AS2540Q

ams AG

Remote Controlled Single-Chip-Telephone

Manufacturer: ams AG

Document: 18 Pages / 248Kb

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AS2540 AMSCO | Alldatasheet

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Data Sheet AS2540 austria micro systems Revision 3.1 Page 1 of 18 austria micro systems General Description The AS2540 is a CMOS integrated circuit that incorporates a speech circuit (line-adaptation, 2/4-wire conversion, separate Rx- and Tx-amplifiers for handset and modem), MF dialler, ring frequency detector, ring melody generator and a two wire serial interface. It shall act as an a/b-line-powered device in order to interface a main-powered CPU to the analogue telephone line. AS2540 can operate in a so-called mainpower mode and in a backup mode. During mainpower mode, a watchdog timer is running on AS2540, which has to be reset via the serial interface, which is connected to the CPU through opto-couplers. During backup mode (= The main-power failure or SW engine problem), AS2540 can operate as an independent basic MF dialler (digits 0-9*#)

Applications

Web Telephones - Answering Machines - Fax Machines - Base Station of Cordless Telephones - Hospital Communication Units Key Features - Line Interface, Speech Circuit, MF Dialler and Tone Ringer on a 28 pin CMOS chip - Programmable via 2-wire serial interface (UART 9600 baud, 8N1) - Watch dog timer for Backup Mode - Additional input for modem transmit path - Additional output for modem receive path - CMOS for high EMC immunity - Low Noise (max. –72 dBm) - Operating range from 15mA to 100mA (down to 5mA with reduced performance) - Soft clipping for handset operation to avoid harsh distortion - Line loss compensation selectable by pin option - Real and complex impedance selectable by external components - Side tone adaption selectable by external components - Ring frequency discrimination - 3-tone ring melody generator Package - 28 pin SOIC - Dice-on-Foil Block Diagram LS RO H RO T TI T AGND Line LI RI STB CS CI DPn MODE RFD -2d B +6 d B +2 d B Mask DTMF - gener ator DIALLER UART STIT SRO H SRO T SM UTE Dia l Dig it SM A SK SD Pn MO RxD TxD VDD EHS MH S VSS OS C Main Power Mode LS RO H RO T TIT AGND Line LI RI STB CS CI DPn MODE RFD -2dB +6 d B +2 d B Mask DT MF- gener ator DIALLER UART STIT SRO H SRO T SM UTE Dial Digit SMAS K SDP n MO RxD TxD VDD EHS MHS VSS OS C Backup Mode Remote Controlled Single-Chip-Telephone AS2540 DATA SHEET (PRELIMINARY)

Data Sheet AS2540 austria micro systems Revision 3.1 Page 2 of 18 Pin Description Pin # Symbol Function

15 RFD Ring Frequency Discrimination

Schmitt trigger input for ring frequency discrimination. Disabled during off-hook. 7L S Line Current Sense Input Input for sensing the line current 5L I Line Input Input used for power extraction and line current sensing 6R I Receive Input Input for ac-separated receive signal 2S T B Side Tone Balance Input Input for side tone cancellation network 3C S Current Shunt Control Output N-channel open drain output to control the external high power shunt transistor for synthesising ac- and dc- impedance, modulation of line voltage and shorting the line during make periods of pulse dialling 8C I Complex Impedance Input Input pin for the capacitor to program a complex impedance

16 DPn Dial Pulse Output

Open drain output pulls low during break periods of pulse dialling and flash

17 EHS Electronic Hook Switch

Schmitt Trigger Input to detect an electronic off-hook.

18 MHS Manual Hook Switch

Schmitt Trigger Input to detect a manual off-hook.

19 MODE DTMF Level Selection

-4/-6dBm —> DLS open -6/-8dBm —> DLS-r1 -8/-10dBm —> DLS-r2 Line Loss Compensation Select Pin 45mA-75mA —> LLC open 20mA-50mA —> LLC-r3 None —> LLC-r4

28 MO Ring Melody Output

PDM output of the ring melody generator.

11 VDD Voltage Drain Drain

4 VSS Voltage Source Source

Data Sheet AS2540 austria micro systems Revision 3.1 Page 3 of 18 Pin # Symbol Function

25 OSC Oscillator Input

Input for ceramic resonator 3.58MHz. Recommended type: Murata CSA 3.58MG312AM or compatible

12 AGND Analogue Ground

Special ground for the internal amplifiers

26 RXD Receive Data Input

Schmitt trigger input to serial interface

27 TXD Transmit Data Output

Open drain output from serial interface Keyboard Rows Keyboard Columns

10 ROT Receive Output to Transformer

Output for driving a transformer with an ac impedance larger than 10k Ω 1T I T Transformer Input from Transformer Single ended input for transformer 9R O H Receive Output to Handset Output for driving a dynamic earpiece with an impedance from 150 Ω to 300 Ω Microphone Inputs Differential inputs for the microphone (electret)

Data Sheet AS2540 austria micro systems Revision 3.1 Page 4 of 18 Functional Description Modes of operation There are 4 possible modes: Idle Mode Manual hook-switch and electronic hook-switch (e.g. relay) is open (MHS ∩ EHS = logical 0), no ring signal is applied, the oscillator is stopped, signalling via the serial interface is not possible. Ringing Mode AS2540 is supplied via the ring capacitor and external path, manual hook -switch and electronic hook-switch is open (MHS ∩ EHS = logical 0), the oscillator is running, a valid incoming ringing is signalled via the serial interface to the CPU. If the CPU does not reply the AS2540 switches into backup mode and sends a ring melody to the MO output. Backup Mode Manual hook-switch and/or electronic hook-switch is closed (MHS ∪ EHS = logical 1), AS2540 is supplied with line current, the oscillator is running, the keyscan is enabled and the handset path is switched on, signalling via the serial interface is possible. After AS2540 has started dialling in backup mode, he must not be interrupted any more in order to ensure consistent dialling. A mode transition BM -> MPM is only possible before AS2540 has started dialling digits independently. Main Power Mode Manual hook-switch and/or electronic hook-switch is closed, AS2540 is supplied with line current (MHS ∪ EHS = logical 1), the oscillator is running, the keyscan is disabled, AS2540 is controlled via the serial interface, handset path or monitor path or modem path is on, signalling via the serial interface is possible. Select Operation Mode Command Message Switches ON Switches OFF <SetHandsetPath> SROH SROT & STIT <SetModemPath> SROT & STIT <SetMonitorPath> SROH & SROT STIT Example Main Power Mode LS ROH ROT TIT AGND Line LI RI STB CS CI DP n MODE RFD -2dB +6 d B +2 d B Mask DTMF - gener ator DIALLER UART STIT SRO H SROT SM UTE Dia l Digit SM A SK SD Pn MO RxD TxD VDD EHS MHS VSS OS C Start-up in backup mode As soon as AS2540 is supplied with line current, the external V dd capacitor will be charged up via the LI and VDD pin and after the V dd voltage has reached the operating level, the handset path of the speech circuit is switched on. This off-hook status is also signalled to the internal logic via the MHS or EHS pin in order to start the pinscan and subsequently set the country specific modes. Additionally a <LineEvent> message is sent to the CPU. Start-up in ring mode When a ringing signal is applied to the line, V dd of AS2540 is charged up via an external path. After V dd has reached the operating voltage the oscillator starts and AS2540 discriminates the ring frequency. After a valid ring frequency is applied on the RFD pin, the logic sends a <LineEvent> message is sent to the CPU and a watchdog timer is started. When the <LineEvent> message is not quit by the CPU before the watchdog timer has finished the countdown, AS2540 changes into backup mode and sends out a melody via the MO pin. 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 and the voltage at LI is reduced to a maximum of 3.5V

Data Sheet AS2540 austria micro systems Revision 3.1 Page 5 of 18 The DC characteristic is determined by the voltage at LI pin and a 30 Ω resistor between LI and LS pin. It can be calculated by the following equation: V LS = V LI + I Line * leads to the following DC resistances: 330 Ω to 75 Ω at line currents from 15mA to 100mA. 2/4 wire conversion AS2540 has a built-in dual Wheatstone bridge 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. A1=3.4/3.5 A2=-0.4 AC impedance The ac impedance of AS2540 is set to t.m. 1000 Ω . With the external capacitor at CI pin it can be programmed complex. With a parallel impedance at the LS pin it can be programmed to 600 Ω . Side Tone A good sidetone cancellation can be achieved by using the following equation: ZBAL /ZLINE = 10 Transmit path The gain of the M1/M2 —> LS transmit path is set to 38dB for ac-impedance 1000 Ω . The input is differential with an impedance of 25k Ω . The soft clip circuit limits the output voltage at LS to 2V p. The attack time is 30µs/6dB and the decay time is 20ms/6dB. The gain of the TIT —> LS transmit path is set to 8dB for ac-impedance 1000 Ω . The input is single ended with an impedance of 25k Ω . The soft clip circuit is not active for this input. The dynamic range of this path is 2.5Vp at LS. Receive path The gain of the LS —> ROH receive path is set to 2dB for ac-impedance 1000 Ω . The receive input is the differential signal of RI and STB. During DTMF dialling a MF comfort tone is applied to ROH which is -30dB relative to the line level. The soft clip circuit limits the output voltage at ROH to 1V p. It prevents harsh distortion and acoustic shock. The gain of the LS —> ROT receive path is set to 0dB for ac-impedance 1000 Ω . The receive input is the differential signal of RI and STB. The soft clip circuit is not active for this output. Modescan The DTMF-level on the line and the function of the line loss compensation can be selected with the connection of the MODE-pin to the keyboard matrix. The MODE-pin is scanned once after each OFF-Hook transition. PIN 456 789 *0# PIN PIN PIN PIN PIN MODE c1 C2 C3 C3 C2 C1 R2 R1 LLC Dtmf Level 45mA-75mA -6dBm XX 45mA-75mA -8dBm X 45mA-75mA -10dBm X 20mA-50mA -6dBm X 20mA-50mA -8dBm XX 20mA-50mA -10dBm XX No LLC -6dBm XX No LLC -8dBm XXX No LLC -10dBm X indicates connection to pin mode

Data Sheet AS2540 austria micro systems Revision 3.1 Page 6 of 18 Serial interface The communication principle is derived from a standard UART: - Baud Rate 9600 - Start Bit 1 - Data Bits 8 - Parity None - Stop Bit 1 - LSB is transferred prior to MSB Rx - messages Message Format X MSB X d5 d4 d3 d2 d1 1 LSB d7 d6 d5 d4 d3 d2 d1 d0 DTMF-dial message Notes xx 01010 1 Digit 0 Starts DTMF dialling of digit xx 00001 1 Digit 1 Starts DTMF dialling of digit xx 00010 1 Digit 2 Starts DTMF dialling of digit xx 00011 1 Digit 3 Starts DTMF dialling of digit xx 00100 1 Digit 4 Starts DTMF dialling of digit xx 00101 1 Digit 5 Starts DTMF dialling of digit xx 00110 1 Digit 6 Starts DTMF dialling of digit xx 00111 1 Digit 7 Starts DTMF dialling of digit xx 01000 1 Digit 8 Starts DTMF dialling of digit xx 01001 1 Digit 9 Starts DTMF dialling of digit xx 01011 1 Digit * Starts DTMF dialling of digit xx 00000 1 Digit # Starts DTMF dialling of digit xx 01100 1 Digit A Starts DTMF dialling of digit xx 01101 1 Digit B Starts DTMF dialling of digit xx 01110 1 Digit C Starts DTMF dialling of digit xx 01111 1 Digit D Starts DTMF dialling of digit xx 10000 1 KeyReleased Stops Dialling d7 d6 d5 d4 d3 d2 d1 d0 Pin-Control message Notes xx 10110 1 SetDPn_HIGH Release pin Dpn (open drain) xx 10001 1 SetDPn_LOW Force pin DPn = VSS xx 10010 1 SetMask Force LI-Voltage to 1.2 V xx 10011 1R e s e t M a s k

Data Sheet AS2540 austria micro systems Revision 3.1 Page 7 of 18 d7 d6 d5 d4 d3 d2 d1 d0 Pin-Control message Notes xx 10111 1 SetTestmode FOR FACTORY TEST ONLY xx 10100 1 MuteON Mute Transmit path xx 10101 1 MuteOFF d7 d6 d5 d4 d3 d2 d1 d0 Path-Control message Notes xx 11001 1 SetHandsetPath xx 11101 1 SetMonitorPath xx 11010 1 SetModemPath xx 11000 1 RequestStatus AS2540 sends Status information xx 11011 1 reserved <LineEvent> xx 11100 1 reserved <LineEvent> xx 11110 1 reserved <LineEvent> xx 11111 1 reserved <LineEvent> Tx messages <Ack> message <Ack> message format for <RequestStatus> MSB b6 b5 b4 b3 b2 01 LSB b7 b6 b5 b4 b3 b2 b1 b0 Status Remark 1 0 1 valid ring signal detected 0 0 1 no ring signal 1 0 1 manual hook switch - off-hook (pin MHS) 0 0 1 manual hook switch - on-hook (pin MHS) 1 0 1 electronic hook switch - off-hook (pin EHS) 0 0 1 electronic hook switch - on-hook (pin EHS) Status of AS2540 001 0 1 LLC comparator 20mA (45mA) ... 010 0 1 LLC comparator 26mA (51mA) ... 011 0 1 LLC comparator 32mA (57mA) ... 100 0 1 LLC comparator 38mA (63mA) ... 101 0 1 LLC comparator 44mA (69mA) ... 110 0 1 LLC comparator 50mA (75mA) ... coded status of LLC comparator

Data Sheet AS2540 austria micro systems Revision 3.1 Page 8 of 18 <Line Event> Message <LineEvent> message format MSB b6 b5 11111 LSB b7 b6 b5 b4 b3 b2 b1 b0 Status Remark 1 1 1 1 10 1 valid ring signal detected 0 1 1 1 10 1 no ring signal 1 1 1 1 10 1 manual hook switch - off-hook (pin MHS) 0 1 1 1 10 1 manual hook switch - on-hook (pin MHS) 1 1 1 1 10 1 electronic hook switch - off-hook (pin EHS) 0 1 1 1 10 1 electronic hook switch - on-hook (pin EHS) Status of AS2540 Protocol Line Events AS2540 has 3 inputs, namely MHS (Manual Hook Switch), EHS (Electronic Hook Switch) and RFD (Ring Frequency Detector), which sense the state of the two hook-switches and discriminate an applied ring signal. The MHS is connected to the manual hook switch which is operated by the handset and the EHS is connected to an electronic hook switch which is operated by the CPU. Whenever the state of these inputs changes, AS2540 immediately sends <LineEvent> to the CPU after a debounce time. MHS and EHS up-debouncing lasts 15ms, down-debouncing lasts 85ms. RFD start to discriminate the ring frequency immediately but will send a <LineEvent> message with a delay of 102ms. A status change of MHS and EHS pins must not change the momentary selected path of the speech network. The <LineEvent>-message is sent without consideration of the momentary activities of AS2540 in order to meet PTT requirements (e.g. line break signalling). The code for the <LineEvent>-message is chosen with regard to the minimum current consumption in order to operate the optocouplers. Pending <Ack>-messages will be queued after the <LineEvent>-message. An already running transmissions of <Ack> will not be interrupted and <LineEvent> will be sent afterwards in this case. AS2540 always starts up in backup mode and is prepared to act like an independent dialler. <LineEvent> is sent to the CPU and AS2540 remains in back-up mode until any valid message is sent from the CPU. This makes sure that a non-operable CPU does not disable basic dialling functions. - Mode transition MPM →→→→ BM A watchdog timer is started after <LineEvent> and is reset whenever AS2540 receives a message from the CPU via the serial interface. If the CPU does not send any further valid message within 2400ms, AS2540 goes back into back-up mode, immediately locks the UART and remains in backup mode till next on-hook. Dialling Functions DTMF The DTMF generator provides 8 frequencies (in Hz): 111 697+1209 222 697+1336 333 697+1477 444 770+1209 555 770+1336 666 770+1477 777 852+1209 888 852+1336 999 852+1477 *** 941+1209 000 941+1336 ### 941+1477

Data Sheet AS2540 austria micro systems Revision 3.1 Page 9 of 18 The MF output levels are set to -4/-6dB which should allow efficient backup dialling under all line conditions. The TONE/PAUSE ratio is 90ms/90ms. The preemphasis between low group and high group frequencies is t.m. 2.6dB. FLASH timing CPU can control the DPn pin and the MASK-mode of AS2540 via serial interface. Tone Ringer Ring frequency discrimination The ring frequency discrimination assures that only signals with a frequency between 13Hz and 70Hz are regarded as valid ring signals. When a valid ring signal is present for 102ms continuously, the ring melody generator is activated and remains active as long as a valid ring signal is present. Once the ring melody generator has started, the ring signal is continuously monitored and the ring melody generator is instantly turned off according to the momentary presence of a valid or invalid ring signal until next off-hook. Toner ringer melody The 3 basic melody frequencies are: - F1=880Hz - F2=1067Hz - F3=1333Hz The repetition rate is set to 4 which means that the sequence of F1, F2, F3, F1, F2, F3 is repeated 4 times within a second. Keyboard connections PIN 456 789 *0# PIN PIN PIN PIN PIN MODE c1 C2 C3 Double contacts under keys 0-9*#: One contact is connected to AS2540, the other one to CPU.

Data Sheet AS2540 austria micro systems Revision 3.1 Page 10 of 18 Timing diagrams (unscaled) Dialling - MF mode

Data Sheet AS2540 austria micro systems Revision 3.1 Page 11 of 18

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 <= 10V 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) +/- 800V Storage Temperature -65°C to +125°C Recommended operating conditions Supply Voltage (generated internally) 3.6V <= V DD <= 5V Oscillator Frequency Resonator Murata CSA 3.58MG312AM 3.58MHz Operating Temperature -15°C to +60°C DC characteristics ILine =15mA w/o operation of SI through optocouplers, unless other specified Symbol Parameter Conditions Min Typ Max Units Test IDD Operating Current Speech Mode Speech Mode with SI MF Dialling LD Dialling, V DD =2.5V Ring Mode, V DD =2.5V 200 300 5m A mA mA µA µA Y N N N N VLI Line Voltage 15mA<=I LINE <=100mA 4.2 4.5 4.8 V Y IOL Output Current, Sink CS, DPn, MO TXD V OL =0.4V VOL =10mA mA mA N N IOH Output Current, Source MO VOH =VDD -0.4V -1 mA N

Data Sheet AS2540 austria micro systems Revision 3.1 Page 12 of 18 Transmit characteristics Symbol Parameter Conditions Min Typ Max Units Test AMTX Transmit Gain M1/M2 —> LS ZAC(syn) =1000 Ω +36.5 +38 +39.5 dB Y ATTX Transmit Gain TIT —> LS ZAC(syn) =1000 Ω +6.5 +8 +9.5 dB Y THD Distortion V LS =0.25V RMS 2%Y VAGC Soft Clip Level M1/M2 —> LS at LS

2.0 V P N

20 kΩ N VNO Noise Output Voltage LS TAMP =25°C -72 dBmp Y RL Return Loss ZAC(syn) =1000 Ω 18 dB Y Receive characteristics Symbol Parameter Conditions Min Typ Max Units Test AHRX Receive Gain LS —> ROH ZAC(syn) =1000 Ω +0.5 +2 +3.5 dB Y ATRX Receive Gain LS —> ROT ZAC(syn) =1000 Ω -3.5 -2 -0.5 dB Y Y THD Distortion V LS =0.25V RMS 2%Y VAGC Soft Clip Level ROH P N ASCO Soft Clip Overdrive ROH 10 dB N VNO Noise Output Voltage ROH - ROT TAMP =25°C -72 dBmp Y ZIN Input Imp. RI 8 kΩ N ST Sidetone V RI <=0.25V RMS 24 dB Y RL Return Loss ZAC(syn) =1000 Ω 18 dB Y

Data Sheet AS2540 austria micro systems Revision 3.1 Page 13 of 18 LD characteristics Symbol Parameter Conditions Min Typ Max Units Test t(td) Flash Duration DPN pin status can be directly controlled via serial interface DTMF characteristics Symbol Parameter Conditions Min Typ Max Units Test VMFlow Tone Level Low Group LS -6 dBm Y ∆ VL-H Preemphasis L-H 2.0 2.6 3.2 dB Y UFC Unwanted Frequency Components 300Hz - 4.3kHz 4.3kHz - 7kHz 7kHz - 10kHz 10kHz - 14kHz 14kHz - 28.5kHz 28.5kHz – 40kHz -40 -46 -52 -58 -70 -80 dBm dBm dBm dBm dBm dBm Y Y Y Y Y Y ∆ f Frequency Deviation 1.2 % Y t(td) Tone Duration 80 82.3 85 ms Y t(itp) Inter Tone Pause 80 82.3 85 ms Y t(mo) Mute Overhang 6 ms Y VCT-H Comfort Tone (DTMF) ROH rel. to LS -30 dB N Ringer characteristics Symbol Parameter Conditions Min Typ Max Units Test f1 Frequency 1 770 800 830 Hz Y f2 Frequency 2 1025 1067 1110 Hz Y f3 Frequency 3 1280 1333 1385 Hz Y fMIN Min. Det. Frequency 12 13 14 Hz Y fMAX Max. Det. Frequency 68 70 75 Hz Y tDT Detection Time Initially 102 ms N

Data Sheet AS2540 austria micro systems Revision 3.1 Page 14 of 18 Serial Interface Symbol Parameter Conditions Min Typ Max Units Test tRXD-r RXD signal rise time Vdd =4V,R Pull-up =1.2k Ω 30 µs N tRXD-f RXD signal fall time 30 µs N Vcomp Input comparator level at RXD Vdd /2 V N BRRXD RXD baud rate +/-2% 9600 bps N BRTXD TXD baud rate +/-2% 9600 bps Y Miscellaneous Symbol Parameter Conditions Min Typ Max Units Test tD Key Debouce Time 15 ms N ttime-out Watch-dog Timer 2400 ms N

Data Sheet AS2540 austria micro systems Revision 3.1 Page 15 of 18 Typical Application

Data Sheet AS2540 austria micro systems Revision 3.1 Page 16 of 18 Test Circuit 10u AC 100R6 300 100u R11 330k 100u 3.58MHz 100n R10 330k 10V AC 5V6 C11 10n ILine AS2540 RFD LS LI RI STB CS CI DPn EHS MHS MO VDD VSS OSC AGND RxD TxD MODE ROT TIT ROH C5 100n 10uR8 600 330k BC327 100u AC 100n 140 AS2540 C10 22u

Data Sheet AS2540 austria micro systems Revision 3.1 Page 17 of 18 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-out 1– T I T M O– 2 8 2– S T B T x D– 2 7 3 – CS RxD – 26 4 – VSS OSC – 25 5– L I C 3– 2 4 6 – RI C2 – 23 7– L S C 1– 2 2 8 – CI R2 – 21 9– R O H R 1– 2 0 10 – ROT MODE – 19 11 – VDD MHS – 18 12 – AGD EHS – 17 13 – M1 DPn – 16 14 – M2 RFD – 15 Marking YYWWAAA AS2540 Austria YY year of production WW calendar week of production AAA ams AG assembly ID

Ordering Information

Number Package Description AS2540T SOIC28 plastic small outline package - 28 leads (suffix T) AS2540Q Dice-on-Foil dice 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.

Data Sheet AS2540 austria micro systems Revision 3.1 Page 18 of 18 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.

Product Information

AS2540Q specifications and overview.

Summary

Remote Controlled Single-Chip-Telephone

Description

Remote Controlled Single-Chip-Telephone

Source title AS2540Q Datasheet(PDF) - ams AG

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