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CML Microcircuits
CML Microcircuits
CML Microcircuits
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Low Power V.22 Modem

CML Microcircuits

The CMX867A is a multi-standard modem for use in telephone based information and telemetry systems.

Product Description

Control of the device is via a simple high speed serial bus, compatible with most types of µC serial interface. The data transmitted and received by the modem is also transferred over the same serial bus. On-chip programmable Tx and Rx USARTs meeting the requirements of V.14 are provided for use with asynchronous data and allow unformatted synchronous data to be received or transmitted as 8-bit words.

A high-quality DTMF decoder with excellent immunity to falsing on voice and a standard DTMF encoder are included. Alternatively, these blocks can be used to transmit and detect user-specific, programmed single and dual-tone signals, call progress signals or modem calling and answering tones.

Flexible line driver and receive hybrid circuits are integrated on chip, requiring only passive external components to build a 2 or 4-wire line interface.

The device also features a Hook Switch Relay Drive output and a Ring Detector circuit which continues to function when the device is in the Powersave mode, providing an interrupt which can be used to wake up the host µController when line voltage reversal or ringing is detected.

  • Baud Rates:1.2k
  • Data Format:V.21, V.22, V.23, Bell 103, Bell 202, FSK
  • Mounting Type:Surface Mount
  • Supplier Device Package:24-SOIC ~ 24-TSSOP
  • Voltage - Supply:2.7V ~ 5.5V

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CMX867AD2CMX867AD2LOW-POWER V.22 MODEM V.21, V.22, V.23, Bell 103, Bell 202, FSK1.2k2.7V ~ 5.5VSurface Mount24-SOIC (0.295", 7.50mm Width)RoHS
CMX867AE2CMX867AE2LOW-POWER V.22 MODEM V.21, V.22, V.23, Bell 103, Bell 202, FSK1.2k2.7V ~ 5.5VSurface Mount24-TSSOP (0.173", 4.40mm Width)RoHS

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