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ST5088 Arkusz danych(PDF) 1 Page - STMicroelectronics

Numer części ST5088
Szczegółowy opis  PROGRAMMABLE AUDIO FRONT END FOR DIGITAL PHONES AND ISDN TERMINALS
Download  33 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST5088 Arkusz danych(HTML) 1 Page - STMicroelectronics

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ST5088
PROGRAMMABLE AUDIO FRONT END
FOR DIGITAL PHONES AND ISDN TERMINALS
FEATURES:
Complete CODEC and FILTER system including:
PCM ANALOG TO DIGITAL AND DIGITAL TO
ANALOG CONVERTERS
POWERFUL ANALOG FRONT END CAPA-
BLE TO INTERFACE DIRECTLY:
- Microphone Dynamic or Electrete
- Earpiece down to 100
Ω or up to 150nF
- Loudspeaker down to 50
Ω or Buzzer up to
600nF.
TRANSMIT BAND-PASS FILTER
ACTIVE RC NOISE FILTER
RECEIVE LOW-PASS FILTER WITH SIN X/X
CORRECTION
MU-LAW OR A-LAW SELECTABLE COM-
PANDING CODER AND DECODER
PRECISION VOLTAGE REFERENCE
Phones Features:
DUAL SWITCHABLE MICROPHONE AMPLI-
FIER INPUTS. GAIN PROGRAMMABLE: 15
dB RANGE, 1 dB STEP.
LOUDSPEAKER AMPLIFIER OUTPUT.
SWITCHABLE MAXIMUM GAIN: +9dB/+27dB
WITH AUTOMATIC DIGITAL ANTICLIPPING
SYSTEM. aTTENUATION PROGRAMMABLE:
30dB RANGE, 2dB STEP.
SEPARATE EARPIECE AMPLIFIER OUTPUT.
ATTENUATION PROGRAMMABLE: 15 dB
RANGE, 1 dB STEP.
AUXILIARY TAPE RECORDER ANALOG IN-
TERFACE: Tx + Rx COMBINED OUTPUT.
AUXILIARY SWITCHABLE EXTERNAL RING
INPUT (EAIN).
TRANSIENT SUPRESSION SIGNAL DURING
POWER ON.
INTERNAL
PROGRAMMABLE
SIDETONE
CIRCUIT. ATTENUATION PROGRAMMABLE:
15 dB RANGE, 1 dB STEP, INDEPENDENT
FROM Rx CONTROL.
INTERNAL RING OR TONE GENERATOR IN-
CLUDING DTMF TONES, SINEWAVE OR
SQUAREWAVE
WAVEFORMS.
ATTENU-
ATION PROGRAMMABLE: 27 dB RANGE, 3
dB STEP.
RINGER CONTROL PROGRAMMABLE IN-
TERNALLY (
µP) OR EXTERNALLY (pin AT)
COMPATIBLE WITH HANDS-FREE CIRCUIT
TEA7540.
ON CHIP SWITCHABLE ANTI-ACOUSTIC
FEED-BACK CIRCUIT (ANTI-LARSEN).
General Features:
EXTENDED TEMPERATURE RANGE OP-
ERATION (*) –25
°C TO +85°C.
EXTENDED POWER SUPPLY RANGE 5V
±10%.
60 mW OPERATING POWER (TYPICAL).
1.0 mW STANDBY POWER (TYPICAL).
CMOS DIGITAL INTERFACES.
SINGLE + 5V SUPPLY.
DIGITAL LOOPBACK TEST MODE.
PROGRAMMABLE DIGITAL AND CONTROL
INTERFACES:
– Digital PCM Interface associated with
separate
serial
Control
Interface
MI-
CROWIRE
™ compatible.
– GCI interface compatible.
(*) Functionality guaranteed in the range – 25
°C to +85°C;
Timing and Electrical Specifications are guaranteed in the range
–5
°C to +70°C.
APPLICATIONS:
ISDN TERMINALS.
DIGITAL TELEPHONES
CT2 AND GSM APPLICATIONS
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
December 1999
®
ORDERING NUMBERS:
ST5088D
ST5088FN
PLCC28
SO28
1/33


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