austriamicrosystems austriamicrosystems Data Sheet AS2540 Remote Controlled Single-Chip-Telephone AS2540 DATA SHEET (PRELIMINARY) General Description Key Features 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 - 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 Web Telephones Answering Machines Fax Machines Base Station of Cordless Telephones Hospital Communication Units - 28 pin SOIC Dice-on-Foil Block Diagram Main Power Mode Line Backup Mode Line LS LI LS LI + 6dB + 6dB ROH -2d B RI STB + 2d B ROT M1 M2 CS ROH -2dB RI STB + 2d B ROT M1 M2 CS Mask Mask TIT TIT CI CI DPn AGND DPn AGND SROT SROH STIT SMUTE SMASK SDPn SROT SROH STIT SMUTE Dia l Dig it SMASK SDPn Dial Digit DTMFg enerator DTMFgenerator RxD RxD DIALLER UART DIALLER TxD MODE VDD VDD RFD RFD Revision 3.1 TxD R1 R2 R1 R2 MODE MO VSS MO EHS OSC EHS MHS UART C1 C2 C3 C1 C2 C3 VSS OSC MHS Page 1 of 18 austriamicrosystems Data Sheet AS2540 Pin Description Pin # Symbol 15 RFD Function R ing F requency D iscrimination Schmitt trigger input for ring frequency discrimination. Disabled during off-hook. 7 LS L ine Current S ense Input Input for sensing the line current 5 LI L ine I nput Input used for power extraction and line current sensing 6 RI R eceive I nput Input for ac-separated receive signal 2 STB S ide T one B alance Input Input for side tone cancellation network 3 CS C urrent S hunt 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 8 CI C omplex I mpedance Input Input pin for the capacitor to program a complex impedance 16 DPn D ial P ulse Output Open drain output pulls low during break periods of pulse dialling and flash 17 EHS E lectronic H ook S witch Schmitt Trigger Input to detect an electronic off-hook. 18 MHS M anual H ook S witch Schmitt Trigger Input to detect a manual off-hook. 19 MODE D TMF L evel S election -4/-6dBm -6/-8dBm -8/-10dBm —> —> —> DLS open DLS-r1 DLS-r2 L ine L oss C ompensation Select Pin 45mA-75mA 20mA-50mA None 28 MO Ring —> —> —> LLC open LLC-r3 LLC-r4 M elody O utput PDM output of the ring melody generator. 11 VDD V oltage D rain D rain Positive Power Supply 4 VSS V oltage S ource S ource Negative Power Supply Revision 3.1 Page 2 of 18 austriamicrosystems Data Sheet AS2540 Pin # Symbol 25 OSC Function O scillator Input Input for ceramic resonator 3.58MHz. Recommended type: Murata CSA 3.58MG312AM or compatible 12 AGND A nalogue G round Special ground for the internal amplifiers 26 RXD R eceive D ata Input Schmitt trigger input to serial interface 27 TXD T ransmit D ata Output Open drain output from serial interface 20 21 R1 R2 Keyboard R ows 22 23 24 C1 C2 C3 Keyboard C olumns 10 ROT R eceive O utput to T ransformer Output for driving a transformer with an ac impedance larger than 10kΩ 1 TIT T ransformer I nput from T ransformer Single ended input for transformer 9 ROH R eceive O utput to H andset Output for driving a dynamic earpiece with an impedance from 150Ω to 300Ω 13 14 Revision 3.1 M2 M1 M icrophone Inputs Differential inputs for the microphone (electret) Page 3 of 18 austriamicrosystems Data Sheet AS2540 Example Main Power Mode Functional Description Line Modes of operation LS LI + 6dB There are 4 possible modes: RI STB Idle Mode CS + 2dB ROT M1 M2 Mask DPn AGND Ringing Mode SROT SROH STIT SMUTE RxD DIALLER 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. UART TxD C1 C2 C3 R1 R2 MODE VDD RFD MO EHS VSS OSC MHS Start-up in backup mode 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 Revision 3.1 Dial Digit DTMFgenerator SDPn is open (MHS ∩ EHS = logical 0), no ring signal is applied, the oscillator is stopped, signalling via the serial interface is not possible. TIT CI SMASK Manual hook-switch and electronic hook-switch (e.g. relay) Command Message <SetHandsetPath> <SetModemPath> <SetMonitorPath> ROH -2dB Switches ON SROH SROT & STIT SROH & SROT Switches OFF SROT & STIT STIT 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 Page 4 of 18 austriamicrosystems Data Sheet AS2540 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. The t.m. voltage at the LI pin is 4.5V. The calculation leads to the following DC resistances: 330Ω to 75Ω 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. Receive path The gain of the LS —> ROH receive path is set to 2dB for ac-impedance 1000Ω. 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 1000Ω. 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 MODE A1=3.4/3.5 A2=-0.4 R1 R2 AC impedance The ac impedance of AS2540 is set to t.m. 1000Ω. With the external capacitor at CI pin it can be programmed complex. With a parallel impedance at the LS pin it can be PIN C1 PIN C2 PIN C3 1 4 7 * 2 5 8 0 3 6 9 # c1 C2 PIN R1 PIN R2 C3 programmed to 600Ω. Side Tone A good sidetone cancellation can be achieved by using the following equation: C3 C2 C1 R2 R1 LLC Dtmf Level 45mA-75mA -6dBm 45mA-75mA -8dBm 45mA-75mA -10dBm 20mA-50mA -6dBm 20mA-50mA -8dBm X 20mA-50mA -10dBm X No LLC -6dBm No LLC -8dBm No LLC -10dBm Z BAL /Z LIN E = 10 X Transmit path X The gain of the M1/M2 —> LS transmit path is set to 38dB X for ac-impedance 1000Ω. The input is differential with an impedance of 25kΩ. 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. X X X The gain of the TIT —> LS transmit path is set to 8dB for ac-impedance 1000Ω. The input is single ended with an impedance of 25kΩ. The soft clip circuit is not active for this input. The dynamic range of this path is 2.5Vp at LS. X X X X X X X indicates connection to pin mode Revision 3.1 Page 5 of 18 austriamicrosystems Data Sheet AS2540 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 x x 0 1 0 1 0 1 Digit 0 Starts DTMF dialling of digit x x 0 0 0 0 1 1 Digit 1 Starts DTMF dialling of digit x x 0 0 0 1 0 1 Digit 2 Starts DTMF dialling of digit x x 0 0 0 1 1 1 Digit 3 Starts DTMF dialling of digit x x 0 0 1 0 0 1 Digit 4 Starts DTMF dialling of digit x x 0 0 1 0 1 1 Digit 5 Starts DTMF dialling of digit x x 0 0 1 1 0 1 Digit 6 Starts DTMF dialling of digit x x 0 0 1 1 1 1 Digit 7 Starts DTMF dialling of digit x x 0 1 0 0 0 1 Digit 8 Starts DTMF dialling of digit x x 0 1 0 0 1 1 Digit 9 Starts DTMF dialling of digit x x 0 1 0 1 1 1 Digit * Starts DTMF dialling of digit x x 0 0 0 0 0 1 Digit # Starts DTMF dialling of digit x x 0 1 1 0 0 1 Digit A Starts DTMF dialling of digit x x 0 1 1 0 1 1 Digit B Starts DTMF dialling of digit x x 0 1 1 1 0 1 Digit C Starts DTMF dialling of digit x x 0 1 1 1 1 1 Digit D Starts DTMF dialling of digit x x 1 0 0 0 0 1 KeyReleased Stops Dialling d7 d6 d5 d4 d3 d2 d1 d0 Pin-Control message x x 1 0 1 1 0 1 SetDPn_HIGH Release pin Dpn (open drain) x x 1 0 0 0 1 1 SetDPn_LOW Force pin DPn = VSS x x 1 0 0 1 0 1 SetMask Force LI-Voltage to 1.2 V x x 1 0 0 1 1 1 ResetMask Revision 3.1 Notes Notes Page 6 of 18 austriamicrosystems Data Sheet AS2540 d7 d6 d5 d4 d3 d2 d1 d0 Pin-Control message Notes x x 1 0 1 1 1 1 SetTestmode FOR FACTORY TEST ONLY x x 1 0 1 0 0 1 MuteON Mute Transmit path x x 1 0 1 0 1 1 MuteOFF d7 d6 d5 d4 d3 d2 d1 d0 Path-Control message x x 1 1 0 0 1 1 SetHandsetPath x x 1 1 1 0 1 1 SetMonitorPath x x 1 1 0 1 0 1 SetModemPath x x 1 1 0 0 0 1 RequestStatus AS2540 sends Status information x x 1 1 0 1 1 1 reserved <LineEvent> x x 1 1 1 0 0 1 reserved <LineEvent> x x 1 1 1 1 0 1 reserved <LineEvent> x x 1 1 1 1 1 1 reserved <LineEvent> Notes Tx messages <Ack> message <Ack> message format for <RequestStatus> b7 MSB b6 b5 b4 b3 b2 0 1 LSB b7 b6 b5 b4 b3 b2 b1 b0 Status 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) Revision 3.1 0 0 0 0 1 no LLC comparator ..................... 0 0 1 0 1 LLC comparator 20mA (45mA) ... 0 1 0 0 1 LLC comparator 26mA (51mA) ... 0 1 1 0 1 LLC comparator 32mA (57mA) ... 1 0 0 0 1 LLC comparator 38mA (63mA) ... 1 0 1 0 1 LLC comparator 44mA (69mA) ... 1 1 0 0 1 LLC comparator 50mA (75mA) ... Remark Status of AS2540 coded status of LLC comparator Page 7 of 18 austriamicrosystems Data Sheet AS2540 <Line Event> Message <LineEvent> message format b7 MSB b6 b5 1 1 1 1 1 LSB b7 b6 b5 b4 b3 b2 b1 b0 Status 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) Remark 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. Mode transitions Idle → BM → MPM → Idle 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 - Revision 3.1 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): 11 22 33 697+1209 697+1336 697+1477 44 55 66 770+1209 770+1336 770+1477 77 88 99 852+1209 852+1336 852+1477 ** 00 ## 941+1209 941+1336 941+1477 Page 8 of 18 austriamicrosystems Data Sheet AS2540 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 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 Ring frequency discrimination The ring frequency discrimination assures that only signals with a frequency between 13Hz and 70Hz are regarded as valid ring signals. PIN MODE R1 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. R2 PIN C1 PIN C2 PIN C3 1 4 7 * 2 5 8 0 3 6 9 # c1 C2 PIN R1 PIN R2 C3 Double contacts under keys 0-9*#: One contact is connected to AS2540, the other one to CPU. Revision 3.1 Page 9 of 18 Data Sheet AS2540 austriamicrosystems Timing diagrams (unscaled) Dialling - MF mode Revision 3.1 Page 10 of 18 austriamicrosystems Data Sheet AS2540 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 +/- 800V Electrostatic Discharge (HBM 1.5kΩ-100pF) 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 I Line =15mA w/o operation of SI through optocouplers, unless other specified Symbol Parameter Conditions I DD Operating Current Speech Mode Speech Mode with SI MF Dialling LD Dialling, V DD =2.5V Ring Mode, V DD =2.5V V LI Line Voltage 15mA<=I LINE <=100mA I OL Output Current, Sink CS, DPn, MO TXD V OL =0.4V V OL =10mA V OH =V DD -0.4V I OH Revision 3.1 Min 4.2 Typ Max Units Test 3 5 4 200 300 5 mA mA mA µA µA Y N N N N 4.5 4.8 V Y 1 10 mA mA N N -1 mA N Output Current, Source MO Page 11 of 18 austriamicrosystems Data Sheet AS2540 Transmit characteristics Symbol Parameter Conditions Min A MTX Transmit Gain M1/M2 —> LS Z AC(syn) =1000Ω +36.5 A TTX Transmit Gain TIT —> LS Z AC(syn) =1000Ω +6.5 THD Distortion V LS =0.25V RMS V AGC Soft Clip Level M1/M2 —> LS at LS A SCO Typ +38 Max +39.5 +8 Units dB Test Y +9.5 dB Y 2 % Y 2.0 VP N Soft Clip Overdrive M1/M2 20 dB N Z IN Input Impedance M1/M2 - TIT 20 kΩ N V NO Noise Output Voltage LS T AMP =25°C dBmp Y RL Return Loss Z AC(syn) =1000Ω 18 dB Y -72 Receive characteristics Symbol Parameter Conditions Min Typ Max Units Test A HRX Receive Gain LS —> ROH Z AC(syn) =1000Ω +0.5 +2 +3.5 dB Y A TRX Receive Gain LS —> ROT Z AC(syn) =1000Ω -3.5 -2 -0.5 dB Y Y THD Distortion V LS =0.25V RMS 2 % Y V AGC Soft Clip Level ROH 1 VP N A SCO Soft Clip Overdrive ROH 10 dB N V NO Noise Output Voltage ROH - ROT dBmp Y Z IN Input Imp. RI kΩ N ST Sidetone V RI <=0.25V RMS 24 dB Y RL Return Loss Z AC(syn) =1000Ω 18 dB Y Revision 3.1 T AMP =25°C -72 8 Page 12 of 18 austriamicrosystems Data Sheet AS2540 LD characteristics Symbol Parameter Conditions t(td) Flash Duration DPN pin status can be directly controlled via serial interface Min Typ Max Units Test Min Typ Max Units Test dBm Y 3.2 dB Y -40 -46 -52 -58 -70 -80 dBm dBm dBm dBm dBm dBm Y Y Y Y Y Y 1.2 % Y DTMF characteristics Symbol Parameter Conditions V MFlow Tone Level Low Group LS ∆V L-H Preemphasis L-H UFC Unwanted Frequency Components ∆f Frequency Deviation 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 V CT-H Comfort Tone (DTMF) dB N -6 2.0 2.6 300Hz - 4.3kHz 4.3kHz - 7kHz 7kHz - 10kHz 10kHz - 14kHz 14kHz - 28.5kHz 28.5kHz – 40kHz ROH rel. to LS -30 Ringer characteristics Symbol Parameter f1 Min Typ Max Units Test Frequency 1 770 800 830 Hz Y f2 Frequency 2 1025 1067 1110 Hz Y f3 Frequency 3 1280 1333 1385 Hz Y f MIN Min. Det. Frequency 12 13 14 Hz Y f MAX Max. Det. Frequency 68 70 75 Hz Y t DT Detection Time ms N Revision 3.1 Conditions Initially 102 Page 13 of 18 austriamicrosystems Data Sheet AS2540 Serial Interface Symbol Parameter Conditions t RXD-r RXD signal rise time V dd =4V,R Pull-up =1.2kΩ t RXD-f RXD signal fall time V comp Input comparator level at RXD BR RXD RXD baud rate BR TXD TXD baud rate Min Typ Max Units Test 30 µs N 30 µs N V dd /2 V N +/-2% 9600 bps N +/-2% 9600 bps Y Units Test 15 ms N 2400 ms N Miscellaneous Symbol Parameter tD Key Debouce Time t time-out Watch-dog Timer Revision 3.1 Conditions Min Typ Max Page 14 of 18 Data Sheet AS2540 austriamicrosystems Typical Application Revision 3.1 Page 15 of 18 austriamicrosystems Data Sheet AS2540 Test Circuit U1 R1 C1 15 M1 RFD 13 R2 100n 330k AC 1k C2 M2 7 ROH 6 9 140 RI C4 100u 10u 5 C5 100n LI TIT 30 R7 2 ROT STB 10 1u 9k C11 C8 10u D1 10n AC 100 C7 100u R8 600 R5 1 R6 300 C6 100n R3 LS C3 R4 14 Q1 BC327 10V 3 ILine 8 AC CS AS2540 C3 C2 CI R9 6k C1 R1 R2 16 R10 17 R11 18 330k MODE 23 22 20 21 19 DPn EHS MHS TxD 330k 27 26 OSC AGND 25 4 12 VSS MO VDD RxD 11 28 24 AS2540 D2 Y1 5V6 Revision 3.1 C9 100u C10 22u 3.58MHz Page 16 of 18 austriamicrosystems Data Sheet AS2540 Packaging Ordering Information 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 Max. Body Width Pitch 18.1mm / 713mil 7.6mm / 300mil 1.27mm / 50mil Pin-out 1 2 3 4 5 6 7 8 9 10 11 12 13 14 – – – – – – – – – – – – – – TIT STB CS VSS LI RI LS CI ROH ROT VDD AGD M1 M2 MO TxD RxD OSC C3 C2 C1 R2 R1 MODE MHS EHS DPn RFD Marking YYWWAAA AS2540 Austria YY WW AAA year of production calendar week of production ams AG assembly ID Revision 3.1 – – – – – – – – – – – – – – 28 27 26 25 24 23 22 21 20 19 18 17 16 15 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. Page 17 of 18 austriamicrosystems Data Sheet AS2540 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 USA (east) austriamicrosystems Germany GmbH Tegernseer Landstrasse 85 D-81539 München, Germany Phone: +49/89/693643-0 Fax: +49/89/693643-66 austriamicrosystems USA, Inc. Suite 400, 8601 Six Forks Road Raleigh, NC 27615, USA Phone: +1/919/676 5292 Fax: +1/919/676 5305 France United Kingdom 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 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 Italy Japan austriamicrosystems Italy S.r.l. Via Leone Tolstoi, 64 I-20146 Milano, Italy Phone: +39/0242/36713 Fax: +39/0242/290889 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 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 Revision 3.1 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. Page 18 of 18