AS2536W

AS2533-36 AMSCO | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 26

Technical content

The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30

8141 Unterpremstaetten, Austria

Tel: +43 (0) 3136 500 0 e-Mail: ams_sales@ams.com Please visit our website at www.ams.com

Revision 8.10 Page 1 of 25 austria microsystems General Description The AS253x is a CMOS integrated circuit that contains all t he functions needed to build a high performance electronic telephone set with basic features. The AS253x incorporates a line interface, a speech circuit, a dialler and ringer. It is a real single)chip / single)die IC with 28 pins. It allows either package mounting or chip)on) board mounting. The device is available in 4 versions (pin)compatible) with different features ranging from LNR only (last number redial) to 4 direct (one)touch) memories and 10 indirect (two)touch) memories. The sliding cursor procedure makes the LNR function easy to use under various PABX systems. The versatility of the circuit is provided by pin options and a few external components. This allows fast time)to)market and easy adaptation to different PTT requirements. A unique EMI performance has been achieved due to the consequent use of CMOS amplifiers. Key Features Line Interface and Speech Circuit ) Electronic Rx volume control ) Electronic microphone mute ) Microphone amplifier with symmetrical input ) Rx and Tx soft clipping to avoid harsh distortion ) Real or complex impedance (EU compliant) ) Stabilized supply for dialler and peripherals ) Automatic line loss compensation ) Operating range from 13 to 100 mA (down to 5 mA with r educed performance) ) Unique EMI performance (EU compliant) Dialler ) LD/MF dialing and mixed)mode dialing ) 31 digit last number redial (LNR) ) 4 direct/10 indirect (AS2533/36), 12 direct (AS2535) ) Repeat dialing by busy or engaged (not AS2535) ) Confidence tone during memory programming and mute ) Notepad memory function ) Pause key for access pause or wait function ) 3 flash timings, 100 ms, 280 ms and 375/600 ms ) Sliding cursor protocol with comparison Ringer ) Ring frequency discrimination ) 3)tone melody generator ) Ring melody selection via keyboard ) Ring volume selection via keyboard ) Version available with fixed ring melody and ring volume Package ) SOIC 28 or DIE Block Diagram Figure 1 Block Diagram MultibStandard CMOS Telephone IC for Basic Telephones AS2533b36 DATA SHEET ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 2 of 25 Pin Description Pin # Symbol Function

4 V DD Positive Voltage Supply

T his is the supply pin for the circuit.

5 A GND Analog Ground

T his is the analogue ground for the amplifiers.

6 STB Side Tone Balance Input

This is the input for side tone cancellation.

7 CI Complex Impedance Pin

F or complex impedance a capacitor should be connected to

8 MO Melody Output

P DM output of the melody generator for tone ringing with internal open)drain transistor. Hi)Z when not active.

9 LLC Line Loss Compensation

S elect pin for line loss compensation (see also Figure 6 and Figure 7). LLC = A GND : 20 ) 50 mA LLC = V DD : 45 ) 75 mA LLC = V SS : none.

10 HS/DP Hook Switch Input and Dial Pulse Output

T his is an I/O that is pulled high by the hook switch when off)hook and an open drain pulls it low during break periods of pulse dialing and flash.

11 OSC OSCillator Input

P in for ceramic resonator (3.58 MHz). Reference: Murata CSTCC3M58GD3346)R0 SMD Murata CSTLS3M58GD3458)B0 Lead

12 MODE Signaling MODE Select Input

Row 1 LD mode, 10 pps, 33/66 ms Row 2 LD mode, 10 pps, 40/60 ms Row 3 LD mode, 20 pps, 33/66 ms Row 4 LD mode, 20 pps, 40/60 ms Row 5 LD mode, 10 pps, 33/66 ms, Temp. MF with tone on first * key entry Row 61 MF only, 82/82 ms Row 7 MF only, 82/160 ms During temporary MF: 82/160 ms Keyboard Columns (see key arrangements in Figure 2, Figure 3 and Figure 4) ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 3 of 25 Pin # Symbol Function Keyboard Rows (see key arrangements in Figure 2, Figure 3 and Figure 4)

21 FCI Frequency Comparator Input

T his is a Schmitt trigger input for ring frequency discrimination. Disabled during off)hook.

22 LED LED Output Driver

O utput for driving an LED that will be flashing when in Program/Mute state. Microphone Inputs Differential inputs for the microphone (electret).

25 CS Current Shunt Control Output

T his N)channel open drain output controls the external high power shunt transistor for the modulation of the line voltage and for shorting the line during make period of pulse dialing.

26 V SS Negative Power Supply

27 LI Line Input

T his input is used for power extraction and line current sensing.

28 RI Receive Input

T his is the input for the receive signal.

1 LS Line Current Sense Input

T his is the input for sensing the line current.

2 MFL MF Level Setting

A voltage divider connected from this pin to A GND and V SS can be used to set the DTMF level.

3 RO Receive Output

This is the output for driving a dynamic earpiece with an impedance of 150 to 300 Ω . Selection Overview Function AS2533 AS2534 /34R AS2535 AS2536 Direct memories (one)key) 4 0 12 4 Indirect memories (two)key) 10 0 0 10 Repeat dialing yes yes no yes LNR key yes yes yes yes Pause insertion by LNR key yes yes yes yes Pause (PS) key yes yes no yes P/M or MT key P/M P/M P/M P/M Tone/Pulse (T/P) key yes yes no yes Temporary MF by * key yes yes yes yes Centrex (A ) D) keys yes yes no yes Volume (VOL, –/+) keys yes yes yes yes Volume reset by off)hook yes no yes no Programming of tone ringer yes AS2534:yes AS2534R: no yes yes R3 Flash duration 600 ms 600 ms 600 ms 600 ms The corresponding product (AS2533)36) can be selected via bond)options (see chapter “Bond options” for details). ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 5 of 25 Keyboard Connections continued (either VOL or +/– keys) Figure 4 Keyboard Connection AS2535 Power On Reset The on chip power on reset circuit monitors the supply v oltage (V DD ) during off)hook. When V DD rises above a pprox. 1.2V, a power on reset occurs which clears the RAM. DC Conditions The normal operating range is from 13 mA to 100 mA. O perating range with reduced performance is from 5 mA to 13 mA (parallel operation). In the operating range all functions are operational. At line currents below 13 mA the AS253x provides an additional slope below 4.5V in order to allow parallel operation (see Figure 12). The dc characteristic (excluding diode bridge) is determined by the voltage at LI and the resistor R1 at line currents above 13 mA as follows: VLS = VLI + ILINE × R1 The voltage at LI is 4.5V in the normal operating range. During pulse dialing the speech circuit and other part of the device not operating is in a power down mode to save current. The CS pin is pulled to V SS in order to turn the e xternal shunt transistor on to keep a low voltage drop at the LS pin during make periods. AC Impedance The ac impedance of the circuit is set by external c omponents. The impedance can be real or complex. The ac impedance is determined as follows: ZAC = 33 — Z1 The dc value of Z1 should be 30 Ω to maintain correct dc performance. Return loss and side tone cancellation can be determined independent of each other. Speech Circuit The speech circuit consists of a transmit and a receive p ath with dual soft clipping, mute, line loss compensation and sidetone cancellation. PPP /// MMM 111 222 333 444 555 666 777 MMM 999 MMM 111000 MMM 111111 MMM 111222 MMM 555 MMM 666 MMM 777 MMM 888 MMM 111 MMM 222 MMM 333 MMM 444 888 999 000 *** ### RRR 111 RRR 222 RRR 333 C1 C2 C3 C4 ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 6 of 25 Transmit The gain of the transmit path is 37 dB for 600 Ω line termination from M1/M2 to LS (see test circuit Figure 9). The microphone input is differential with an input impedance of 20 k Ω . The soft clip circuit limits the output voltage at LI to 2V PEAK see Figure 11). The attack time is 30 µ s/6 dB and the decay time is 20 ms/6 dB. When mute is active, during dialing or after pressing the P/M key, the gain reduced by > 60 dB. Receive The gain of the receive path is 3 dB for 600 Ω line termination (test circuit Figure 9). The receive input the differential signal of RI and STB. When mute is active during dialing the gain is reduced by > 60 dB. During DTMF dialing a MF comfort tone is applied to the receiver. The comfort tone is the DTMF signal with level that is )30 dB relative to the line signal. The receive gain can be changed by pressing the volume keys. The VOL key gives a +5.4 dB boost and has a toggle function, i.e. repressing the key resets the gain to default. As an alternative the +/– keys can be used. The + key increases the gain by 8.1 dB in 3 steps and the – key decreases the gain by 5.4 dB in 2 steps (total range 13.5 dB). On AS2533/35 the volume is reset to default by next off)hook and on AS2534/36 the volume setting will remain at last setting. A POR will always reset the volume to default. The soft clip circuit limits the voltage at the receive output (RO) to 1V PEAK (see Figure 10). It prevents harsh d istortion and acoustic shock. Sidetone A good sidetone cancellation is achieved by using the following equation: Z Z Z Z BAL L ine = T he sidetone cancellation signal is applied to the STB input. Line Loss Compensation The line loss compensation is a pin option. When it is activated, the transmit and receive gains are decreased by 6 dB at line currents from 20 to 50 mA when LLC = A GND a nd 45 to 75 mA when LLC = high (@ R1 = 30 Ω ). The line loss compensation is disabled when LLC = low (see Figure 6 and Figure 7). Dialing Functions Valid Keys T he key scanning is enabled when HS/DPN is pulled high and V DD is above V REF . A valid key is detected from the k eyboard by connecting the appropriate row to the column (RON < 1 k Ω ) . This can be done using an n x m keyboard matrix with single contacts. Four diodes are used to extend the number of rows (see keyboard arrangement fig. 2). It is also possible to connect a microcontroller to the rows and columns (see application note AN3010). P/M and MT Key The P/M key is used to enter the Program/Mute state. Depressing the P/M key mutes the speech circuit and the device is in program state. Repressing the P/M key deactivates the mute and program state (toggle function).The MT key works in similar way, but has no program function. When program/mute is activated, the LED indication is turned on (flashing: 80 ms 'on' and 1 sec 'off'). Dial Mode Selection The default mode (LD or MF) can be selected by the mode pin. When default LD mode is selected, a temporary change to MF can be invoked by pressing T/P key (not AS2535) or the * key (when mode pin = row 5, the MF tone is generated with the first * key entry). The circuit will revert to LD by repression the T/P key (not AS2535) or by pressing the R (R1, R2 or R3) key or by next on)hook. When MF mode is selected by the mode pin, the circuit can not be changed temporary to LD but will remain in MF mode. Centrex Keys (not AS2535) The alphanumeric keys accommodate easy use of centrex services. The A, B, C and D keys are only valid in MF mode (including temporary MF) and are not storable. Pressing one of these keys will invoke the appropriate MF tones to be transmitted. The centrex keys are not stored in the RAM, and subsequently entered digits are buffered in FIFO. ZLI ZBA Figure 5 Side Tone Balance ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 7 of 25 Last Number Redial LNR is a facility that allows resignalling of the last manually dialed number without keying in all the digits again. The LNR is repeatable after each off)hook. The current content of the RAM is overwritten by new entries. A manually entered number is automatically stored in the LNR RAM. The capacity of the RAM is 31 digits. If a number greater than 31 digits is entered, the LNR facility will be inhibited (until new entries < 32 digits) and further entries will be buffered in FIFO. Pauses can be inserted by pressing the PS key (not AS2535). Post dialed digits, i.e. digits manually entered after LNR has been invoked, are not stored in RAM but buffered in FIFO. Repeat Dialing (not AS2535) The last manually dialed number can be repeated without going on)hook by pressing the RP key. If a called number is engaged, pressing the RP key will break the line for 1.6 second (to get a new dial tone) and after a pause the number will be repeated. The repeat function is enabled when prior to pressing the RP key, a number has been dialed, and it can be invoked an unlimited number of times until next on)hook. During the 1.6 second break the device is in power down mode to save current. Recall Function A recall ( R1, R2 or R3 key) activation will invoke a flash (timed loop break), however, the R1 flash is never executed in LD mode. R2 and R3 will be executed independent of the mode. If recall is the first entry in a digit string, it will be stored in LNR RAM when digit(s) are entered after the recall. If the recall key is depressed after a digit string has been entered or dialed out, the recall will not be stored but buffered in the FIFO together with subsequently entered digit. If pressing the recall key is not followed by digit entries, the LNR RAM remains intact. After a recall a 270 ms pause will automatically be Memory Keys (not AS2534) The keys M1 to M12 are direct memory access keys and the MR key (AS2533/36 only) is used for abbreviated dialing. Memory arrangement AS2533 /36 AS2534 AS2535 Storable numbers 14 0 12 Direct memory keys 4 0 12 Indirect memories 10 0 0 In the on chip RAM, numbers can be stored. Each number can contain up to 21 digits (including pauses). During programming multiple pauses can be inserted by pressing the PS (not AS2535) or the LNR key. Each pause inserted within the first 5 entries will automatically be terminated after 2 seconds whereas pauses inserted after location 5 in a digit string will halt dialing and can be terminated manually by pressing the PS (not AS2535) or the LNR key. The halt function allows in)dialing to an extension on a PABX. Example (45678–123 is stored in M1, where – is a pause/wait and 123 the extension number): off)hook, wait for dial tone press M1 (45678 is dialed out) await dial tone from called PABX press PS or LNR (123 is dialed out) Memory dialing is cascadable. However, the content of one memory must be dialed out before a new can be invoked. Sliding Cursor Procedure To accommodate easy and uncomplicated redialing (LNR) behind a PABX, a sliding cursor protocol is implemented. If new entries match the previous RAM contents, pressing the LNR key will dial out the remaining digits. If there is an error in matching, the LNR will be inhibited until next on)hook, and the RAM will contain the new number. Example (LNR content 912345, where 9 is access code): off)hook, wait for PABX dial tone press 9 and wait for external dial tone press LNR (12345 will be dialed out). Tone Generator The tone generator incorporates the DTMF tones, 3 basic frequencies for the tone ringer and pacifier tones. DTMF The DTMF generator provides 8 frequencies, namely: ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 8 of 25 Low group Digit 1)2)3)A 697 Hz Digit 4)5)6)B 770 Hz Digit 7)8)9)C 852 Hz Digit * )0)# )D 941 Hz High group Digit 1)4)7) * 1209 Hz Digit 2)5)8)0 1336 Hz Digit 3)6)9)# 1477 Hz Digit A)B)C)D 1633 Hz (not AS2535) The MF output level can be set with an external voltage divider on pin MFL. Voltage at pin MFL (2) DTMF Level (Low Grp.) AGND typ. 1.50* V )4.0 dBm 0.878 * A GND 1.317 V )5.2 dBm 0.791 * A GND 1.187 V )6.4 dBm 0.705 * A GND 1.058 V )7.6 dBm 0.620 * A GND 0.930 V )8.8 dBm 0.495 * A GND 0.743 V )10.0 dBm 0.372 * A GND 0.558 V )11.2 dBm 0.290 * A GND 0.435 V )12.4 dBm 0.210 * A GND 0.315 V )13.6 dBm 0.130 * A GND 0.195 V )14.8 d Bm VSS 0.000 V (V SS) )16.0 dBm (ZLINE = 600) *typical MFL values for A GND = 1.5V T he preemphasis is 2.6 dB. The MF tones are according to CEPT recommendations. Tone Ringer (Melody/Volume) The three basic frequencies of the melodies are: F1 = 800 Hz, F2 = 1067 Hz, and F3 = 1333 Hz (± 5%). The repetition rate and the volume of the tone ringer melodies can be programmed by pressing P/M and # followed by a digit as follows: Digit Repetition Rate Volume 1 1 time (50 ms pause) ) 16 dB 2 1 time (50 ms pau se) ) 7 dB 3 1 time (50 ms pause) 0 dB (max.) 4 4 times ) 16 dB 5 4 times ) 7 dB 6 4 times (default , AS2534R ) 0 dB (max.) 7 10 times ) 16 dB 8 10 times ) 7 dB 9 10 times 0 dB (max.)

0 None Off

The procedure is ended by repressing the P/M key. The default setting is digit 6, i.e. after a power on reset the device will start up with repetition rate 4 and maximum volume. If digit 0 is programmed, the tone ringer will be turned off until next off)hook where it will turn back to the last setting before 0. The programmed settings are stored in the on chip RAM. Repetition rate means that a sequence of 6 frequencies is repeated 1, 4 or 10 times within 1 second. The sequence of the frequencies is controlled by the sequence register as follows: Sequence F1 F2 F3 F1 F2 F3 … Pacifier Tone By MF dialing the DTMF tones are provided to the earpiece as comfort tone. During programming a key entry is acknowledged by a pacifier tone of 1477 Hz. The level of the pacifier tone is approximately 60 mV at the RO output. The duration is 40 ms after every key entry in program mode. When terminating the program mode with the P/M key an acknowledge tone of 140 ms is provided. An invalid key entry, however, will cause a termination of the program mode indicated by a rejection tone of 4 times 40 ms with 28 ms pauses between the tone bursts. Ring Frequency Discrimination The ring frequency discriminator assures that only signals w ith a frequency between 13Hz and 70 Hz are regarded as valid ring signals. The time for recognizing a valid ring signal is 1/f seconds, where 'f' is the ring frequency. When a valid ring signal is present for 73 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). ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 10 of 25 Typical Application Complex Impedance

270 W + 750 W // 150 nF)

included. The external components might change to comply with various national PTT regulations and to interface to different transducers. Since the AS253x is a component and not a complete system, it can not be approved as a stand alone part by the standard bodies. Hence, full conformance to any standards is depending on the application in which the AS253x is being used, and therefore, approvals by the standard bodies are the responsibility of the customer and austriamicrosystems AG will not have tested the product to meet specific standards. For further application information please refer to application note AN2201 Figure 8 Typical Application ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 11 of 25 Programming Procedures Procedure Principles The procedures for utilizing the features of the AS253x are o ptimized out of consideration for the human factor in order to: ) meet the user’s expectations ) be easy to learn and relearn ) not invoke any automatic functions which the user d oesn’t expect ) protect the user from committing critical errors, e.g. d ialing wrong numbers, deleting stored numbers, etc. ) be consistent, simple and usable. T he following chapters describe the operating procedures for the provided features. Pressing an invalid key or key combination during programming will cause the device to abort the program state. Pressing any key combination or sequence which is not described or defined may cause the device to enter a state or mode that does not comply with the expectation of the user. In such cases, any undesired state can be terminated at any time by going on)hook / off) hook which will generate a functional reset. Storing Numbers (not AS2534) Up to 14 numbers, each with maximum 21 digits, can be s tored into the internal RAM. 1. Press [P/M] to enter program mode 2. Enter location (MR + digit 1; or M1 to M12) . Enter number ) entries (0)9, *, #, PS or LNR, R1, R2, R3) will b written directly into the selected memory location) 4. Press [P/M] to store and exit or go on)hook to abort 5. Go to 1 for storing further numbers Programming Tone Ringer Three different ringer melodies with three levels each can b e programmed. AS2534R cannot be programmed. 1. Press [P/M] to enter program mode 2. Press [#] for ringer programming mode 3. Enter Code to select ringer melody and volume(see code table in section Tone Ringer (Melody/Volume) 4. Press [P/M] to store and exit or go on)hook to abort

1 Digit includes 0 – 9

W hen Code 0 (tone ringer off) has been programmed, the device will automatically return to previous setting (different from 0) by next off)hook. Temporary MF The procedure below assumes that the device is operated i n puls mode. 1. Go off)hook 2. Press [*] or [T/P] to switch to DTMF mode 3. Press [R] or [T/P] to switch back to PULS mode 4. Got to 2. to switch again to DTMF mode Mode pin is connected to row 1, 2, 3, 4, or 5. When mode pin = row 5, pressing the [*] key also transmits the tone by MF selected. The [T/P] key (not AS2535) can be used alternatively to the [*] key. Automatic Dialing The following procedure describes the dialing procedure a nd the internal sequences: 1. Go off)hook 2. Enter the number by pressing digit, [M1]b[M12], [LNR] or [MR] + digit 3. The number is internally buffed in the FIFO 4. Tone) or Puls)Dialing starts 5. Wait for connection 6. Got to 2 for entering postdialed digits Postdialed digits are not stored but buffed in the FIFO. ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 12 of 25 Timing Diagrams LD Dialing LD Dialing with Access Pause MF Dialing tIDP tB tPDP tIDP tPDP tM tM tB tM tB MUTE MASK HS/DPN tPDP tPDP tM tM tM tIDP tB tIDP tB tB MUTE MASK HS/DPN tAP tTD tITP MUTE HS/DPN LS tTD tTD tITP tITP tAP ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 13 of 25 Flash Repeat Dialing (not AS2535) tAP MUTE H S/DPN Power Down tRP Number e ngaged New connection RP key DIALLING tFD tM tM tM tFD tM MUTE MASK HS/DPN tPFP ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 14 of 25

Electrical Characteristics

Positive Supply Voltage )0.3V < V DD < 7V Input Current ± 25mA Input Voltage (LS) )0.3V < V IN < 10V Input Voltage (LI, CS) )0.3V < V IN < 8V Input Voltage (STB, RI) )2V < V IN < V DD+0.3V Input Voltage (MO) )0.3V < V IN < +35V Digital Input Voltage )0.3V < V IN < V DD+0.3V Electrostatic Discharge (HBM 1.5k Ω )100pF) ± 1000V Storage Temperature )65°C to +125°C Recommended operating conditions Supply Voltage * (Speech Mode) 3.8V < V DD < 5V Oscillator Frequency (Resonator: Murata CSA 3.58M G312AM) 3.58 MHz Operating Temperature )25°C to +70°C * This voltage is generated internally DC Characteristics (ILINE = 15 mA unless otherwise specified) Symbol Parameter Conditions Min. Typ. Max. Units IDD Operating Current S peech mode MF dialing LD dialing, V DD = 2.5V R ing mode, V DD = 2.5V 200 300 5 mA mA µA µA IDD0 Retention Current I dle mode, V DD = 2 V, TAMB = 25°C 0.05 µA VLI Line Voltage (default) 13 mA < I LINE < 100 mA 4.5 V IOL Output Current, Sink C S, HS/DP, MO VOL = 0.4V 1.5 mA IOL Output Current, Sink; LED V OL = 0.4V 4 mA VIL Input Low Voltage H S/DPN; FCI TAMB = 25°C VSS 0.3 V DD V VIH Input High Voltage H S/DPN; FCI TAMB = 25°C .7 VDD V DD V ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 15 of 25 AC Characteristics ( I LINE = 15 mA; f = 800 Hz unless otherwise specified) Symbol Parameter Conditions Min Typ Max Units Tx Transmit Test Circuit Figure 9 ATX Gain, Transmit M 1/M2 to LI 35.1 36.6 38.1 dB Δ ATX/F V ariation with Frequency f = 500 Hz to 3.4 kHz ±0.8 dB THD Distortion VLI < 0.25V RMS 2 % VAGC Soft Clip Level 2 V PEAK ASCO Soft Clip Overdrive 20 dB tATTACK Attack Time 30 µ s/6 dB tDECAY Decay Time 20 ms/6dB ZIN Input Impedance (M1/M2) 20 kΩ AMUTE Mute Attenuation M ute activated 60 dB VNO Noise Output Voltage T AMB = 25°C )72 dBmp VIN Max Input Voltage Range Differential ±1 V PEAK (M1/M2) Single Ended ±0.5 V PEAK BJT Output Driver VIN MAX Input Voltage Range (LI) ±2 V PEAK VTX Dynamic Range ±2 V PEAK RL Return Loss ZRL =1000 Ω ; T AMB = 25°C 1 8 dB Δ ZAC/TEMP T emperature Variation 0.5 Ω /°C Rx Receive Test Circuit Figure 9 ARX Receive Gain (Vol. default) LI to RO 1 .5 3 4.5 dB AVOL Volume Gain V OL key +5.4 dBr AVOL Volume Gain – /+ keys )5.4/+8.1 dBr Δ ARX/F V ariation with Frequency f = 500 Hz to 3.4 kHz ±0.8 dB THD Distortion VRI < 0.25V RMS 2 % VAGC Soft Clip Level VRO = 1 V PEAK ASCO Soft Clip Overdrive 10 dB tATTACT Attack Time VRI > 0.8V RMS 30 µ s/6 dB tDECAY Decay Time 20 ms/6dB VNO Noise Output Voltage T AMB = 25°C )72 dBmp ZIN Input Impedance (RI) 8 kΩ VIN RI Input Voltage Range (RI) ±2 V PEAK AST Sidetone Cancellation V RI < 0.25V RMS 26 dB VIN ST Input Voltage Range (STB) ±2 V PEAK ZIN Input Impedance (STB) 80 kΩ ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 16 of 25 AC Characteristics (cont´d) (ILINE = 15 mA; f = 800 Hz unless otherwise specified ) Symbol Parameter Conditions Min Typ Max Units Keyboard tD K ey Debounce Time 15 ms HS/DPN Input tHS)L L ow to High Debounce Going off)hook 15 ms tHS)H H igh to Low Debounce Not LD dialing 210 ms During LD dialing 270 ms DTMF F Frequency deviation T AMB = 25°C, Note 5 1.2 % VMF M F Tone Level (Low group) MFL = A GND , TAMB = 25°C ) 2.5 ) 4 ) 5.5 dB VMF M F Tone Level (Low group) MFL Range = V SS … AGND , TAMB = 25°C )16…)4 dB Δ VL)H P reemphasis Low to High T AMB = 25°C, 1 .8 2.4 3.0 dB VUFC U nwanted F. Components 300 Hz...5 kHz ) 40 dBm Note 3; MFL = V SS 5 kHz...14 kHz ) 50 dBm 14 kHz...28.5 kHz ) 70 dBm 28.5 kHz...40 kHz ) 80 dBm tTD T one Duration Note 1&6; Mode=row 6 or 7 80 82.3 85 ms tITP I nter Tone Pause Note1; Mode=row 6 80 82.3 85 ms tITP I nter Tone Pause Note 1 & 6; Mode=row 7 150 165 170 ms tTR T one Rise Time Note 2 5 ms tTF T one Fall Time Note 2 5 ms LD tDR D ial Rate Mode = row 1, 2 or 5 9.53 10 10.5 pps Mode = row 3 or 4 19.05 20 21 pps t/B B reak Period Mode = row 2 57 61.2 63 ms t/B B reak Period Mode = row 4 28.5 30.6 31.5 ms t/B B reak Period Mode = row 1 or 5 63 66 69 ms t/B B reak Period Mode = row 3 31.5 33 34.5 ms tM/ M ake Period Mode = row 2 38 40.8 42 ms tM/ M ake Period Mode = row 4 19 20.4 21 ms tM/ M ake Period Mode = row 1 or 5 31.5 33 34.5 ms tM/ M ake Period Mode = row 3 15.7 16.5 17.3 ms tPDP P re)Digit Pause 35 ms tIDP I nter Digit Pause Mode = row 1, 2, 3, 4 or 5 fosc = 3.58 MHz 780 790 800 ms tHS)H H igh to Low Debounce During LD dialing 270 ms tMO M ute Overhang tM ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 17 of 25 Symbol Parameter Conditions Min Typ Max Units tFD Flash Duration 1 R 1 key 100 102 ms Flash Duration 2 R2 key 270 300 ms Flash Duration 3 R3 key (AS2533/34/35/36) 600 650 ms tPFP Post Flash Pause 274 ms tAP Access Pause N ote 8 2.0 2.05 2.12 sec tRP Repeat Break Time 1.6 sec Tone Ringer VMO Melody Output PDM tMD Melody Delay 10 ms F1 Frequency 1 800 Hz F2 Frequency 2 1067 Hz F3 Frequency 3 1333 Hz tDT Detection Time I nitial 1/f + 73ms s tTO Detection Time)out note 4 ms fMIN Min. Detection Frequency 13 Hz fMAX Max. Detection Frequency 70 Hz Pacifier Tone Program Mode Only fPT Frequency P /M mode, key entry 1477 Hz VRT Level (RO) K ey entry 60 mV tRTD)E Duration, Key Entry Valid key entry, prog. 40 ms tRTD)A Duration, Acknowledge Terminate with P/M key 140 ms tRTD)R Duration, Reject I nvalid key entry, note 7 4x40 ms LED Output tLED)ON "on)time" P /M state 80 ms tLED)OFF Interval P /M state 1 sec Comfort Tone (DTMF) VCT Level (RO) R elative to LS )30 dBr Note 1: The values are valid during automatic dialing and are minimum values during manual dialing, i.e. the tones will continue as long as the key is depressed. Note 2: The rise time is the time from 10% of final value till the tone amplitude has reached 90 % of its final value. Note 3: Relative to high group. Note 4: The FCI circuit is reset by POR and HS/DPN pulled high (off)hook). After a reset the FCI circuit is in a standby state. A positive edge on FCI will start a 73 ms timer and the frequency discrimination is initiated. Whenever a period of the ring signal is missing, the timer is reset. When a valid ring signal is present for 73 ms, the melody generator is started and is directly controlled by the ring signal. This condition will remain until a new reset. Note 5: This does not include the frequency deviation of the ceramic resonator. Note 6: During temporary MF mode. Note 7: An invalid key entry in program mode will invoke a tone sequence with 4 tone bursts of 40 ms and pauses between bursts of 28 ms and abort the program mode. Note 8: Pauses inserted within the first 5 entries of a digit string will be automatically terminated after 2 seconds. Pauses inserted after location 5 can only be terminated manually by pressing the PS or LNR key. ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 18 of 25 Test Circuit Figure 9 Test Circuit ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 20 of 25 Bond Pad Layout Bond Options Product Version Bond Pad Connection AS2533 BOND_AS2535 BOND_AS2536 not bonded not bonded AS2534/34R (1) B OND_AS2535 BOND_AS2536 not bonded bonded to MODE AS2535 BOND_AS2535 BOND_AS2536 bonded to MODE not bonded AS2536 BOND_AS2535 BOND_AS2536 not bonded bonded to MODE (1) For deliveries as packaged devices (SOIC28), LNR only is tested, direct and indirect memories are not tested! ams AG Technical content still valid

Data Sheet AS2533)36 austria m icro systems R evision 8.10 Page 21 of 25 Sizes and Coordinates Die Size: 3.190mm x 2.975mm B ond Pad Size: 85µm x 85µm Bond Pad Co)ordinates: Reference co)ordinate of DIE = DIE center Reference co)ordinate of PAD = PAD center X [µm] y [µm] Pad Name Pin No x [µm] y [µm] Pad Name Pin No Pads on the Left Pads on the Right )1413.50 1052.25 VDD 4 1392.50 )1053.80 R1 20 )1413.50 796.25 AGND 5 1392.50 )663.00 FCI 21 )1413.50 586.25 STB 6 1392.50 )319.80 LED 22 )1413.50 226.25 CI 7 1413.50 408.75 M1 23 )1392.50 )107.75 MO 8 1413.50 683.75 M2 24 )1392.50 )399.35 LLC 9 Pads on the Top )1392.50 )974.20 HS/DP 10 1227.50 1301.25 CS 25 Pads on the Bottom 1079.50 1301.25 VSS 26 )1244.00 )1285.00 OSC 11 969.50 1301.25 VSS 26 )862.10 )1285.00 BOND_AS2535 627.50 1301.25 LI 27 )696.70 )1285.00 MODE 12 54.50 1301.25 RI 28 )432.50 )1285.00 BOND_AS2536 )90.50 1301.25 LS 1 )215.10 )1285.00 C4 13 )449.50 1301.25 MFL 2 )49.70 )1285.00 C3 14 )744.50 1301.25 RO 3 214.50 )1285.00 C2 15 379.90 )1285.00 C1 16 677.30 )1285.00 R4 17 842.70 )1285.00 R3 18 1173.30 )1285.00 R2 19 ams AG Technical content still valid

Data Sheet AS2533)36 austria microsystems Revision 8.10 Page 22 of 25 Vertical Structure of Bond Pads Process CXQ/CXB – FAB B General Conditions Passivation 200 nm silicon oxynitride + 550 nm silicon nitride Allowed Loss after Assembly < 5% in average < 10% for a single delivery lot Compensation is limited to replacement of the number of defectives exceeding the above allowances. Quantity of dice per delivery lot Only complete wafers can be delivered, therefore the number of good dice delivered may differ from the order quantity up to ±1000 pcs. Storage Conditions Dice on wafer or dice on foil must be stored in originally sealed boxes or bags. For storage period ) see below. Except for RMA, opened boxes or bags will not be accepted by a u s t ri a m i c ros y s t e m s for return Conditions for Delivery as Wafer Wafer diameter 200 mm (ams)FAB)B) or 150 mm (XFAB) Wafer thickness 380 ± 20µm (ams)FAB)B) or 640 ± 20µm (XFAB) Back finishing back grinding, silicon Scribe lane width 100 ± 20µm Packing Wafer Box Ultrapack 200 / sealed in foil bags Max. Storag e time in sealed box 6 month, Tamb = 25 ° C Layer Specification metal 2 upper layer: lower layer: 960 nm AISiCu 98.5% Aluminium 1.0% Silicon 0.5 % Copper 40 nm Titanium metal 1 upper layer: lower layer: 450 nm AISiCu 98.5 % Aluminium 1.0% Silicon 0.5 % Copper 40 nm Titanium metal 1 barrier upper layer lower layer 80nm Titanium Nitride 30nm Titanium polysili con 270 nm polysilicon oxide 460 nm thermal oxide silicon substrate polysilicon Si substrate oxide metal 1 barrier metal 1 metal 2 ams AG Technical content still valid

Data Sheet AS2533)36 austria microsystems Revision 8.10 Page 23 of 25 Conditions for Delivery as Dice on Foil, sawn Die thickness 380 ± 20µm Back finishing back grinding, silicon Frame Material: Plastic Size: see figure Frame Position Tolerance Center wafer to frame: ± 4mm Angle deviation wafer to frame: ± 8° Orientation wafer to frame: Wafer flat to frame side with kerfs Covering adhesive foil to frame: >5mm Tape Type: PVC with acrylic adhesive Thickness: 70 ± 20 µm Sawing conditions Sawing mode: Saw ) through mode Sawing width: typ. 60 µm Kerf depth in foil: typ. 20 µm XV )dimension deviation: max.25 µm Packing frame sealed in foil bags filled with nitrogen Storage time In sealed bags 2 months, Tamb = 25 °C Mechanical Drawing of Frame (valid for 200 mm and 150 mm wafer) ams AG Technical content still valid

Data Sheet AS2533)36 austria microsystems Revision 8.10 Page 24 of 25 Packaging The device is available in the packages outlined below (not to scale). For exact mechanical package dimensions please see austriamicrosystems AG packaging information. 28)pin plastic SOIC (suffix T) Max. Body Length 18.1mm / 713mil Max. Body Width 7.6mm / 300mil Pitch 1.27mm / 50mil Pin Configuration

28 Pin SOIC (suffix T)

Ordering Information

Device Order Number Package Features AS2533 T AS2533U)ZSO)U 28 pin SOIC in tubes LNR, 4 direct/10 indirect memories AS2533 F pls see bottom rows Dice on foil, sawn LNR, 4 direct/10 indirect memories AS2533 W pls see bottom rows Dice on wafer LNR, 4 direct/10 indirect memories AS2534B T AS2534U)ZSO)U 28 pin SOIC in tubes LNR only, no direct/indirect memories (2) AS2534B F pls see bottom rows Dice on Foil, sawn LNR only, no direct/indirect memories AS2534B W pls see bottom rows Dice on Wafer LNR only, no direct/indirect memories AS2534R T AS2534R)ZSO)U 28 pin SOIC in tubes LNR only, no direct/indirect memories, ringer fixed (2) AS2534R F pls see bottom rows Dice on Foil, sawn LNR only, no direct/indirect memories, ringer fixed AS2534R W pls see bottom rows Dice on Wafer LNR only, no direct/indirect memories, ringer fixed AS2535 T AS2535U)ZSO)U 28 pin SOIC LNR, 12 direct memories AS2535 F pls see bottom rows Dice on Foil, sawn LNR, 12 direct AS2535 W pls see bottom rows Dice on Wafer LNR, 12 direct AS2536 T AS2535U)ZSO)U 28 pin SOIC LNR, 4 direct/10 indirect memories AS2536 F pls see bottom rows Dice on Foil, sawn LNR, 4 direct/10 indirect memories AS2536 W pls see bottom rows Dice on Wafer LNR, 4 direct/10 indirect memories AS253x F AS253xU)ZSW)F Dice on Foil, sawn All versions (1) AS253x W AS253xU)ZSW Dice on Wafer All versions (1) AS253xR F AS253xR)ZSW)F Dice on Foil, sawn All versions, ringer fixed (1) AS253xR W AS253xR)ZSW Dice on Wafer All versions, ringer fixed (1) Please Note: (1) For wafer delivery or dice)on)foil delivery, the versions can be selected by bond options. (2) For deliveries as packaged devices (SOIC28), LNR only is tested, direct and indirect memories are not tested! ams AG Technical content still valid

Data Sheet AS2533)36 austria microsystems Revision 8.10 Page 25 of 25 Contact Information austriamicrosystems AG Business Unit Communications A 8141 Schloss Premstaetten, Austria)EU T. +43 (0) 3136 500 0 F. +43 (0) 3136 500 5692 http://www.austriamicrosystems.com For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact Copyright Copyright © 1997)2006, 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. All products and companies mentioned are trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification 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. 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. a u s t r i a micros y s t e m s – a leap ahead ams AG Technical content still valid