austriamicrosystems Telephone Line Interface and Speakerphone Circuit AS2522B Key Features - Line/Speech circuit, DTMF dialer, FSK transmitter and tone ringer on a 32-pin CMOS-IC Enhanced voice switching Background noise monitoring DTMF tone generator FSK Transmitter V.23, BELL202, V.21, BELL 103 Ringer tone programmable Tx- and Rx-gain programmable Digital volume control of Rx signals DC characteristic programmable Dual softclipping in handset mode Tx-softclipping in handsfree mode Common monitor amplifier for loudhearing, handsfree and ringing Supply voltage generation for external circuitry Automatic line loss compensation (LLC) 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 DATA SHEET General Description AS2522 is a CMOS integrated circuit that incorporates DC and AC line adaptation (DC-mask and synthesized ACimpedance of 1000Ω) as well as a speech circuit with softclipping, line loss compensation and Rx-volume control for handset and handsfree operation. It shall act as an a/bline powered device, which is controlled by a CPU via a serial interface. Furthermore the AS2522 incorporates a DTMF, FSK transmitter, single tone and ringer tone generator. AS2522 allows to use an off-the-shelf microprocessor without special blocks and functions for telephone applications. DTMF, FSK transmitter, single tone and ringer tone generator can be controlled via the serial interface as well as the gain settings in handset and handsfree mode. Applications Enhanced handsfree feature phones with CallerID and extended displays. Package Available in 32-pin TQFP Block Diagram Revision 3.4 Page 1 of 19 austriamicrosystems Data Sheet AS2522B Pin description Pin # Symbol 13 LS Function L ine Current S ense Input Analog input for sensing the line current 10 LI L ine I nput Analog input used for power extraction and line current sensing 11 RI R eceive I nput Analog input for ac-separated receive signal 7 STB S ide T one B alance Input Analog input for side tone cancellation network 8 CS C urrent S hunt 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 14 CI C omplex I mpedance Input Analog input pin for the capacitor to program a complex impedance 12 SS S upply S ource 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 9 VSS V oltage S ource S ource Negative Analog Power Supply 18 VDD V oltage D rain D rain Positive Analog Power Supply 19 AGND A nalog G round Special ground for the internal amplifiers 6 M1 M icrophone Input 1 Differential input for the handset microphone (electret) 4 M2 M icrophone Input 2 Differential input for the handset microphone (electret) 5 M3 M icrophone Input 3 Differential input for the handsfree microphone (electret) 3 M4 M icrophone Input 4 Differential input for the handsfree microphone (electret) 17 RO R eceive O utput to H andset Output for driving a dynamic earpiece with an impedance from 150Ω to 300Ω 31 OSC O scillator Input Input for ceramic resonator 3.58MHz. Revision 3.4 Page 2 of 19 austriamicrosystems Data Sheet AS2522B Pin # Symbol Function 22 VPP Loudspeaker Power Supply High power supply for the output driver stage 21 CM C onverter M ake Output This is an output for controlling the external switching converter. During ringing it converts the ring signal into a 4V supply voltage 27 xCS C hip S elect Chip select input of the serial interface. Internal pull-up resistor ( 100kOhm ) 29 DI D ata I nput Data input of the serial interface. Internal pull-up resistor ( 100kOhm ) 30 CLK Cl oc k Clock input of the serial interface. Internal pull-up resistor ( 100kOhm ) 28 DO D ata O utput Data output of the serial interface. If xCS=1 DO is in HI-Z state 24 23 LO1 LO2 L oudspeaker O utput 1 and 2 1 FT1 Analog input pin for connecting a capacitor for offset cancellation. 2 FT2 Analog input pin for connecting a capacitor for offset cancellation. 20 CBN Analog input pin for connecting a capacitor for background noise monitoring. 15 RECI Analog input for the handsfree receive path. Should be connected to RO via coupling capacitor. 16 RECV Analog input for receive voice switching path. 25 VSSA Power supply pin for LS1-LS2 output amplifier. 32 VSSD V oltage S ource S ource D igital Output pins for a 50Ω loudspeaker Negative Digital Power Supply 26 VDDD V oltage D rain D rain D igital Positive Digital Power Supply Revision 3.4 Page 3 of 19 Data Sheet AS2522B austriamicrosystems Detailed Block Diagram Revision 3.4 Page 4 of 19 austriamicrosystems Data Sheet AS2522B Functional Description limits the output voltage at RO to 1V p. It prevents harsh distortion and acoustic shock. There is LLC for this path. DC conditions The gain of the LS → LO1/LO2 receive path is set to +29dB. This gain can be changed by programming from +22dB to -37dB in 1dB steps. The user can also change the gain via Register VOL (See section "Handsfree"). The receive input is the differential signal of RI and STB. The soft clip circuit limits the output voltage at LO1 of LO2 to 1V p. It prevents harsh distortion and acoustic shock. There is optional LLC for this path. 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 LIpin 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 AS2522 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 ACimpedance. AC-impedance The AC-impedance of AS2522 is set to t.m. 1000Ω. With the external capacitor at CI-pin it can be programmed complex. With an external resistor of approx. 1.5kΩ connected to the LS-pin it can be programmed to 600Ω. Side Tone Line Loss Compensation The line loss compensation is programmable (Register 0x0C). 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 from 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 VOL between 0dB and -20dB. The following table shows how voice switching is controlled A good side tone cancellation can be achieved by using the following equation: Z BAL /Z LINE = 10 Transmit path The gain of the M1/M2 → LS is set to +37dB. This gain can be changed by programming from +30dB to +45dB in 1dB steps (Register Txgain). The input is differential with an impedance of 10kΩ. 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. The input is differential with an impedance of 10kΩ. 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 +1dB. This gain can be changed by programming from -6dB to +9dB in 1dB steps (Register Rxgain). The receive input is the differential signal of RI and STB. The soft clip circuit Revision 3.4 Page 5 of 19 austriamicrosystems Data Sheet AS2522B voice switching circuit TX_atten RX Voice switching speech Backgnd noise monitor Gmax = +9dB Gmin = -21dB … -40dB (VOL) LINE +23dB +14dB +8dB Offset comp Compress Peak detector speech +3dB Voice switching FT2 Peak detector Compress Offset comp CTXoffset RO FT1 CBN RECV Offset comp Compress Peak detector Cmicoffset CBckgnd RECI Gmax = -4dB … +16dB (VOL) Gmin = -33dB +12dB 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 IDLE-mode RX-mode TX-mode 0dB -10dB TX-gain -20dB Vol max Vol default Vol min -25dB -30dB -40dB RX-gain -50dB Revision 3.4 Page 6 of 19 austriamicrosystems Data Sheet AS2522B Serial Interface Registers The settings of the AS2522 are stored in 16 registers. Each register has 4 bit data width. Writing data into the AS2522 also causes the sending of the AS2522 status information on Pin D0. This information consists of the DC-current information (from the Line Loss Compensation circuit) and the status of the power-on reset circuit to test if AS2522 has already powered up. D7 D6 D5 D4 D3 D2 D1 D0 LLC5 LLC4 LLC3 LLC2 LLC1 LLC0 xPOR POR Power on reset information in Statusbits D1 and D0 D1 D0 0 0 0 1 AS2522 is in POR state 1 0 AS2522 is active 1 1 DC-current information in Statusbits D7 – D2 D[7:2] LLC-bit LO LLC-bit HI 000000 <20mA <45mA 000001 20-26mA 45-51mA 000011 26-32mA 51-57mA 000111 32-38mA 57-63mA 001111 38-44mA 63-69mA 011111 44-50mA 69-75mA 111111 >50mA >75mA Revision 3.4 Page 7 of 19 austriamicrosystems Data Sheet AS2522B Timing The data format for writing to a register has the following form: xCS CLK A3 DI DO Note: A2 D7 A1 D6 A0 D5 D3 D4 D2 D3 D1 D2 D0 D1 D0 The pins xCS,CLK,DI have internal pull-up resistors. Parameter Symbol MIN CLK Pulse width HIGH t6 100ns CLK Pulse width LOW t5 100ns xCS to first falling CLKedge setup time t1 50ns CLK to DOUT delay t2 DIN to CLK setup time t3 50ns DIN to CLK hold time t4 50ns t5 t1 t2 t3 TYP MAX 50ns t6 t4 xCS CLK DIN DOUT Revision 3.4 Page 8 of 19 austriamicrosystems Data Sheet AS2522B Serial interface Registers The following table shows the content of the 16 control registers. For a detailed description of the commands see Application note AN522. Address Data Default value after reset Control registers AS2522A, AS2522B A A A A D D D D 3 2 1 0 3 2 1 0 0 0 0 1 DTMFpair 0101 CT1 CT0 x x V0 preemph x V1 Tone x x x x x Revision 3.4 Tone: DTMF-signal path 0...OFF, 1...ON preemph: DTMF-preempahsis 0...2.2dB, 1…3.2dB CT1 CT0: @RO @LO1/LO2 0 0 -36dB -15dB DTMF-confidence level 0 1 -30dB -9dB rel. to pin LS 1 0 -24dB -3dB 1 1 -18dB +3dB Single Tone frequencies if FSK=0 (Addr. 12) and RING/Beep Volum e [4] 0000 frequ1 frequ0 V1 0 0 800Hz 0 0 1 1067Hz 0 1 0 1333Hz 1 1 1 1333Hz 1 Tone Generator m ode, single tone path 0000 V0: 0 1 0 1 RING volume -17.5dB -11.5dB -5.5dB 0dB 0000 RING: RING-path 0...OFF, BNON: Noise monitor 0...OFF, SOFTRX: Softclip RX 0...OFF, SOFTTX: Softclip TX 0...OFF, DC/DC-Converter ON/OFF,Mask 0000 ldbr: Digital tone at RO ldbl: Digital tone at LO1/LO2 MASK: Mask function DC/DC: DC/DC-converter x x x x Soft-TX M0 BURS: Analog tone at RO 0...OFF, 1...ON BURL: Analog tone at LO1/LO2 0...OFF, 1...ON M1 M0: Tone generator mode select 0 0 Tone generator OFF 0 1 DTMF generator mode 1 0 Single tone Analog mode 1 1 Single tone Digital mode ( RING ) Softclip-settings, Noise m onitoring DC/DC 1 x M1 0 x frequ0 1 x frequ1 0 x Soft-RX 1 Frequency 0Hz 800Hz (ring) 1067Hz (ring) 1333Hz (ring) 1300Hz (V.23) 2100Hz (V.23) 1200Hz (Bell 202) 2200Hz (Bell 202) 980Hz (V.21) 1180Hz (V.21) 1070Hz (Bell 103) 1270Hz (Bell 103) 1650Hz (V.21) 1850Hz (V.21) 2025Hz (Bell 103) 2225Hz (Bell 103) 1 x x x x Mask 1 1 Data f[3:0] 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 LOW-Group r1 r0 fLow 0 0 697Hz 0 1 770Hz 1 0 852Hz 1 1 941Hz Data DTMF-level LOW GROUP at pin LS 0x0 -16dBm : : 0xC -4dBm DTMF-settings ldbr 0 1 0 HIGH Group c1 c0 fHigh 0 0 1209Hz 0 1 1336Hz 1 0 1477Hz 1 1 1633Hz 0000 1100 Burl 0 1 0 Single tone mode AS2522B ONLY AND FSK=1 (Addr 12): DTMF-Level 13 steps, 1dB stepsize Burs 0 1 1 DTMF-Generator mode: na 0 DTMFLevel Bnon 0 0 1 ring 0 0 ldbl 0 No operation. W rite to this location to get AS2522-Satus inform ation without altering any other setting. Frequency select depending on Tone Generator mode f0, r0 0 Nop f2, r1 0 f3, c0 0 f4, c1 0 1...ON 1...ON 1...ON 1...ON 0...OFF, 0...OFF, 0...OFF, 0...OFF, 1...ON 1...ON 1...ON 1...ON Page 9 of 19 austriamicrosystems Data Sheet AS2522B Address Data Control registers AS2522A, AS2522B Default value after reset A A A A D D D D 3 2 1 0 3 2 1 0 1 1 0 0 0 0 0 16 gains Handsfree receive endgain 0111 1 Data RXgain TXgain 0x0 -20dB -30dB Min. receive volume : : 0xF 0dB -50dB Max. receive volume Handsfree switching characteristic 1000 x x x x off1 off0: BGN-offset 0 0 120mV 0 1 180mV 1 0 240mV 1 1 300mV 1 1 1 0 0 1 1 1 0 0111 x x x Hfs0 0 Data HS-mode HF-mode 0x0 -6dB 22dB : : : 0xF +9dB 37dB FSK-mode, LLC[2], LI-Voltage Hfs1 0111 off0 1 16 gains Data HS-mode HF-mode 0x0 30dB 39dB : : : 0xF 45dB 54dB Receive gain [16], 16 steps, 1dB stepsize off1 0 16 gains Hfs1 HFs0: 0 0 0 1 1 0 1 1 Transmit gain x Speed of voice switching max speed min speed [16], 16 steps, 1dB stepsize 0111 AS2522B: FSK: Frequency select in single tone mode AS2522B ONLY FSK: 0 Single Tone frequencies are read from Addr. 4: frequ1, frequ0 1 Single Tone frequencies are read from Addr. 1: f4,f3,f2,f1 Llc1 Llc0 x x x x x x 1 0 1 1 1 1 x Krat5 1 Revision 3.4 Test1 x 1 Test2 His x Hf Liv 1 Lh 0 Mute 1 Test3 1 FSK AS2522A FSK: For factory test only ! x x x LIV: Voltage at pin LI 0...3.5V, 1...4.5V 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 Mute, Lh, Hf, Hook Switch 0000 Mute: Mute transmit 0...OFF, 1...ON His Hf Lh 0 x x On Hook 1 0 0 Off Hook, Handset mode 1 1 0 Off Hook, Handfree mode 1 1 1 Off Hook, Loudhearing mode Krat5,Test3,Test2,Test1: For factory test only ! 0000 Reset to defaults na Page 10 of 19 austriamicrosystems Data Sheet AS2522B 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 +/- 1000V Electrostatic Discharge (HBM 1.5kΩ-100pF) 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 DC characteristics I Line =15mA w/o operation of any additional external circuitry, unless other specified Symbol Parameter Conditions Min Type Max Units Test I DDS Operating Current Speech Mode 3 6 mA Y I DDH Operating Current Handsfree Mode 7 10 mA Y V LI Line Voltage LIVolt=0 Line Voltage LIVolt=1 15mA<=ILINE<=100mA 3.5 4.5 3.8 4.8 V V Y Y I OL Output Current, Sink CS,SS mA N Revision 3.4 VOL=0.4V 3.2 4.2 1 Page 11 of 19 austriamicrosystems Data Sheet AS2522B Transmit characteristics I Line =15mA f=800Hz, default settings unless other specified Symbol A M1/2TX Parameter Transmit Gain Conditions Min Type Max Units Test Z AC(syn)= 1000Ω 35 +36.5 38 dB Y Z AC(syn) =1000Ω 43 +45.0 47 dB Y M1/M2 → LS A M3/4TX Transmit Gain M3/M4 → LS ∆ A TX Variation with frequency f = 500Hz … 3.4kHz ±0.8 dB N A VRM12 Control range 16 steps -7/+8 dBr N 16 steps -7/+8 dBr N % Y 2 VP N 2 VP N M1/M2 → LS A VRM34 Control range M2/M4 → LS THD Distortion V AGC1 Soft Clip Level V LS =0.25VRMS 2 M1/M2 → LS at LS V AGC2 Soft Clip Level M3/M4 → LS at LS A SCO Soft Clip Overdrive M1/M2 - M3/M4 20 dB N t attack Attack time 70 us/6dB N t decay Decay time 100 ms/6dB N Z IN-M1/2 Input Impedance M1/M2 10 kΩ N Z IN-M3/4 Input Impedance M3/M4 10 kΩ N V INmax Input Voltage Range M1/2 - M3/4 differential ±1 Vp N V NO Noise Output Voltage LS T AMP =25°C dBmp Y Mute Attenuation Mute activated dB Y A MUTE Revision 3.4 -72 Handset mode Gain = 36.5dB 60 Page 12 of 19 austriamicrosystems Data Sheet AS2522B Receive characteristics I Line =15mA f=800Hz, default settings unless other specified Symbol A RO A LO12 Parameter Conditions Receive Gain Z AC(syn) =1000Ω LS → RO Vol default Min Type Max Units Test -2 -0.5 1 dB Y +28 +29.0 +31 dB Y Receive Gain Z AC(syn) =1000Ω LS → LO1/LO2 Vol maximum ∆ A RX Variation with frequency f=500Hz to 3.4kHz ±0.8 dB N A VRRO Control range 16 steps -7/+8 dBr N 16 steps -7/+8 dBr N LS → RO A VRLS Control range LS → LS1/LS2 THD LS Distortion LS1/LS2 V LS =0.25VRMS 5 % Y THD RO Distortion RO V LS =0.25VRMS 2 % Y V UFC Unwanted Freq. Cmp. f = 200 … 20kHz -60 dBm Y 1 VP N V AGCRO Soft Clip Level RO V AGCLS Soft Clip Level LS1/2 2 VP N A SCLS Soft Clip Overdrive LS1/2 10 dB N t attack Attack time 70 us/6dB N t decay Decay time 100 ms/6dB N V NO Noise Output Voltage RO dBmp Y T AMP =25°C -72 Gain = 3dB Z IN-RI V INmax Input Imp. RI Input Voltage Range RI 8 ±2 kΩ Vp N Z IN-STB V INmax Input Imp. STB Input Volt. Range STB 80 ±2 kΩ Vp N ST Side tone V RI <=0.25VRMS 26 dB Y RL ∆ Z AC/°C Return Loss Temp. Variation Z AC(syn) =1000Ω 18 dB Y Revision 3.4 0.5 Ω/°C Page 13 of 19 austriamicrosystems Data Sheet AS2522B DTMF characteristics I Line =15mA w/o operation of any additional external circuitry, unless other specified, default settings Symbol Parameter Conditions Min Type Max Units Test -7 -6 -5 dBm Y dBm N 3.7 dB Y -40 -46 -52 -58 -70 -80 dBm dBm dBm dBm dBm dBm Y Y Y Y Y Y 1.2 % Y V MFlow Tone level low group at LS Default MF range DTMF level range low group at LS 13 steps Prg. in Service mode ∆ V L-H Preemphasis L-H Preemphasis=1 UFC Unwanted frequency components 300 Hz - 4.3kHz 4.3kHz - 7kHz 7kHz - 10kHz 10kHz - 14kHz 14kHz - 28.5kHz 28.5kHz - 40kHz ∆f Frequency deviation V CT-H Comfort tone handset Rel to LS programmable in service mode -36 -30 -24 -18 dBr dBr dBr dBr N N N N V CT-L Comfort tone Loudspeaker Rel to LS programmable in service mode -15 -9 -3 +3 dBr dBr dBr dBr N N N N Units Test Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz N Y Y Y N N N N N N N N N N N N -18/-6 2.7 3.2 Ringer Symbol F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15 Revision 3.4 Parameter Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Conditions Min 770 1025 1280 Type 0 800 1067 1333 1300 2100 1200 2200 980 1180 1070 1270 1650 1850 2025 2225 Max 830 1110 1385 Page 14 of 19 austriamicrosystems Data Sheet AS2522B Miscellaneous Symbol Parameter Conditions Min Type Max Units Test V PARO Pacifier level at RO RL = 150 Ohm 30 mV pp N V PALS Pacifier level at LS1/2 RL = 50 Ohm 100 mV pp N Test circuit 15nF 100uF 10uF 13 10V LS M3 RI M4 5 15nF 11 30 10 3 LI 600 Iline 15nF M1 300 6 1uF 15nF Vac 7 BC327 8 6k 14 STB M2 CS 10uF RO 17 CI 100nF RECI 32 9 4 15 150 10k VSSD VSS 100nF RECV 16 AS2522A BC327 12 10k SS LO2 22 23 VPP OSC CBN 27 28 29 30 31 20 FT2 10uF 1uF 1 1uF 2 FT1 AGND VDDD 19 18 Revision 3.4 100uF 5V1 xCS DO DI CLK CM VDD 21 24 VSSA 22uF 25 26 470uF 50 LO1 3.58MHz Resonator Page 15 of 19 Data Sheet AS2522B austriamicrosystems Typical application Revision 3.4 Page 16 of 19 Data Sheet AS2522B austriamicrosystems Bonding Diagram 32 Lead 7x7mm TQFP dimensions Revision 3.4 Page 17 of 19 austriamicrosystems Data Sheet AS2522B Packaging Ordering Information Number Package Description AS2522B Q TQFP plastic thin quad flat package – 32 leads (suffix T) Pin-out, Marking AS2522B F DOF Dice-on-Foil 32 31 30 29 28 27 26 25 VSSD OSC CLK DI DO xCS VDDD VSSA 32-pin plastic TQFP (suffix Q) For exact mechanical package dimensions please see austriamicrosystems AG packaging information. 1 2 3 4 5 6 7 8 YYWWAAA AS2522X 24 23 22 21 20 19 18 17 VSS 9 LI 10 RI 11 SS 12 LS 13 CI 14 RECI 15 RECV 16 FT1 FT2 M4 M2 M3 M1 STB CS YY WW AAA year of production calendar week of production austriamicrosystems AG assembly ID X revision LO1 LO2 VPP CM CBN AGND VDD RO 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. Revision 3.4 Page 18 of 19 austriamicrosystems Data Sheet AS2522B 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 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 Switzerland austriamicrosystems Switzerland AG Rietstrasse 4 CH-8640 Rapperswil, Switzerland Phone: +41/55/220 9000 Fax: +41/55/220 9001 Distributors & Representatives USA (west) Spain, Israel, Korea, Hong-Kong, Taiwan, Malaysia, Singapore, India, Brazil austriamicrosystems USA, Inc. Suite 116, 4030 Moorpark Ave, San Jose, CA 95117, USA Phone: +1/408/345 1790 Fax: +1/408/345 1795 Revision 3.4 austriamicrosystems AG is represented by distributors in the following countries. Please contact your nearest regional sales office for the distributor address: Application Support Please contact your local sales office or your distributor. Page 19 of 19