TEA7091

更新时间： 2024-11-10 22:49:51

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		电话
页数	文件大小	规格书
7页	142K
描述
TELEPHONE ANALOG FRONT END

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中文翻译

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数据手册

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TEA7091 数据手册

TEA7091

TELEPHONE ANALOG FRONT END

PRODUCT PREVIEW

FEATURES:

SPEECH

DC LINE CURRENT RANGE FROM 6 TO

110mA

Tx AND Rx GAIN EXTERNALLY ADJUST-

ABLE

AGC IN Tx AND Rx EXTERNALLY PRO-

GRAMMABLE

AGC DISABLEABLE THROUGH MICROCON-

TROLLER BUS

PLCC44

SINGLE/DOUBLE SIDETONE NETWORK

SOFTWARE PROGRAMMABLE

SOFTCLIPPING ON Tx CHANNEL

SQUELCH TO REDUCE Tx NOISE ENVI-

ROMENT AND TO IMPROVE HOWLING IM-

MUNITY IN LOUDHEARING MODE

RECEIVING AMPLIFIER FOR PIEZO OR

ELECTRODYNAMIC TRANSDUCERS

+6dB MODE ON Rx CHANNEL (SELECTABLE

THROUGH MICROCONTROLLER BUS)

–6dB MODE ON Tx CHANNEL (SELECTABLE

THROUGH MICROCONTROLLER BUS)

FREQUENCY GENERATOR FOR WAITING

MELODY

PQFP44

PLY TO FEED THE LOUDSPEAKER AMPLI-

FIER DURING RING MODE

DIGITAL VOLUME CONTROL (8 STEPS OF

4dB EACH) THROUGH MICROCONTROL-

LER BUS

RING FREQUENCY GENERATOR PRO-

GRAMMED THROUGH MICROCONTROL-

LER BUS

ERROR BEEP GENERATOR

HOLD LINE CURRENT DETECTOR FOR

TRANSFER/ AUTO RELEASE

DIALLING

GROUP LISTENING / ON-HOOK DIALING

ANTI HOWLING WITH ACOUSTIC FEED-

BACK SYSTEM COUPLED WITH SQUELCH

DTMF GENERATOR (CONTROLLED BY

MCU BUS)

DC MASK VALUE DURING MAKE PERIOD

PROGRAMMABLE THROUGH MICROCON-

TROLLER BUS

DIGITAL VOLUME CONTROL (8 STEPS OF

4dB EACH) THROUGH MICROCONTROL-

LER BUS

ANTILARSEN ATTENUATION (4 DIFFERENT

LEVELS) PROGRAMMABLE THROUGH MI-

CROCONTROLLER BUS

MICROCONTROLLER INTERFACE

STABILIZED VOLTAGE FOR MICROCON-

TROLLER

2 WIRE SERIAL BUS

RING INDICATOR

POWER-ON SIGNAL

RESET SIGNAL

HANDSFREE INTERFACE

PIN AND SOFTWARE FACILITY FOR EASY

INTERCONNECTION WITH HANDSFREE

CONTROLLER IC.

LINE CURRENT VARIATION INDICATOR

RING ON LOUDSPEAKER

SELF BIASED LOUDSPEAKER AMPLIFIER FOR

ANSWERING MACHINE

EMBEDDED SWITCH MODE POWER SUP-

1/7

September 1993

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

12 3 4 5 6 7

中文翻译

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