 digit last number redial storage and memories for 28 numbers each containing up to 24 digits/data. The device provides a volume control for the earpiece and the loudspeaker. The volume can be controlled by pressing the [V-]/[V+] keys. The versatility of the circuit is provided by programming all parameters through an external EEPROM. This allows easy adaptation to various PTT requirements worldwide. Block Diagram CS SS LI VPP LS + – VSS 30 Ω RI STB 300 Ω ZBAL AGND VDD VDD VDD VPP VPP LO1 LO2 VSSA RECI RECV RO NOISE DET. LINE SENSE PEAK DET. VOICE SWITCHING PEAK DET. DTMF MELODYDEBOUNCE CPU DIALLER DC/DC CONVERTEROSCILLATORKEYSCANNING CMKEYBOARD (C1-4/R1-3) HS HF DM/HM FCI DPN LED DI DO CLK CS1 CS2 VSS CI SUPPLY VREF VDD AGND AGND FT2 CBN FT1 AS2525 3.58 MHz Single-Chip Handsfree Phone CMOS Integrated Circuit AS2525 DATA SHEET

Datasheet AS2525 austria micro systems Revision 2.1 Page 2 of 27 Pin Description Pin # Symbol Type Description 1C S 2D O Chip Select 2 Chip select signal for external LCD driver circuit or 2 mA LED If signal is not activated, a pull down resistor (100 k Ω ) is inserted. 2D P nD O Dial Pulse Output Digital output that holds the line during off-hook operation or pulls low during break periods of pulse dialing and flash. 3H F D I Hands Free Switch Input This is a Schmitt-trigger input that is pulled high to enable handsfree operation. 4H S D I Hand Set Switch Input This is a Schmitt-trigger input that is pulled high by the hook switch to enable handset or headset operation. 5 FT1 AI Analogue input pin for connecting a capacitor for offset cancellation. 6 FT2 AI Analogue input pin for connecting a capacitor for offset cancellation. 7M 4 A I Microphone Input 4 Differential input for the handsfree microphone (electret). 8M 2 A I Microphone Input 2 Differential input for the handset microphone (electret). 9M 3 A I Microphone Input 3 Differential input for the handsfree microphone (electret).

10 M1 AI Microphone Input 1

Differential input for the handset microphone (electret).

11 STB AI Side Tone Balance Input

Analogue input for side tone cancellation network.

12 CS AO Current Shunt Control Output

N-channel open drain output to control the external high power shunt transistor for synthesizing ac- and dc-impedance, modulation of line voltage and shorting the line during make periods of pulse dialing.

13 V SS Supply Voltage Source Source

Negative Power Supply.

14 LI AI Line Input

Analogue input used for power extraction and line current sensing.

15 RI AI Receive Input

Analogue input for ac-separated receive signal.

16 SS AO Supply Source Control Output

N-channel open drain output to control the external high power source transistor for supplying (Vpp) the loudspeaker amplifier in off-hook loudspeaking/handsfree mode.

17 LS AI Line Current Sense Input

Analogue input for sensing the line current.

18 CI AI Complex Impedance Input

Analogue input pin for the capacitor to program a complex impedance.

Datasheet AS2525 austria micro systems Revision 2.1 Page 3 of 27 Pin # Symbol Type Description

19 RECI AI REC eive Input

Analogue input for the handsfree receive path. Should be connected to RO via a coupling capacitor.

20 RECV AI REC eive Voice Switching Input

Analogue input for receive voice switching path.

21 RO AO Receive Output to Handset

Output for driving a dynamic earpiece with an impedance from 150 Ω to 300 Ω .

22 V DD Supply Voltage Drain Drain

Positive Power Supply.

23 A GND Supply Analogue Grou nd

Special ground for the internal amplifiers. 24 CBN AI Analogue input pin for connecting a capacitor for background noise monitoring.

25 CM DO Converter Make Output

This is an output for controlling the external switching converter. During ringing it converts the ring signal into a 4V supply voltage.

26 V PP Supply Loudspeaker Power Supply

High power supply for the output driver stage. LO1 LO2 AO Loudspeaker Outputs 1/2 Output pins for a 32 Ω ( 25 to 50 Ω ) loudspeaker. 29 V SSA Supply Power supply pin for LO1-LO2 output amplifier.

30 DM/HM DI Dial Mode/ Headset Mode Switch Input

Digital input for choosing between LD and MF dialing or choosing handset and headset mode. See “Table 3: Parameter settings” for further details. This pin is scanned after manual off-hook only.

31 FCI DI Frequency Comparator Input

This is a Schmitt-trigger input for ring frequency discrimination. Disabled during off-hook.

32 LED DO LED Output

Digital output for connecting 2 mA LED to indicate handsfree mode.

33 OSC Osc illator Input

Input for ceramic resonator 3.58 MHz. DI/O Keyboard Rows (see Figure 1: Keyboard Layout). DI/O Keyboard Columns (see Figure 1: Keyboard Layout).

41 CLK DO Clock

Clock output for 3-wire bus. If signal is not activated, a pull down resistor (100 k Ω ) is inserted.

42 DI DI Data Input

Data input of 3-wire bus. If signal is not activated, a pull down resistor (100 k Ω ) is inserted.

Datasheet AS2525 austria micro systems Revision 2.1 Page 4 of 27 Pin # Symbol Type Description

43 DO DO Data Output

Data output of 3-wire bus. A 100 k Ω resistor connected from this pin to VSS enables key locking. If signal is not activated, a pull down resistor (100 k Ω ) is inserted.

44 CS1 DO Chip Select 1

Chip select signal for external EEPROM. If signal is not activated, a pull down resistor (100 k Ω ) is inserted. DI: Digital Input DO: Digital Output DI/O: Digital Input/Output AI: Analogue Input AO: Analogue Output AI/O: Analogue Input/output Basic Definitions Password is set to 0123 and is used to access basic parameter settings (see Table 3: Parameter settings). The set-up programming is normally done in the factory during manufacturing of the telephone sets. The factory settings can be loaded into the EEPROM (see Figure 3: Memory allocation for external EEPROM). PIN code is default set to 1111 and is used by the user to protect certain user settings (see Table 5: User programming with PIN code). The PIN code can be changed by the user. Default settings are shown in bold . Program procedures are entered with the [PG] key. Pressing any invalid key or going on-hook during programming will abort the program mode and no changes will be stored. Ending a program procedure by pressing the [PG] key will store the changes and exit the program mode. Keyboard Layout C4C3C2C1 2 0 ∗∗∗∗ MR R/P FL PG M1 M2 M3 M4 SH MT Figure 1: Keyboard Layout Maximum R ON for key closure: 1 k Ω Minimum R OFF for open key: 1 M Ω See “Table 1: Key definitions” for description of key functions

Datasheet AS2525 austria micro systems Revision 2.1 Page 5 of 27 Key Definitions and Procedures Table 1: Key definitions Key Condition Function Remark [0] - [9], [#], [ ∗] Off-hook Digits Function depending on mode [∗] LD mode Temporary MF select Providing mixed mode dialing (default LD selected) Speech mode Enter program state To enter the program state [PG] Program mode Exit program state To terminate/exit program state Speech mode Enter mute state To enter mute state Mute state Exit mute state To terminate/exit mute state[MT] Program mode Enter blank To enter blank digit during programming Redial/Pause Allows re-signaling of the last dialed number and insertion of pauses[R/P] Program state Pause Each key pressure inserts a pause [FL] Flash function Invokes a timed loop break [V+] Speech mode Volume control To increase the receive gain [V-] Speech mode Volume control To increase or decrease the receive gain [MR] Memory redial key To access memory by key codes [M1] - [M8] Memory dial Access keys to memories 1 to 8 and 9 to 16 [SH] Second function (shift) To access second function of keys Table 2: Digits Digit Key DTMF Mode (fLOW + f HIGH ) Pulse Mode Programming Mode ([PG] + Digit) Memory Location ([MR] + Digit) [0] 941 + 1336 Hz 10 pulses Memory 17 [1] 697 + 1209 Hz 1 pulse To enter PIN protected programming Memory 18 [2] 697 + 1336 Hz 2 pulses Select flash duration Memory 19 [3] 697 + 1477 Hz 3 pulses Select dialing mode Memory 20 [4] 770 + 1209 Hz 4 pulses Select pause duration Memory 21 [5] 770 + 1336 Hz 5 pulses Key lock toggle Memory 22 [6] 770 + 1477 Hz 6 pulses Ringer volume Memory 23 [7] 852 + 1209 Hz 7 pulses Ringer melody Memory 24 [8] 852 + 1336 Hz 8 pulses LCD contrast Memory 25 [9] 852 + 1477 Hz 9 pulses Ringer on/off Memory 26 [∗] 941 + 1209 Hz Temporary MF select -

Datasheet AS2525 austria micro systems Revision 2.1 Page 6 of 27 Table 3: Parameter settings Parameter Symbol Procedure: [PG] + [0] + (Password) + Default Options Inter-Digit Pause (LD) IDP [∗] + [1] + [HEX code] 840 ms 1.72 ms … 7.03 sec. (see Table 4) MF Tone Duration TD [∗] + [2] + [HEX code] 82 ms 1.72 ms … 7.03 sec. (see Table 4) MF Inter-Tone Pause ITP [∗] + [3] + [HEX code] 82 ms 1.72 ms … 7.03 sec. (see Table 4) Flash 1 Duration FL1 [∗] + [4] + [HEX code] 101 ms 1.72 ms … 7.03 sec. (see Table 4) Flash 2 Duration FL2 [∗] + [5] + [HEX code] 285 ms 1.72 ms … 7.03 sec. (see Table 4) Pause 1 Duration P1 [∗] + [6] + [HEX code] 1 second 1.72 ms … 7.03 sec. (see Table 4) Pause 2 Duration P2 [∗] + [7] + [HEX code] 3 seconds 1.72 ms … 7.03 sec. (see Table 4) Pre-Digit Pause (LD) PDP [∗] + [8] + [HEX code] 33 ms 1.72 ms … 7.03 sec. (see Table 4) Post Flash Pause PFP [∗] + [9] + [HEX code] 274 ms 1.72 ms … 7.03 sec. (see Table 4) Tx Gain, Handset A TX-HS [0] + [1] + [HEX code] 37 dB 30 to 45 dB (see Table 8) Rx Gain, Handset A RX-HS [0] + [2] + [HEX code] 1 dB -6 to 9 dB (see Table 12) Tx Gain, Handsfree A TX-HF [0] + [3] + [HEX code] 46 dB 39 to 54 dB (see Table 10) Rx Gain, Loudspeaker A RX-HS [0] + [4] + [HEX code] 29 dB 22 to 37 dB (see Table 14) Line Loss Compensation LLC [0] + [5] + [0] = off [1] = range 1: I LINE = 20 - 50 mA [2] = range 2: I LINE = 45 - 75 mA DTMF Level (Low Group) V MF [0] + [6] + [HEX code] -6 dBm -18 to -6 dBm in 1 dB steps (see Table 24) Tx Gain, Headset A TX-HEAD [0] + [7] + [HEX code] 37 dB 30 to 45 dB (see Table 20) Rx Gain, Headset A RX-HEAD [0] + [8] + [HEX code] 1 dB -6 to 9 dB (see Table 21 ) MF Comfort Tone, RO V MF-CT/RO [0] + [9] + [HEX code] -30 dBr -36 to -18 dBr in 6 dB steps (see Table 30) MF Comfort Tone, LO1/2 V MF-CT/LO [0] + [0] + [HEX code] -9 dBr -15 to 3 dBr in 6 dB steps (see Table 30) Make/Break Ratio (LD) M/B [#] + [1] + [1] = 2 : 3 [0] = 1 : 2 Dial Rate (LD) DR [#] + [2] + [0] = 10 pps [1] = 20 pps DC Mask (LI Voltage) V LI [#] + [3] + [1] = 4.5 Volt [0] = 3.5 Volt Tx Soft Clip (Handset) [#] + [4] + [1] = on (2 V PEAK ) [0] = off Rx Soft Clip (Handset) [#] + [5] + [1] = on (1 V PEAK ) [0] = off Noise Monitoring (HF) [#] + [6] + [1] = on [0] = off Loudhearing Mode [#] + [7] + [1] = HF only [0] = LH and HF modes available Ringer Melody [#] + [8] + [1] = 3-Tone [0] = 2-Tone Key-in Tone (Beep) KT [#] + [9] + [1] = on [0] = off Reset PIN Code [#] + [0] + [1] = 1111 Selected by user

Datasheet AS2525 austria micro systems Revision 2.1 Page 7 of 27 Parameter Symbol Procedure: [PG] + [0] + (Password) + Default Options Flash 1 During LD [#] + [ ∗] + [1] = on [0] = off Flash 2 During LD [#] + [#] + [0] = off [1] = on Extended LCD Symbols [9] + [1] + [0] = off [1] = on Tx Soft Clip, Handsfree [9] + [2] + [1] = on [0] = off Rx Soft Clip, Handsfree [9] + [3] + [1] = on [0] = off Voice Switching, Speed [9] + [4] + [1] = x 2 [0]=x1 (slow); [2]=x4; [3]=x8 (fast) Handset/Headset Volume [9] + [5] + [1] = reset by on/off-hook [0] = setting is maintained LCD Test [9] + [6] Turns on all segments, pressing any further key turns on all digits “1” and all symbols off. Temporary MF by * with tone Key Lock Function [9] + [8] + [1] = available [0] = not available Pin Select “DM/HM” DM/HM [9] + [9] + [1] = MF/LD [0] = Handset/Headset Ringer Off Function [9] + [0] + [1] = available [0] = not available Key Test [9] + [ ∗] + Any key pressure turns the LED on Volume Control on Handset [9] + [#] + [1] = enabled [0] = disabled The above parameters are programmable using a password (0123) through external EEPROM. All procedures must be terminated by pressing the [PG] key. Software for factory settings is available on request. The programming of timings is done by using a HEX data code as follows: C4C3C2C1 2 0 A (M1) B (M2) C (M3) D (M4) E (M5) F (M6) Figure 2: Keys for HEX-code entry Data = 4096 - (f OSC / (512 * 12) * T (T = Time; f OSC = 3.58 MHz) Table 4: Timing selection by HEX code Parameter Default HEX Binary Data Inter-digit pause 840 ms E17 1111 0001 0111 Tone duration 82 ms FD0 1111 1101 0000 Inter-tone pause 82 ms FD0 1111 1101 0000 Flash 1 101 ms FC4 1111 1100 0100 Flash 2 285 ms F5A 1111 0101 1010 Pause 1 1 sec DB9 1101 1011 1001 Pause 2 3 sec 92C 1001 0010 1100 Pre-digit pause 33 ms FED 1111 1110 1101 Post-flash pause 274 F60 1111 0110 0000

Datasheet AS2525 austria micro systems Revision 2.1 Page 8 of 27 Table 5: User programming with PIN code Function Symbol Procedure Options Call Restriction 1 CR1 [PG] + [1] + (PIN) + [ ∗] + [1] + Key in two digits, use [MT] for blank Call Restriction 2 CR2 [PG] + [1] + (PIN) + [ ∗] + [2] + Key in two digits, use [MT] for blank Key Lock [PG] + [1] + (PIN) + [#] + [6] + [0] = unlocked and [1] = locked Clear All Memories [PG] + [1] + (PIN) + [#] + [7] + Press [1] to clear Reset To Factory Settings [PG] + [1] + (PIN) + [#] + [8] + Press [1] to reset Change PIN Code PIN [PG] + [1] + (PIN) + [0] + Key in new PIN + new PIN Press [PG] to store setting and terminate procedure Table 6: Mode programming Function Symbol Procedure Options Select Flash FL [PG] + [2] + [0] = Flash 1 and [1] = Flash 2 Select Dialing Mode 1 DM [PG] + [3] + [0] = LD (pulse) and [1] = MF (DTMF) Select Pause Time P [PG] + [4] + [0] = Pause 1 and [1] = Pause 2 Easy Key Lock 2 [PG] + [5] + [3] + [9] Toggles between locked and unlocked Ringer Volume [PG] + [6] + [1] = -16 dB, [2] = -7 dB, and [3] = 0 dB (maximum) Ringer Melody [PG] + [7] + [0] , [1], [2], [3], or [4] LCD Contrast V 33 [PG] + [8] + [1] , [2], or [3] (see also AS2591 data sheet) Bell On/Off [PG] + [9] + [0] = Off and [1] = On Press [PG] to store setting and terminate procedure

1 Only when DM/HM pin is set to HM

2 Also selectable with jumper (see application note AN525)

Datasheet AS2525 austria micro systems Revision 2.1 Page 10 of 27 Side-Tone A good side-tone cancellation can be achieved by using the following equation: ZBAL /ZLINE = 10 This is assuming that the side-tone reference resistor, R2 (between LI and STB) is 300 Ω and R1 is 30 Ω . ZLINE R1 = 30 ohm R2 = 300 ohmZBAL Figure 5: Side-tone balance Transmit Path The gain of the M1/M2 —> LS path is default set to 37 dB. This gain can be changed from 30 dB to 45 dB in 1 dB steps by set-up programming. Table 8: Handset Tx gain setting [PG] + [0] + (Password) + [0] + [1] + (x) + [PG] Key (x) Tx Gain (dB) M1/2 to LS Key (x) Tx Gain (dB) M1/2 to LS [0] 30 [8] 38 [1] 31 [9] 39 [2) 32 [M1] 40 [3] 33 [M2] 41 [4] 34 [M3] 42 [5] 35 [M4] 43 [6] 36 [M5] 44 [7] 37 [M6] 45 The input is differential with an impedance of 10 k Ω . The soft clip circuit limits the output voltage swing at pin LS to 2 V PEAK when activated. Table 9: Handset Tx soft clipping selection [PG] + [0] + (Password) + [#] + [4] + (digit) + [PG] Digit Handset Tx Soft Clipping [0] Disabled [1] Enabled (2 V PEAK ) There is optional LLC for this path. The gain of the M3/M4 —> LS path is default set to 46 dB. This gain can be changed from 39 dB to 54 dB in 1 dB steps by set-up programming. Table 10: Handsfree Tx gain setting [PG] + [0] + (Password) + [0] + [3] + (x) + [PG] Key (x) Tx Gain (dB) M3/4 to LS Key (x) Tx Gain (dB) M3/4 to LS [0] 39 [8] 47 [1] 40 [9] 48 [2] 41 [M1] 49 [3] 42 [M2] 50 [4] 43 [M3] 51 [5] 44 [M4] 52 [6] 45 [M5] 53 [7] 46 [M6] 54 The input is differential with an impedance of 10 k Ω . The soft clip circuit limits the output voltage swing at pin LS to 2 V PEAK when activated . Table 11: Handsfree Tx soft clipping selection [PG] + [0] + (Password) + [9] + [2] + (digit) + [PG] Digit Handsfree Tx Soft Clipping [0] Disabled [1] Enabled (2 V PEAK ) There is no LLC option for this path. Receive Path The gain of the LS —> RO receive path is default set to 1 dB. This gain can be changed from -6 dB to 9 dB in 1 dB steps by set-up programming. Table 12: Handset Rx gain setting [PG] + [0] + (Password) + [0] + [2] + (x) + [PG] Key (x) Rx Gain (dB) LS to RO Key (x) Rx Gain (dB) LS to RO [0] -6 [8] 2 [1] -5 [9] 3 [2] -4 [M1] 4 [3] -3 [M2] 5 [4] -2 [M3] 6 [5] -1 [M4] 7 [6] 0 [M5] 8 [7] 1 [M6] 9 When the handset volume control is enabled (see Table 3: Parameter settings), the user can also change the gain within this range in 4 dB steps via the [V+]/[V-] keys. The default receive gain in handset and headset mode must lie between position 5 and 9 for correct operation of the volume control. The receive input is the differential signal of RI and STB. The soft clip circuit limits the output voltage at RO to 1 V PEAK . It prevents harsh distortion and acoustic shock.

Datasheet AS2525 austria micro systems Revision 2.1 Page 11 of 27 Table 13: Handset Rx soft clipping selection [PG] + [0] + (Password) + [#] + [5] + (digit) + [PG] Digit Handset Rx Soft Clipping (Earpiece) [0] Disabled [1] Enabled There is LLC option for this path. The gain of the LS —> LO1/LO2 receive path is set to 29 dB. This gain can be changed by set-up programming from 22 dB to -37 dB in 1 dB steps. Table 14: Loudspeaker gain setting [PG] + [0] + (Password) + [0] + [4] + (x) + [PG] Key (x) Rx Gain (dB) LS to LO1/2 Key (x) Rx Gain (dB) LS to LO1/2 [0] 22 [8] 30 [1] 23 [9] 31 [2] 24 [M1] 32 [3] 25 [M2] 33 [4] 26 [M3] 34 [5] 27 [M4] 35 [6] 28 [M5] 36 [7] 29 [M6] 37 The user can also change the gain using the [V+]/[V-] keys (see section "Handsfree"). The volume range is 20 dB (8 steps, each 2.5 dB). The receive input is the differential signal of RI and STB. The soft clip circuit limits the output voltage swing at LO1/LO2 to 1 V PEAK . Table 15: Loudspeaker soft clipping selection [PG] + [0] + (Password) + [9] + [3] + (digit) + [PG ] Digit Handsfree Rx Soft Clipping (Loudspeaker) [0] Disabled [1] Enabled There is optional LLC for this path. Line Loss Compensation (LLC) The line loss compensation is set-up programmable and effects only the handset mode. Table 16: Line loss compensation selection [PG] + [0] + (Password) + [0] + [5] + (digit) + [PG] Digit LLC Range [0] No LLC (gain independent of line current) [1] -1 dB/5 mA from 20 to 50 mA [2] -1 dB/5 mA from 45 to 75 mA When it is activated, the transmit and receive gains for both channels are decreased by 6 dB at line currents from 20 mA to 50 mA or from 45 mA to 75 mA depending on selected range. Handsfree The handsfree function allows voice communication without using the handset (full 2-way speaker phone). Two voice controlled attenuators prevent acoustic coupling between the loudspeaker and the handsfree microphone. The voice switching circuit has three states, namely idle, transmit or receive. In receive mode the attenuation of the receive path and the transmit path can be controlled by the volume keys between 0 dB and -20 dB. The following table (Table 18: Handsfree attenuation scheme) shows how voice switching is controlled. TX_atten Backgnd noise monitor Voice switching speech RX voice switching circuit Figure 6: Handsfree voice switching A background monitoring circuit is incorporated. This circuit can be enabled/disabled as required . Table 17: Background noise monitoring selection [PG] + [0] + (Password) + [#] + [6] + (digit) + [PG] Digit Background Noise Monitoring [0] Disabled [1] Enabled

Datasheet AS2525 austria micro systems Revision 2.1 Page 13 of 27 Loudhearing A loudhearing mode can be enabled/disabled through the set-up programming. Table 19: Loudhearing mode selection [PG] + [0] + (Password) + [#] + [7] + (digit) + [PG ] Digit Loudhearing [0] Enabled (LH + HF provided) [1] Disabled (only HF is provided) Headset mode Head set mode is selected by connecting pin "HEAD" to VDD and enabling the head function by service code programming (see also Table 3: Parameter settings). Table 20: Headset Tx gain setting [PG] + [0] + (Password) + [0] + [7] + (x) + [PG] Key (x) Tx Gain (dB) M1/2 to LS Key (x) Tx Gain (dB) M1/2 to LS [0] 30 [8] 38 [1] 31 [9] 39 [2] 32 [M1] 40 [3] 33 [M2] 41 [4] 34 [M3] 42 [5] 35 [M4] 43 [6] 36 [M5] 44 [7] 37 [M6] 45 Table 21: Headset Rx gain setting [PG] + [0] + (Password) + [0] + [8] + (x) + [PG] Key (x) Rx Gain (dB) LS to RO Key (x) Rx Gain (dB) LS to RO [0] -6 [8] 2 [1] -5 [9] 3 [2] -4 [M1] 4 [3] -3 [M2] 5 [4] -2 [M3] 6 [5] -1 [M4] 7 [6] 0 [M5] 8 [7] 1 [M6] 9 If this mode is entered both hook inputs HS and HF act as electronic off-hook for handset operation. The gain in transmit and receive can be programmed by service code programming. The pin "HEAD" is only scanned once after off-hook and any change on this pin during one session will be ignored. Ring Frequency Detection The ring frequency detector assures that only signals with a frequency between 13 Hz and 70 Hz are regarded as valid ring signals. When a valid ring signal is present for 100 ms continuously, the melody generator is activated and remains active as long as the ring signal is present. Once the melody generator has been started, the ring signal is continuously monitored and the melody generator is instantly turned on or off according to the momentary presence of a valid or invalid ring signal respectively (until next POR or off-hook). DC/DC converter When a valid ring signal is detected, the dc/dc converter is started.

Datasheet AS2525 austria micro systems Revision 2.1 Page 14 of 27 Dialing and Control Functions Valid Keys The key scanning is enabled in off-hook mode with V DD above V REF . A valid key is detected from the keyboard by connecting the appropriate row to the column (R ON < 1 kΩ ). This can be done using an n x m keyboard matrix with single contacts. Three diodes and a resistor are used to extend the number of rows (see Figure 1: Keyboard Layout). PIN Code A PIN code is available for protecting various user settings. The default PIN code is set to 1111 and can be change as follows: 1. Press [PG] to enter program mode 2. Press [1] + (PIN) + [0] 3. Key in new PIN code (valid digits: 0 - 9, #) 4. Key in new PIN code again 5. Press [PG] (= store and exit) or go on-hook to abort It is also possible to reset the PIN code through set-up programming: 1. Press [PG] to enter program mode 2. Press [0] + (Password) + [#] + [0] 3. Press [1] to reset 4. Press [PG] (= store and exit) or go on-hook to abort Call Restriction A call restriction function is accommodated. This function can be activated using the PIN code. One or two digits can be programmed to inhibit dialing starting with said digit(s). If first digit(s) of a manual entered number or a number retrieved from a memory matches the content of the call restriction memory, dialing will be inhibited. Storing digits for call restriction: 1. Press [PG] to enter program mode 3. Press [1] for entering first digit of call restriction or [2] for entering second digit 4. Key in digit for call restriction 5. Press [PG] (= store and exit) or go on-hook to abort. Example 1: Prohibit all calls with numbers starting with 0. Activate: [PG] + [1] + (PIN) + [1] + [ 0] + [PG] Deactivate: [PG] + [1] + (PIN) + [1] + [ MT] + [PG] Example 2: Prohibit all calls with numbers starting with 09 (numbers starting with 00…, 01…, etc. will be allowed; pauses will be ignored, i.e. numbers starting with 0 PS 9 … will be prohibited). Activate: [PG] + [1] + (PIN) + [1] + [ 0] + [PG] + [PG] + [2] + Deactivate: [PG] + [1] + (PIN) + [1] + [ MT] + [PG] + [PG] + Pressing the [MT] key in place of the digit during programming will cancel said call restriction. The first and second digit can be stored, changed or deleted independent of each other. Key Lock A key lock function is provided to allow the user to protect the telephone from any misuse. When this function is available through the set-up programming, it is possible to enable/disable the key lock using the user PIN code. Enabling/disabling key lock: 1. Press [PG] to enter program mode 2. Press [1] +(PIN) + [#] + [6] 3. Press [1] for enable or [0] for disable 4. Press [PG] (= store and exit) or go on-hook to abort Also an easy key lock function is provided. This function can be activated/deactivated when the key lock function is available through set-up programming and the previous mentioned key lock through PIN code is disabled. Clear Memory Procedure It is possible to clear all stored numbers by using the PIN code as follows: 1. Press [PG] to enter program mode 2. Press [1] + (PIN) + [#] + [7] 3. Press [1] for clear

Datasheet AS2525 austria micro systems Revision 2.1 Page 15 of 27 4. Press [PG] (= store and exit) or go on-hook to abort Reset to Factory Settings It is possible to reset all settings to the default factory settings with following procedure: 1. Press [PG] to enter program mode 2. Press [1] + (PIN) + [#] + [8] 3. Press [1] for reset 4. Press [PG] (= store and exit) or go on-hook to abort Dial Mode Selection The default signaling mode (LD or MF) is selectable through following procedure: 1. Press [PG] to enter program mode 2. Press [3] to enter dial select mode 3. Press [0] for LD and [1] for MF 4. Press [PG] (= store and exit) or go on-hook to abort When default LD mode is selected, a temporary change to MF can be invoked by pressing the [∗∗∗∗] key. Temporary MF select with tone on first key pressure can be selected as option (see also Table 3: Parameter settings). The circuit will revert to LD by pressing the [FL] key or by next on- hook. Re-Dialing (Last Number Redial) Re-dialing is a facility that allows re-signaling of the last dialed number without keying in all the digits again. Numbers dialed out from any memory will also be stored in the LNR memory. The re-dialing works in following manner: - Any digit (including Flash, Pause, and MF select) being dialed is storable in the LNR memory up to a total of 31 digits. - If more than 31 digits are entered, re-dialing will be inhibited. - Pressing the [R/P] key as first entry after off-hook (LNR cursor at first digit) will invoke dialing the content of the LNR memory. - If the [R/P] key is pressed after entering one or more digits, the key will function as a pause key and each pressure will insert a pause. Pauses can also be inserted by pressing the [R/P] key in program mode. Flash Function A flash, [FL] key, activation will invoke a timed loop break. The flash duration can be programmed through set-up (see Figure 2: Keys for HEX-code entry and Table 4: Timing selection by HEX code): Table 22: Flash duration setting [PG] + [0] + (Password) + [ ∗∗∗∗] + (digit) + (HEX) + [PG] Digit Timing Flash Duration [4] HEX code Flash 1 [5] HEX code Flash 2 One of two pre-programmed can be selected as follows: 1. Press [PG] to enter program mode 2. Press [2] to enter flash select mode 3. Press [0] for duration 1 and [1] for duration 2 4. Press [PG] (= store and exit) or go on-hook to abort A flash entered will be stored in the LNR memory together with entered digits. After a recall a 270 ms pause will automatically be executed. Pauses Pauses can be inserted if the [R/P] key is pressed after entering one or more digits. Also during programming, pauses can be inserted by pressing the [R/P] key. Default pause duration is 1 second (P1) and an alternative pause of 3 second (P2) can be selected. These pauses can be changed through the set-up programming (see Table 3: Parameter settings) Memory Keys The keys [M1] to [M8] are direct memory access keys, [SH] key is used to access second level of direct memories, and the [MR] key is used for key-code dialing. Up to 26 numbers can be stored in the on-chip RAM. Each number can contain up to 21 digits (including pauses). During programming multiple pauses can be inserted by pressing the [RD] key. Example (45678P123 is stored in M1, where P is a pause and 123 the extension number): 1. Off-hook, wait for dial tone 2. Press [M1] - 45678 is dialed out - Dialing halts (pauses) - Dialing is resumed, 123 is dialed out. Memory dialing is cascadable up to a the maximum of 31 digits/data.

Datasheet AS2525 austria micro systems Revision 2.1 Page 16 of 27 Memory Storing Procedure Up to 28 numbers, each with maximum 24 digits, can be stored into the external EEPROM. The store procedure is as follows: 1. Press [PG] to enter program mode 2. Enter location (MR + digit 3 ; M1 to 8; or SH + M1 to 8) 3. Enter number 4. Press [PG] to store and exit or go on-hook to abort 5. Go to 1 for storing further numbers [Mute] starts and stops security storing (LCD-Symbols [ and ]) [R/P] inserts a pause (LCD-Symbol P) Tone Generator The tone generator incorporates the DTMF tones, 3 frequencies for the tone ringer and pacifier tones. DTMF The DTMF generator provides 7 frequencies. Table 23: DTMF frequencies Digit Frequency Rows Low Group 1 - 2 - 3 697 Hz 4 - 5 - 6 770 Hz 7 - 8 - 9 852 Hz ∗ - 0 - # 941 Hz Columns High Group 1 - 4 - 7 - ∗ 1209 Hz 2 - 5 - 8 - 0 1336 Hz 3 - 6 - 9 - # 1477 Hz The MF output level can be set through set-up program- ming. The range is from -18 dBm to -6 dBm in 1 dB steps. Table 24: DTMF level settings [PG] + [0] + (Password) + [0] + [6] + (x) + [PG] Key (x) Level (dBm) Low Group Key (x) Level (dBm) Low Group [0] -18 [7] -11 [1] -17 [8] -10 [2] -16 [9] -9 [3] -15 [M1] -8 [4] -14 [M2] -7 [5] -13 [M3] -6 [6] -12

3 Digit includes 0 – 9, ∗ and #

The pre-emphasis is 2.6 dB. The DTMF tones are according to CEPT recommendations. Tone Ringer (Melody/Volume) The tone ringer incorporates two basic selection, namely 2- tone or 3-tone melodies. The default set-up selection is the 3-tone ringer. Table 25: Basic ringer melody selection [PG] + [0] + (Password) + [#] + [8] + (digit) + [PG] Digit Ringer Melody [0] 2-tone [1] 3-tone The user can chose the following melodies as shown in below table. Table 26: 3-tone melody programming Procedure Digit Sequence Rate [PG] + [7] + [0] F1 F2 F3 F1 F2 F3 1 [1] F1 F2 F3 F1 F2 F3 2 [2] F1 F2 F3 F1 F2 F3 4 [3) F1 F2 F3 F1 F2 F3 6 [4] F1 F2 F3 F1 F2 F3 10 Press [PG] to store and terminate The chosen melody will be heard in the loudspeaker during programming. Pressing the [PG] key will end the procedure and the last selected melody will be stored. When 2-tone melody is selected through the set-up procedure, it is possible to chose the following melodies: Table 27: 2-tone melody programming Procedure Digit Sequence Rate [PG] + [7] + [0] F1 F2 F1 F2 F1 F2 2 [1] F1 F2 F1 F2 F1 F2 5 [2] F1 F3 F1 F3 F1 F3 2 [3) F1 F3 F1 F3 F1 F3 5 [4] F2 F3 F2 F3 F2 F3 2 Press [PG] to store and terminate Repetition rate means that a sequence of 6 frequencies is repeated 1, 2, 4, 5, 6 or 10 times within 1 second. Pacifier Tone Any key entry is acknowledged by a pacifier tone (key-in tone) of 1333 Hz. The pacifier tone can be enabled/disabled through set-up programming.

Datasheet AS2525 austria micro systems Revision 2.1 Page 17 of 27 Table 28: Pacifier tone selection [PG] + [0] + (Password) + [#] + [9] + (digit) + [PG] Digit Pacifier Tone (Key-in Tone) [0] Disabled [1] Enabled Table 29: Pacifier tones Key Entry Frequency Duration Acknowledge 1333 Hz 40 ms Reject/Terminate 1333 Hz 4 x 40 ms An invalid key entry will be indicated by a rejection tone of 4 times 40 ms. By MF dialing the DTMF tones are provided to the earpiece as comfort tone. The level of the comfort is selected through the set-up programming. Table 30: DTMF comfort tone level setting [PG] + [0] + (Password) + [0] + (y + x) + [PG] Key (y + x) Level (dBr) Earpiece Key (y + x) Level (dBr) Loudspeaker Serial Bus The AS2525 incorporates a microwire™ compatible serial bus (DO, DI, and CLK) with two chip select outputs (CS1 and CS2). The serial bus is used to: - sending data to the LCD driver (AS2591) when a key is pressed or a number is dialed out - reading and writing to the external EEPROM under following conditions: Table 31: EEPROM read/write timings ACTION DURATION After off-hook (debounced) 50 ms After on-hook (debounced) 200 ms After first rising edge at FCI 10 ms After PG is terminated 12…600 ms After pressing [V+]/[V-] 20 ms See also AS2591 data sheet for further information. LCD Control The AS2525 is designed to work together with the LCD driver AS2591 (see also AS2591 data sheet).

Datasheet AS2525 austria micro systems Revision 2.1 Page 18 of 27

Electrical Characteristics

Positive Supply Voltage -0.3 ≤ VDD ≤ 7V Input Current +/- 25 mA Input Voltage (LS) -0.3V ≤ VIN ≤ 12V Input Voltage (LI, CS) -0.3V ≤ VIN ≤ 8V Input Voltage (STB, RI) -2V ≤ VIN ≤ VDD +0.3V Digital Input Voltage -0.3V ≤ VIN ≤ VDD + 0.3V Electrostatic Discharge +/- 1000V Storage Temperature Range -65 to +125°C Total Power Dissipation 500mW * Exceeding these figures may cause permanent damage. Functional operation under these conditions is not permitted. Recommended Operating Range Symbol Parameter Conditions Min. Typ.* Max. Units VDD Supply Voltage (internally generated) Speech mode 3.0 5.0 V TAMB Ambient Operating Temp. Range -25 +70 °C fOSC Oscillator Frequency Resonator: Murata CSA 3.58M G312AM

3.58 MHz

• Typical figures are at 25°C and are for design aid only; not guaranteed and not subject to production testing. DC Characteristics (ILINE = 15 mA, recommended operating conditions unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Units IDD Operating Supply Current Speech mode Handsfree mode LD dialing, V DD = 2.5V Ring mode, V DD = 2.5V 200 300 mA mA µA µA IDD-EXT Available Supply Current for Peripheral Circuits Speech mode or MF dialing 2m A IDD0 Idle Current Idle mode, V DD = 2 V, T AMB = 25°C 2µ A VLI Line Voltage, LIVolt = 0 Line Voltage, LIVolt = 1 13 mA< I LINE < 100 mA 3.2 4.2 3.5 4.5 3.8 4.8 V V IOL Output Current, Sink Pin CS, SS VOL = 0.4V 1 mA VIL Input Low Voltage T AMB = 25°C V SS 0.3 V DD V VIH Input High Voltage T AMB = 25°C 0.7 V DD VDD V

Datasheet AS2525 austria micro systems Revision 2.1 Page 19 of 27 ILINE = 15 mA; f = 800 Hz; ZAC = 1000 Ω ; recommended operating conditions and default settings unless otherwise specified. Transmit Symbol Parameter Conditions Min. Typ. Max. Units ATX Transmit Gain, default M1/M2 to LS M3/M4 to LS 34.3 42.0 35.8 44.0 37.3 46.0 dB dB Variation with Frequency f = 500 Hz to 3.4 kHz +/- 0.8 dB THD Distortion V LS < 0.25 V RMS 2% VAGC ASCO tDECAY tDECAY Soft Clip Level Soft Clip Overdrive Attack Time Decay Time VLS =2 100 V dB µs/6dB ms/6dB ZIN Input Impedance; M1/M2 Input Impedance; M3/M4 k Ω kΩ AMUTE Mute Attenuation Mute activated 60 dB VNO Noise Output Voltage T AMB = 25°C, handset mode ATX = 37 dB -72 dBmp VIN MAX Input Voltage Range; M1/M2 and M3/M4 Differential +/- 1 V PEAK Line Driver Symbol Parameter Test Conditions Min. Typ. Max. Units VIN MAX Input Voltage Range; LI +/- 2 V PEAK VTX Dynamic Range; LI +/- 2 V PEAK RL ∆ ZAC/TEMP Return Loss Temperature Variation ZRL = 1000 Ω ; T AMB = 25°C 18 0.5 dB Ω /°C

Datasheet AS2525 austria micro systems Revision 2.1 Page 20 of 27 Receive Symbol Parameter Conditions Min. Typ. Max. Units ARX Receive Gain, Default LS to RO; volume reset LS to LO1/LO2; volume max. -2.0 25.0 -0.5 27.0 1.0 29.0 dB dB ARX-VOL Volume Control Range 8 steps through [V-]/[V+] keys 15 dB ∆ ARX Variation with Frequency f = 500 Hz to 3.4 kHz +/- 0.8 dB THD Distortion, RO Distortion, LO1/LO2 VRO = 0.25 V RMS VLO1/2 = 0.25 V RMS VAGC ASCO tDECAY tDECAY Soft Clip Level Soft Clip Overdrive Attack Time Decay Time V RO = VRI > 0.8 V RMS 100 VPEAK dB µs/6dB ms/6dB VNO VUFC Noise Output Voltage, RO Unwanted Frequency Components TAMB = 25°C, A RX = 3 dB -72 -60 dBmp dBmp ZIN Input Impedance, RI 8 kΩ VIN-MAX RI Input Voltage Range, RI +/- 2 V PEAK AST Side Tone Cancellation V RI < 0.25 V RMS 26 dB ZIN Input Impedance, STB 80 kΩ VIN-MAX ST Input Voltage Range, STB +/- 2 V PEAK General Timings Symbol Parameter Conditions Min. Typ. Max. Units td Key Debounce Time 15 ms tHS-L Low/High Debounce HS Input (going off-hook) 15 ms tHS-H High/Low Debounce HS Input (going on-hook) 210 ms tFD Flash Duration FL 1 (default) FL 2 (default) 100 275 285 102 300 ms ms tPFP Post Flash Pause 274 ms tAP Access Pause P1 (default) P2 (default) 0.9 1.0 3.0 1.1 sec. sec.

Datasheet AS2525 austria micro systems Revision 2.1 Page 21 of 27 DTMF Symbol Parameter Conditions Min. Typ. Max. Units DF Frequency Deviation Deviation of ceramic resonator is not included 1.2 % VMF MF Tone Level at LS (Low Group) Default -4.5 -5.5 -6.5 dBm VMF-RANGE MF Tone Level Range at LS (Low Group) 13 steps -18/-6 dBm ∆ VL_H Pre-emphasis, Low to High 2.0 2.6 3.2 dBr VUFC Unwanted Frequency Components 4.3 kHz…7 kHz 7 kHz....10 kHz 10 kHz…14 kHz -40 -46 -52 -58 -70 -80 dBm dBm dBm dBm dBm dBm tTD Tone Duration, Minimum Default 80 82.3 85 ms tITP Inter Tone Pause, Min. Default 80 82.3 85 ms tTR tTR Tone Rise Time Tone Fall Time From 10% to 90% amplitude From 90% to 10% amplitude ms ms VCT Comfort Tone Level, RO Relative to LS, 4 steps -36 -18 dBr LD Dialing Symbol Parameter Conditions Min. Typ. Max. Units tDR Dialing Rate Default Option 9.53 10 10.5 pps pps t/B Break Period Default Option Option 57 61.2 63 ms ms ms tM/ Make Period Default Option Option 38 40.8 16.5 42 ms ms ms tPDP Pre-Digit Pause 35 ms tIDP Inter-Digit Pause 800 880 ms

Datasheet AS2525 austria micro systems Revision 2.1 Page 22 of 27 Tone Ringer Symbol Parameter Conditions Min. Typ. Max. Units Frequency 1 Frequency 2 Frequency 3 770 1025 1280 800 1067 1333 830 1110 1385 Hz Hz Hz tDT Detection Time Initial 100 ms fMIN Min. Detection Frequency 12 13 14 Hz fMAX Max. Detection Frequency 68 70 75 Hz Pacifier Tone Symbol Parameter Conditions Min. Typ. Max. Units VPARO Tone Output Level, RO Tone Output Level, LO1/2 RL = 150 RL = 32 300 mV P-P mVP-P fPT Frequency Key entry 1333 Hz tTBD Tone Burst Duration Key entry Acknowledge, terminate PG mode Rejection, invalid key entry 140 4x40 ms ms ms tITP Inter-Tone Pause 80 ms

Datasheet AS2525 austria micro systems Revision 2.1 Page 23 of 27 Timing Diagrams tMtB tB tM tB tMtPDP tPDPtIDPtIDP MUTE MASK DPN LD dialling tMtB tB tM tB tMtPDP tPDPtIDPtIDP MUTE MASK DPN LD dialling with access pause tAP Pause tITPtTD MUTE MASK DPN MF dialling tTD tITP tITPtTD TONE tAP Pause Figure 9: Timing diagrams

Datasheet AS2525 austria micro systems Revision 2.1 Page 24 of 27 Test Circuit 10 µ LS RI STB LI CS Vss CS1 RO DO AGND VPP VDD LO1 LO2 RECI RECV DPn DI CLK CS2 22 µ 30 ohm 300 ohm 6 k 10 µ 1 µ BC 327 10 V 1 k 150 ohm ILINE B UL 600 ohm A 100 µ CM CI 22 µ 32 ohm VsSA SS BC 327 HF HS LED DM/HM 15 n 15 n 1 k 15 n 15 n 10 µ FT1 FT2 CBN FCI 10 µ 100 n 10 µ 10 µ Figure 10: Test circuit

Datasheet AS2525 austria micro systems Revision 2.1 Page 25 of 27 Typical Application Figure 11: Typical application

Datasheet AS2525 austria micro systems Revision 2.1 Page 26 of 27 Packaging 44-in plastic TQFP (suffix Q) For exact mechanical package dimensions please see austriamicrosystems AG packaging information. Marking, Pin-out YYWWAAA AS2525x Austria CS1 DO DI CLK OSC LED FCI DM/HM V SSA LO2 LO1 V PP CM CBN AGND CS2 DPn HF HS FT1 FT2 STB CS VSS LI RI SS LS CI RECI RECV RO VDD YY year of production WW calendar week of production AAA austriamicrosystems AG assembly ID Xr e v i s i o n

Ordering Information

Number Package Description AS2525 Q TQFP plastic thin quad flat package – 44 leads (suffix T) AS2525 F DOF Dice-on-Foil Devices sold by austriamicrosystems AG are covered by the warranty and patent identification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. Copyright Copyright © 1997-2002, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Datasheet AS2525 austria micro systems Revision 2.1 Page 27 of 27 Contact Headquarters austriamicrosystems AG Communications Business Unit A 8141 Schloss Premstätten, Austria T. +43 (0) 3136 500 0 F. +43 (0) 3136 525 01 www.austriamicrosystems.com Sales Offices Germany austriamicrosystems Germany GmbH Tegernseer Landstrasse 85 D-81539 München, Germany Phone: +49/89/693643-0 Fax: +49/89/693643-66 France austriamicrosystems France S.a.r.l. 124, Avenue de Paris F-94300 Vincennes, France Phone: +33/1/43 74 00 90 Fax: +33/1/43 74 20 98 Italy austriamicrosystems Italy S.r.l. Via Leone Tolstoi, 64 I-20146 Milano, Italy Phone: +39/0242/36713 Fax: +39/0242/290889 Switzerland austriamicrosystems Switzerland AG Rietstrasse 4 CH-8640 Rapperswil, Switzerland Phone: +41/55/220 9000 Fax: +41/55/220 9001 USA (west) austriamicrosystems USA, Inc. Suite 116, 4030 Moorpark Ave, San Jose, CA 95117, USA Phone: +1/408/345 1790 Fax: +1/408/345 1795 USA (east) austriamicrosystems USA, Inc. Suite 400, 8601 Six Forks Road Raleigh, NC 27615, USA Phone: +1/919/676 5292 Fax: +1/919/676 5305 United Kingdom austriamicrosystems UK, Ltd. Coliseum Business Centre, Watchmoor Park Camberley, Surrey, GU15 3YL, UK Phone: +44/1276/23 3 99 Fax: +44/1276/29 3 53 Japan austriamicrosystems AG Shin Yokohama Daini, Center Bldg. 10F 3-19-5, Shin Yokohama Kohoku-ku, Yokohama 222-0033, Japan Phone: +81/45/474 0962 Fax: +81/45/472 9845 Distributors & Representatives austriamicrosystems AG is represented by distributors in the following countries. Please contact your nearest regional sales office for the distributor address: Spain, Israel, Korea, Hong-Kong, Taiwan, Malaysia, Singapore, India, Brazil Application Support Please contact your local sales office or your distributor.