Brief Description
The CMX867 is a multi-standard modem for use in telephone based information and telemetry systems.
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.

FEATUREs
 • V.22, Bell 212A 1200/1200 or 600/600 bps DPSK
 • V.23 1200/75, 1200/1200, 75, 1200 bps FSK
 • Bell 202 1200/150, 1200/1200, 150, 1200 bps FSK
 • V.21 or Bell 103 300/300 bps FSK
 • DTMF/Tones Transmit and Receive
 • ‘Powersave’ Standby Mode
 • Software and Hardware Compatible with CMX868

APPLICATIONs
 • Telephone Telemetry Systems
 • Remote Utility Meter Reading
 • Security Systems
 • Industrial Control Systems
 • Electronic Cash Terminals
 • Pay-Phones
 • Cable TV Set-Top Boxes