as2504 austriamicrosystems, as2504 Datasheet
as2504
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as2504 Summary of contents
Page 1
... Rx volume control Block Diagram Cordless telephone, answering machine line interface General Description AS2504 is a CMOS integrated circuit that incorporates DC and AC line adaptation (DC- mask and synthesised AC-impedance of 1000 ) as well as a speech circuit with softclipping, line loss compensation and Rx- volume control. It shall act as an a/b-line powered or auxiliarily powered device, which is controlled by a CPU ...
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... Differential input for the microphone (electret) 24 ATI1 A T uxiliary ransmit R >= 25k I 23 ATI2 A T uxiliary ransmit R >= 100k I Function ense Input —> VDD —> AGND —> VSS D rain S ource nput I 2 nput 2/12 AS2504 =20mA and L August 1998 ...
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... Digital input to select a signal path 20 TX0 T 0 ransmit / bit Digital input to select a signal path 19 TX1 T 1 ransmit / bit Digital input to select a signal path Function I 3 nput H 1 andset H 2 andset O 1 utput >= V -0.3V) or decreasing (= connect bit 3/12 AS2504 +1.4V < V < August 1998 ...
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... 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 AS2504 is set to t.m. 1000 . With the external capacitor at CI-pin it can be programmed complex. With an external resistor of approx. 1.5k pin it can be programmed to 600 . ...
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... AUX0: bit AUX1: bit TX0: bit TX1: bit 5/12 AS2504 0 LS —> ROH1 0 LS —> ROH2 1 ATI3 —> ROH1 1 ATI3 —> ROH2 HSS: bit 1 X MUTE 1 0 M1/M2 —> ARO1 1 1 M3/M4 —> ARO1 —> ...
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... Preliminary Data Sheet Typical Application 6/12 AS2504 August 1998 ...
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... Digital Input Voltage HIGH Pins HSS,RX0,TX0, IH Conditions Min Speech Mode MASK=H, V =2.5V DD 15mA<=I <=100mA 4.2 LINE V =0.4V OL Pins HSS,RX0,TX0 TX1,AUX0,AUX1 0 TX1,AUX0,AUX1 7/12 AS2504 -0.3V <= V < ± 25mA -0.3V <= V <= 12V in -0.3V <= V < -2V <= V <= V +0. -0.3V <= V <= V +0. ± 1000V -65° +125°C 4V < ...
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... AC/°C Conditions Min +36.0 Z =1000 AC(syn) +42.0 Z =1000 AC(syn) +5.0 Z =1000 AC(syn) +19.0 Z =1000 AC(syn 500Hz … 3.4kHz V =0.25V LS RMS f = 200Hz … 20kHz 60 differential T =25°C AMP 18 Z =1000 AC(syn) 8/12 AS2504 Typ Max Units +37.5 +39.0 dB +43.5 +45.0 dB +6.5 +8.0 dB +20.5 +22.0 dB ±0 -60 dBm 2 2 µs/6dB 30 ms/ ...
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... Input Imp. RI IN-RI V Input Voltage Range RI INmax Conditions Min +21.5 +27.2 +4.5 +10.5 Conditions Min +1.0 Z =1000 AC(syn) +7.0 Z =1000 AC(syn) +0.7 Z =1000 AC(syn) f=500Hz to 3.4kHz V =0.25V LS RMS V =0.25V LS RMS f = 200 … 20kHz T =25°C AMP 9/12 AS2504 Typ Max Units +23.0 +24.5 dB +28.7 +30.2 dB +6.0 +7.5 dB +12.0 +13.5 dB 100 k Typ Max Units +2.5 +4.0 dB +8.5 +10.0 dB +2.2 +3.7 dB ±0.8 dB -6/+8 dBr -60 dBm 0 ...
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... Preliminary Data Sheet Symbol Parameter Z Input Imp. STB IN-STB V Input Volt. Range STB INmax ST Sidetone RL Return Loss Temp. Variation Z AC/°C Test circuit Conditions Min V <=0.25V 24 RI RMS 18 Z =1000 AC(syn) 10/12 AS2504 Typ Max Units 80 k ± 0.5 /°C August 1998 ...
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... TX0 – – ARO1 TX1 – – VDD AUX0 – – AGND AUX1 – – STB VOL – – CI ATI3 – 15 Marking YYWWAAA AS2504 Austria YY year of production WW calendar week of production AAA AMS assembly ID AG 11/12 AS2504 August 1998 ...
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... Ordering information Number Package Description AS2504 T SO28 plastic small outline package - 28 leads (suffix T) Devices sold by Austria Mikro Systeme Int. AG are covered by the warranty and patent idemnification provisions appearing in its Term of Sale. Austria Mikro Systeme Int. AG makes no warranty, express, statutory, implied description regarding the information set forth herein or regarding the freedom of the decribed devices from patent infringement ...