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BL34018

SHANGHAI BELLING
Part Number BL34018
Manufacturer SHANGHAI BELLING
Description high quality hands free speakerphone system
Published Dec 19, 2006
Detailed Description www.DataSheet4U.com BL34018 1. GENERAL DESCRIPTION The BL34018 Speakerphone integrated circuit Incorporates the necessa...
Datasheet PDF File BL34018 PDF File

BL34018
BL34018

Overview
www.
DataSheet4U.
com BL34018 1.
GENERAL DESCRIPTION The BL34018 Speakerphone integrated circuit Incorporates the necessary amplifiers ， attenuators ， and control functions to produce a high quality hands free speakerphone system． Include are a microphone amplifier， a power audio amplifier for the speaker， transmit and receive attenuators，a monitoring system for background sound level，and an attenuation control system which responds to the relative transmit and receive levels as well as the background level．Also included are all necessary regulated voltages for both internal and external circuitry， allowing line-powered operation (no additional power supplies required)．A chip select pin allows the chip to be powered down when not in use．A volume control function may be implemented with an external potentiometer．BL34018 applications include speakerphones for household and business use，intercom systems，automotive telephones，and others． 2.
FEATURE Voice switched speakerphone circuit.
All...


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