AS2507P datasheet(1/9 Pages) AMSCO

Numer części	AS2507P

Szczegółowy opis	SINGLE CHIP 2-WIRE INTERCOM CMOS INTEGRATED CIRCUIT

PDF	9 Pages

Scroll/Zoom	100%

Producent	AMSCO [ams AG]

Strona internetowa	http://www.ams.com

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Preliminary Data Sheet

AS2507

1/9

July 1998

®

Austria Mikro Systeme International AG

Single Chip 2-Wire Intercom

CMOS Integrated Circuit

Key Features

Line/speech circuit and signalling on one 14

pin CMOS chip

Only 2 wires needed for power supply,

signalling and speech

Soft clipping to avoid harsh distortion

Fully integrated 2/4 wire conversion

Side tone cancellation

Low noise

Signalling with FSK modem

Low standby power consumption allows

parallel operation of up to 25 terminals on a

bus pair with central supply

Parallel operation of up to 70 terminals if

supplied locally

Controllable via simple µC interface

Very few external components

Application

Entrance telephone system, intercom and data

transmission, alarm systems, toy phone

General Description

The AS2507 is a CMOS integrated circuit that

contains all the functions needed to build a 2-

wire intercom network.

The device incorporates 2/4-wire conversion

(hybrid), soft clipping for high speech quality,

FSK modem and a simple interface to a

microcontroller.

The signalling mode is selectable between

FSK modulation and burst mode.

The low standby current (typ. 2 mA) allows

several devices to listen to the 2-wire line.

The speech circuit is designed for compatibility

with commonly used handset (150

Ω earpiece

and electret microphone) with receive gain of

-6 dB and transmit gain of 32 dB (relative to

line).

Package

Available in 14 pin DIP and 16 pin SOIC

Block Diagram

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