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CMX868A Low Power V.22 bis Modem IC

CMX869B Low Power V.32 bis Modem

CMX850 Communications Controller

CMX661 Dual SPM Decoder for Pair Gain Applications

CMX866 V.22bis Modem with AT Command Set

CMX878 V.22 bis Modem plus DAA

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CMX631A SPM Detector

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CMX641A Dual SPM Detector plus Payphone Security

CMX673 Call Progress Tone Detector

CMX683 Call Progress and Voice Detector

CMX860 Telephone Signalling Transceiver

FX/MX604 V.23 Compatible Modem

CMX264 Frequency Domain Split-Band Scrambler

CMX654 V.23 Transmit Modulator

FX/MX019 Digitally Contolled Quad Amp Array

FX029 Dual Digitally Controlled Amp Array

FX614 Bell 202 Compatible Modem


CMX654 V23 Transmit Modulator IC with Data Retiming
CMX654

V.23 Transmit Modulator with Data Retiming
Features:
  • 1200bps, V.23 Transmit Modulator
  • Zero-Power Mode
  • 1200bps Tx Data Retimimg
  • 3.58MHz Xtal/Clock Rate
  • Meets ITU and ETSI Specifications
Applications:
  • Caller ID Generation for:
    • SDN Terminal Adapters
    • Wireless Local Loop Systems
    • ISDN PABX Applications
    • Pair-Gain Systems
    • Public Switched Telephone Networks
    • Trunk Exchanges
Packages:
  • CMX654D4 - 16-pin SOIC
  • CMX654P3 - 16-pin PDIP
Supply Requirement:
  • 3.0 to 5.5 V power supply
Description

The CMX654 is a low power CMOS integrated circuit for the transmission of asynchronous 1200bps data in accordance with ITU, V.23 and ETSI specifications.

The device incorporates an optional Tx data retiming function. The device can be operated so that only the mark or space tone is produced.

The CMX654 may be used in a wide range of telephone telemetry systems. With a low voltage requirement of 3.0V it is suitable for both portable terminal and line powered applications.
A very low current 'sleep' mode and operating current of 1mA typ. mean the device is ideal for line powered applications.
A 3.58MHz Standard Xtal/Clock rate is required and the device operates from a 3.0 to 5.5V supply.

Block Diagram

CMX654: a low power CMOS integrated circuit for the transmission of asynchronous 1200bps data in accordance with ITU, V.23 and ETSI specifications

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