AS2523T

DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 20

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 1.13 Page 1 of 19 austria micro systems Key Features - Line/Speakerphone circuit on a 28- pin CMOS -IC, simple inventory: same die for AS2523/24 and AS2523/24B - Serial I/F on AS2523, parallel I/F on AS2524 - Enhanced voice switching - Background noise monitoring - Tx - and Rx -gain programmable on AS2523 only - Digital volume control of Rx signals on AS2523 only - DC characteristic programmable on AS2523 only - Dual softclipping in handset mode on AS2523 only - Dual softclipping in handsfree mode on AS2523 only - Loudspeaker amplifier for loudhearing and handsfree - Supply voltage generation for external circuitry - Automatic line loss compensation on AS2523 / 24B only - Real and complex impedance selectable by external components - Side tone adaptation selectable by external components - Unique EMC performance - Operating range from 15mA to 100mA (down to 5mA with reduced performance) - Few external components General Description AS2523/24 is a CMOS integrated circuit that incorporates DC and AC line adaptation (DC -mask and synthesized AC - impedance of 1000Ω ) as well as a speech cir cuit with softclipping, line loss compensation and Rx- volume control for handset and handsfree operation. It shall act as an a/b - line powered device, which is controlled by a CPU via a serial interface on AS2523 or a standard dialler via a parallel interface on AS2524 and AS2524B.

Applications

Enhanced handsfree feature phones with CallerID and extended displays. The AS2524 and AS2524B are developed to interface with common Taiwanese dialers. Package Available in 28 -pin SOIC or die Block Diagram Telephone Line Interface and Speakerphone Circuit AS2523, AS2524, AS2524B DATA SHEET ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 2 of 19 Pin d escription Pin # Symbol Function

15 LS Line Current Sense Input

Analog input for sensing the line current

12 LI Line Input

Analog input used for power extraction and line current sensing

13 RI Receive Input

Analog input for ac -separated receive signal

9 STB Side Tone Balance Input

Analog input for side tone cancellation network

10 CS 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

16 CI Complex Impedance Input

Analog input pin for the capacitor to program a complex impedance

14 SS 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

11 VSS Voltage Source Source

Negative Analog Power Supply

18 VDD Voltage Drain Drain

Positive Analog Power Supply

19 AGND Analog Ground

Special ground for the internal amplifiers 8 M1 Microphone Input 1 Differential input for the handset microphone (electret)

6 M2 Microphone Input 2

Differential input for the handset microphone (electret) 7 M3 Microphone Input 3 Differential input for the handsfree microphone (electret) 5 M4 Microphone Input 4 Differential input for the handsfree microphone (electret)

17 RO Receive Output to Handset

Output for driving a dynamic earpiece with an impedance from 150Ω to 300Ω ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 3 of 19 Pin # Symbol Function 25 xCS Chip Select on AS2523 Chip select input of the serial interface. Internal pull -up resistor ( 100kOhm ) /xMUTE Mute transmit -, receive - path and activate tone path on AS2524 and AS2524B

26 DI Data Input on AS2523

Data input of the serial interface. Internal pull -up resistor ( 100kOhm ) /xPD Power down mode for AS2524 and AS2524B (On -hook)

27 CLK Clock on AS2523

Clock input of the serial interface. Internal pull -up resistor ( 100kOhm ) /HFE Handsfree mode operation on AS2524 and AS2524B 23 LO Loudspeaker Output. Output pin i s for a 25 Ω loudspeaker 2 FT1 Analog input pin for connecting a capacitor for offset cancellation.

3 TXO Analog output of the transmit signal

4 TXV Analog input for the transmit signal in the voice switching path

1 CBN Analog input pin for connecting a capacitor for background noise monitoring. 20 RECI Analog input for the handsfree receive path. Should be connected to RO via coupling capacitor. 21 RECV Analog input for receive voice switching path. 24 VSSA Power supply pin for LO output amplifier. 22 VPP Power supply pin for LO output amplifier. 28 TONEIN Analog input for DTMF -signals. ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 4 of 19 Detailed Block Diagram ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 5 of 19 Functional Description DC conditions The normal operating mode is from 15mA to 100mA. An operating mode with reduced performance is from 5mA to 15mA. In the line hold range from 0mA to 5mA the device is in a power down mode. The DC characteristic is determined by the voltage at LI - pin and a 30Ω resistor between LI - and LS -pin. It can be calculated by the following equation: V LS = V LI + I Line * 30Ω. V LI can be programmed to be 3.5V or 4.5V. 2/4 wire conversion AS2523/24 has built in two Wheatstone bridges with one common ground. This provides a maximum of independence of AC -impedance and side tone from each other. One can adapt side tone without changing the AC - impedance. AC- impedance The AC -impedance of AS2523/24 is set to t.m. 1000Ω . With the external capacitor at CI -pin it can be programmed complex. With an external resistor of approx. 1.5k Ω connected to the LS -pin it can be programmed to 600Ω . Side Tone A good side tone cancellation can be achieved by using the following equation: Z BAL /ZLINE = 10 Transmit path The gain of the M1/M2 → LS is set to +37dB. This gain can be changed by programming on AS2523 from +30dB to +45dB in 1dB steps (Register Txgain ), on AS2524 / 24B it is set to +37dB per default. The input is differential with an impedance of 10k Ω. The soft clip circuit limits the output voltage at LS to 2V p. There is LLC for this path. The gain of the M3/M4 → LS is set to +46dB. This gain can be changed by programming from +39dB to +54dB in 1dB steps on AS2523. The input is differential with an impedance of 10k Ω. The soft clip circuit limits the output voltage at LS to 2V p. There is no LLC for this path. Receive path The gain of the LS → RO receive path is set to +7.5dB. This gain can be changed by programming from – 7.5dB to +7.5dB in 1dB steps (Register Rxgain). The receive input is the differential signal of RI and STB. The soft clip circuit limits the output voltage at RO to 1V p. It prevents harsh distortion and acoustic shock. There is LLC for this path. The gain of the LS → LO receive path is set to +32dB. This gain can be changed by programming from +19dB to - 34dB in 1dB steps. The user can also change the gain via Register Handsfree receive end gain (See section "Handsfree"). The receive input is the differential signal of RI and STB. The soft clip circuit limits the output voltage at LO to 1.1V p. It prevents harsh distortion and acoustic shock. There is optional LLC for this path. Line Loss Compensation (AS2523, AS2524B) - programmable on AS2523 - not activated at AS2524 - permanently activated at AS2524B When it is activated, the transmit and receive gains for both I/O’s are decreased by 6dB at line currents from 20mA to 50mA or f rom 45mA to 75mA. 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 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 Register Handsfree receive end gain between 0dB and - 20dB. The following table shows how voice switching is controlled TX_atten Backgnd noise monitor Voice switching speech RX voice switching circuit ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 6 of 19 0mV 100mV RO RECI +3dB +14dB Voice switching speech Gmax = -4dB … +16dB ( Vol) Gmin = -33dB Offset comp CompressPeak detector Cmicoffset +23dB CBckgnd Compress Peak detector Compress Peak detector LINE Gmax = +9dB Gmin = -21dB … -40dB ( Vol) +9dB RECV FT1 CBN +8dB +17dB TXO TXV Speech Mode Rx-gain Tx-gain Remark Rx > Tx_atten X Receive 0db to - 20dB -50dB to -30dB adjustable with VOL -setting Tx_atten > Rx NO Idle -25 -25 middle position Tx_atten > Rx YES Transmit -50dB 0dB independent of VOL -setting -50dB -25dB 0dB TX-modeRX-mode IDLE-mode Vol minVol defaultVol max TX-gain RX-gain -10dB -20dB -40dB -30dB ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 8 of 19 Serial Interface on AS2523 Registers The settings of the AS2523 are stored in 16 registers. Each register has 4 bit data width. Timing The data format for writing to a register has the following form: A3 A2 A1 A0 D3 D2 D1 D0 xCS CLK DI Note: The pins xCS,CLK,DI have internal pull -up resistors. Parameter Symbol MIN TYP MAX CLK Pulse width HIGH T6 100ns CLK Pulse width LOW T5 100ns xCS to first falling CLK - edge s etup time T1 50ns DIN to CLK setup time T3 50ns DIN to CLK hold time T4 50ns xCS CLK DIN t3 t4 t5 t6 ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 9 of 19 Serial interface Registers The following table shows the content of the 16 control registers. For a detailed description of the commands see Application note AN523/24. Control registers AS2523 A A A A D D D D 3 2 1 0 3 2 1 0 0 0 0 0 Nop na na 0 0 0 1 na na 0 0 1 0 na na 0 0 1 1 na na Conf Liv Llc1 Llc0 LLC1 LLC0: Line loss compensation setting 0 0 20mA-50mA 0 1 NO Line loss compensation 1 0 45-75mA 1 1 NO Line loss compensation 0 1 0 1 Burs Burl CT1 CT0 CT1 CT0: @RO @LS 0 0 -36dB -15dB TONE-confidence level 0 1 -30dB -9dB rel. to pin LS 1 0 -24dB -3dB 1 1 -18dB +3dB 0001 0001 0 1 1 0 x x x x Softclip-settings, Tx_comp_gain settings 1000 1000 tx_comp_gain Bit 1 tx_comp_gain Bit0 Soft-RX Soft-TX Bit1 Bit0 :Tx_comp_gain 0 0 +8dB 0 1 +11dB 1 0 +14dB 1 1 +17dB 0 1 1 1 Rxoffset Bit1 Rxoffset Bit0 Delay_10ms Bnon Bit1 Bit0: Rx-offset setting 0 0 0mV 0 1 12mV 1 0 40mV 1 1 100mV 0101 1100 1 0 0 0 16 gains Handsfree receive endgain 1111 1011 Data RXgain TXgain 0x0 -20dB -30dB Min. receive volume : : 0xF +0dB -50dB Max. receive volume 1 0 0 1 x x x x 0000 1100 off1 off0: BGN-offset 0 0 120mV 0 1 180mV 1 0 240mV 1 1 300mV off1 off0 Hfs1 Hfs0 Hfs1 HFs0: Speed of voice switching 0 0 max speed 0 1 1 0 1 1 min speed 1 0 1 0 16 gains Transmit gain [16], 16 steps, 1dB stepsize 0111 0111 Data HS-mode HF-mode 0x0 30dB 39dB : : : 0xF 45dB 54dB 1 0 1 1 16 gains Receive gain [16], 16 steps, 1dB stepsize 1111 1111 Data HS-mode HF-mode 0x0 -6dB 19dB : : : 0xF +9dB 34dB Address Data for AS2523, AS2524HF for AS2524 LH bond option Default value after reset 1 1 0 0 HP_on Rec_on Mute Tone 0100 1000 1 1 0 1 x x x x Mask, Lh, Hf, Hook Switch 0100 0101 Mask His Hf LH His HF LH: Hook functions 0 x x Power down 1 0 0 Handset 1 0 1 not allowed 1 1 0 Handsfree 1 1 1 Loudhearing 1 1 1 0 x x x x 0000 0001 Krat5 Test3 Test2 slow_rec slow_rec: fast change to TX, slow change to RX, no IDLE Krat5,Test3,Test2: For factory test only ! 1 1 1 1 x x x x Reset to defaults na na ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 10 of 19 Programming Guidelines for the AS2523 The AS2523 is programmed by means of a serial 8- bit shift register. MSB is clocked in first, LSB last. The first four bits (7,6,5,4) are the addresses of the registers, the last four bits (3,2,1,0) are the data bits. Each register has a default setting (see data sheet), which is set after power -up of the chip. The internal registers are RAM -cells. When the AS2523 loses VDD (as in on- hook state) it also loses the register contents. It i s therefore necessary to re- write the affected registers after each hook event. The register contents cannot be read, they can only be written. Registers need to be re -written after each power -up and after each hook event (handset / handsfree / on- hook). It is recommended to always initialize the chip with a “reset to defaults command” (Fx) first and then write the appropriate registers that need to be changed from the default setting. Alternatively, all registers (4 to 16) may be re- written in a bulk at each power -up and hook event (handset / handsfree / on- hook). This guarantees safe operation in case of unexpected loss of power during normal operation. Re- writing all registers also eases later software updates, as only register contents need to be changed, but no additional command lines need to be inserted. Example of a typical power -up sequence A typical power -up sequence will require the following programming. a) determine the cause of power -up (handset / handsfree mode) and set register D accordingly. Default = handset mode b) Set the LI voltage to 3.5V or 4.5V (default = 4.5V) and Line Loss Compensation (default = off) in register 4 c) Set the Confidence Tone level (e.g. the DTMF level which is audible in the handset) and path in register 5 Defa ult = off d) Set the required Tx and Rx gains in Registers A and B Default = 37dB Tx gain, 1dB Rx gain Additional settings in Handsfree mode Note: change the default settings only if necessary: a) A click- free startup can be achieved by starting up in handset mode (=default) and then switching to handsfree, once the chip has stabilized. b) Change the Tx comparator preamplifier gain in register 6 Default = 14dB c) Change the Receive DC offset and Background noise monitoring in Register 7 default = 0mV offset (higher val. puts more weight on Rx) switching delay default = on Background Noise Monitoring = on d) Set the speaker amplifier volume in register 8 Default = 0B e) Set the handsfree voice switching speed and Background Noise monitoring offset in regist er 9: default voice switching speed = 1ms/6dB (fastest) default BGN monitoring offset = 240mV (determines the Tx level required to switch from idle to Transmit) Additional settings during Flash During a Flash, the AS2523 should be powered down to avoid dis charge of VDD: Set the MASK bit (bit3 in register D) to 1 After the line current is restored, the MASK bit must be cleared again. Other settings do not need to be re -written, as VDD has not discharged. As a safety margin however, it is recommended to re -write all registers after a flash Additional settings during line breaks If a line -break -detection (brief interruption of the line while in off -hook state) is implemented, the same rules apply as for a Flash: set the MASK bit to 1 to avoid discharge of VDD. It is recommended to re- write all registers after a line -break, as a line break may take long enough to discharge VDD, even when the MASK bit was set. General Rules The serial interface may be programmed at any time, it does not affect the speech quality, e.g. if a register is overwritten with the same value. It is also possible to re- write all registers periodically. The register is static, therefore it can be clocked at any speed up to 5MHz. However, electromagnetic pulses on the clock and data lines may cause unwanted programming of the chip. It is therefore recommended to keep these lines short, filter them by a discrete lowpass filter and reduce the clock speed accordingly. ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 11 of 19 Parallel Interface on AS2524 and AS2524B Input Signal on Pin XPD xMute HF Mode 0 0 0 Power down 0 0 1 Power down 0 1 0 Power down 0 1 1 Power down 1 0 0 Tone mode 1 0 1 Tone mode 1 1 0 Handset mode 1 1 1 Handsfree mode Power down mode For low power consumption the analog part is turned off during activated power down mode. The Power down mode is used during Flash and Pulse dialing and for On -hook operation. Handset mode Speech mode is Handset mode (M1- M2, RO active; LO deactivated) Parameter AS2524 AS2524B LI Voltage 4.5V 4.5V LLC No LLC LLC high (45mA to 75mA) TX-Gain +37dB +43dB RX-Gain +7.5dB +7.5dB Rx-Softclip Off Off Tx -Softclip Off Off Tone Off Off Handsfree mode Speech mode is Handsfree mode (M3 -M4, RO active; LO active) Parameter AS2524 AS2524B LI Voltage 4.5V 4.5V LLC No LLC LLC high (45mA to 75mA) HF TX-Gain +46dB +52dB HF RX -Gain +34dB +34dB Rx-Softclip Off Off Tx -Softclip Off Off Tone Off Off BNM On On ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 12 of 19 Tone mode This mode is used to send DTMF and FSK data to the line. Speech mode is Tone mode (M1 -M2;M3 -M4 muted, Rx path muted, RO and LO acti ve) Parameter AS2524 AS2524B LI Voltage 4.5V 4.5V LLC No LLC LLC high (45mA to 75mA) Tone TX -Gain +14dB +14dB Confidence tone level -36dB@Ro – 15dB@Lo relative to Pin LS -36dB@Ro – 15dB@Lo rel ative to Pin LS Loudhearing AS2524 and AS2524B (feature only available as DIE) Speech mode is Loudhearing (M3- M4, RO active; LO activated). Loudhearing can be activated via a bond- option (see document “AS2523/24 Delivery as Dice”). Parameter AS2524 AS252 4B LI Voltage 4.5V 4.5V LLC No LLC LLC high (45mA to 75mA) TX-Gain +37dB +43dB RX-Gain +7.5dB +7.5dB Tone Off Off Slow_rec On On RECV pin Deactivated Deactivated Highpass 2000kHz (10nF from TXO ->TXV) 2000kHz (10nF from TXO ->TXV) Voice switching speed 120ms/6dB 120ms/6dB RX-Offset 300mV 300mV

Electrical characteristics

Electrical characteristics are measured with the Test Circuit application. Typical mean values will not be tested. Absolute maximum ratings Positive Supply Voltage -0.3V <= V DD <= 7V Input Current +/- 25mA Input Voltage (LS) -0.3V <= V in <= 12V Input Voltage (LI, CS) -0.3V <= V in <= 8V Input Voltage (STB, RI) -2V <= V in <= V DD +0.3V 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 (generated internally) 3V <= V DD <= 5V Operating Temperature -25°C to +70°C ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 13 of 19 DC characteristics ILine =15mA w/o operation of any additional external circuitry, unle ss other specified Symbol Parameter Conditions Min Type Max Units Test IDDS Operating Current Speech Mode 3 6 mA Y IDDH Operating Current Handsfree Mode 7 10 mA Y VLI Line Voltage LIVolt=0 Line Voltage LIVolt=1 15mA<=ILINE<=100mA 3.2 4.2 3.5 4.5 3.8 4.8 V V Y Y IOL Output Current, Sink CS,SS VOL=0.4V mA N Transmit characteristics I Line =15mA f=800Hz, default settings unless other specified Symbol Parameter Conditions Min Type Max Units Test AM1/2TX Transmit Gain M1/M2 → LS AS2524 AS2524B ZAC(syn)= 1000Ω +36.5 +42.5 dB dB Y Y AM3/4TX Transmit Gain M3/M4 → LS AS2524 AS2524B ZAC(syn) =1000Ω +45.0 +51 dB dB Y Y Atone TX Transmit Gain Tone → LS ZAC(syn) =1000Ω 12 +14dB 16 dB Y ∆ATX Variation with frequency f = 500Hz … 3.4kHz ±0.8 dB N AVRM12 Control range M1/M2 → LS 16 steps -7/+8 dBr N AVRM34 Control range M2/M4 → LS 16 steps -7/+8 dBr N THD Distortion VLS =0.25VRMS 2 % Y VAGC1 Soft Clip Level M1/M2 → LS at LS

2 VP N

M3/M4 → LS at LS tattack Attack time 70 us/6dB N tdecay Decay time 100 ms/6dB N ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 14 of 19 Symbol Parameter Conditions Min Type Max Units Test ZIN -M1/2 Input Impedance M1/M2 10 kΩ N ZIN -M3/4 Input Impedance M3/M4 10 kΩ N VINmax Input Voltage Range M1/2 - M3/4 differential ±1 Vp N VNO Noise Output Voltage LS TAMP =25°C Handset mode Gain = 36.5dB Gain = 42.5dB -72 -66 dBmp dBmp N Y AMUTE Mute Attenuation Mute activated 60 dB Y Receive characteristics ILine =15mA f=800Hz, default settings unless other specified Symbol Parameter Conditions Min Type Max Units Test ARO Receive Gain LS → RO ZAC(syn) =1000Ω Vol default 6 +7.5 9 dB Y ALO12 Receive Gain LS → LO ZAC(syn) =1000Ω Vol maximum +32.0 +34 +36.0 dB Y ∆ARX Variation with frequenc y f=500Hz to 3.4kHz ±0.8 dB N AVRRO Control range LS → RO 16 steps -7/+8 dBr N AVRLS Control range LS → LO 16 steps -7/+8 dBr N THD LS Distortion LO VLS =0.25VRMS 5 % Y THD RO Distortion RO VLS =0.25VRMS 2 % Y VUFC Unwanted Freq. Cmp. f = 200 … 20kHz -60 dBm Y VAGCRO Soft Clip Level RO

1 VP N

1.1 VP N

Tattack Attack time 70 us/6dB N Tdecay Decay time 100 ms/6dB N ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 15 of 19 Symbol Parameter Conditions Min Type Max Units Test VNO Noise Output Voltage RO TAMP =25°C Gain = 7.5 dB -68 dBmp Y ZIN -RI VINmax Input Imp. RI Input Voltage Range RI kΩ Vp N ZIN -STB VINmax Input Imp. STB Input Volt. Range STB kΩ Vp N ST Side tone VRI <=0.25VRMS 26 dB Y RL ∆ZAC/°C Return Loss Temp. Variation ZAC(syn) =1000Ω 18 0.5 dB Ω/°C Y Test circuit VSS R2 32R 1uF VSS VSS AS2523/24 15 28 RO RECI RECV LO xCS / xMUTE DI / xPD CLK / H FI CBN TXV TXO FT1 AGND VD D VPP SS VSSA VSS CI CS STB LI RI LS TONE IN C2 22uF 600R 10V VSS C6 100nF C6 100nF C6 100nFC2 1uF BC327 5V1 VSS Vac C2 1uF C6 100nF VSS 30R C2 10uF Vac VSS VSS VSS 100uF Vac VSS BC327 C6 100nF VSS C4 100nF VSS VSS VSS VSS C6 100nF Vac R3 150R C1 10uF 100uF Idc 47uF VSS 300R C7 100uF 10k 10k ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 16 of 19 Typical application AS2523 ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 17 of 19 Typical application AS2524 and AS2524B ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 18 of 19 Packaging 28- pin plastic SOIC For exact mechanical package dimensions please see austriamicrosystems AG packaging information. Pin-out, Marking YY year of production WW calendar week of production AAA austriamicrosystems AG assembly ID X 3 … AS2523 Version 4 … AS2524 Version 4B .. AS2524B Version

Ordering Information

Number Package Description AS2523 T SOIC28 plastic surface mounted package – 28 leads AS2524 T SOIC28 Plastic surface mounted package – 28 leads AS2524B T SOIC28 Plastic surface mounted package – 28 leads AS2523 F DOF Dice -on -Foil AS2524 F DOF Dice -on -Foil AS2524B F DOF Dice -on -Foil ams AG Technical content still valid

Data Sheet AS2523, AS2524, AS2524B austria micro systems Revision 1.13 Page 19 of 19 Copyright Copyright © 2002 -2007 , 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 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. 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 techni cal or other services. Contact Information Headquarters: austriamicrosystems AG Business Unit Communications A 8141 Schloss Premstätten, Austria T. +43 (0) 3136 500 0 F. +43 (0) 3136 5692 info@austriamicrosystems.com For Sales Offices, Distributors and Representatives, please visit: www.austriamicrosystems.com austriamicro systems – a leap ahead ams AG Technical content still valid