Press Center
Home About us Products Support Quality & Certification Career Contact us
• Power Management
    Linear Regulators
    Low Dropout Linear Regulators
    DDR Termination Regulators
    Shunt Reference Regulators
    Step Down Switching Regulators
    Switching Regulator
    Step-Up DC-DC Converter
    PWM Controller
    White LED Driver
    Supervisory Circuit
    Voltage Detection and System R
    USB Power Switch
    Power Factor Control
    Li-Battery Protection or Charg
    FET Bias Controllers
    Combo IC
    Inverting DC-DC Converter
• Amplifier / Comparator
    Audio Amplifiers
    Operational Amplifier
    Voltage Comparator
• Analog Switches
    Video Signal Switch
    Analog Multiplexers, Demultipl
• Hall ICs
• Special Application ICs
    Motor Controller IC
    Interface and Driver Circuit
    Telecommunication Circuit
    Melody IC
    Alarm /Sound Generator IC
    Remote Controller IC
    Television Circuit
    Leakage Current Detector
    Automotive IC
    A-D or D-A Converters
    Radio and Cassette Recorder Ci
    Mouse&Keyboard Controller
    Transient Voltage Suppressors
    Sense Monitor
    Video Filter
    ZCB snubber
• Logic
    Power Mosfet
• SCRs
Home >
MC34018 Datasheet



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.

* 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.
About us  |  Products  |  Contact us
Copyright 2011 UTC All received