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V.23 Transmit Modulator with Data Retiming

CMX654


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

Supply Requirement:

  • 3.0 to 5.5 V power supply

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

Design Support Information

 
Package: D4 (DW) 16-pin SOIC
 
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