MC34018_15 Datasheet, PDF (1/8 Pages) Unisonic Technologies – VOICE SWITCHED SPEAKER-PHONE CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD
MC34018
LINEAR INTEGRATED CIRCUIT
VOICE SWITCHED
SPEAKER-PHONE CIRCUIT
 DESCRIPTION
The UTC MC34018 speaker-phone integrated circuit includes
all the active circuitry and control functions to implement a high
quality hands-free telephone system. The circuit includes a
microphone amplifier, a speaker amplifier, level detectors, a
background sound level monitoring system in both the transmit and
receive channels and an attenuation system which can control the
transmit and receive levels as well as the background level.
The applications include household and office
speaker-phones, intercom systems, hand free kit for mobile
phones, and others.
 FEATURES
* Chip Select pin for Power conservation (active/standby mode).
* Integrated all necessary active circuitry for a hand-free telephone
into one single chip.
* Operating under wide dynamic range through signal compression
technology.
* Build-In voltage regulators illuminate external regulators for lining
operation.
* Monitoring system for background noise level.
* Background sound level compensation for transmit and
receive levels as well as the background level.
* Power audio amplifier for typical 100mW output (into 25Ω) with
peak limiting for speaker to minimize distortion.
* Volume control function for external volume control circuit.
 ORDERING INFORMATION
Order Number
Lead Free
Halogen Free
-
MC34018G-D28-T
MC34018L-E28-T
MC34018G-E28-T
-
MC34018G-R28-T
-
MC34018G-R28-R
-
MC34018G-S28-T
-
MC34018G-S28-R
Package
DIP-28
SDIP-28
SSOP-28
SSOP-28
SOP-28
SOP-28
Packing
Tube
Tube
Tube
Tape Reel
Tube
Tape Reel
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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