Product Summary

The CMX868E2 is a multi-standard modem for use in telephone based information and telemetry systems. The CMX868E2 can transmit and detect standard DTMF and modem calling and answer signals or user-specific programmed single or dual tone signals. The CMX868E2 operates from a single 2.7 to 5.5V supply over a temperature range of -40℃ to +85℃ and is available in 24-pin TSSOP, SOIC and DIP packages. It is used in telephone telemetry systems, remote utility meter reading, security systems, industrial control systems, electronic cash terminals, etc.

Parametrics

CMX868E2 absolute maximum ratings:(1)supply (VDD-Vss):-0.3 to 7.0 V; (2)voltage on any pin to Vss:-0.3 VDD+0.3 V; (3)current into or out of VDD and VSS pins:-50 to +50mA.; (4)Current into RDRVN pin (RDRVN pin low): +50mA max; (5)Current into or out of any other pin: -20 to +20mA; (6)Total Allowable Power Dissipation at Tamb = 25℃: 1000mW max; Derating: 13mW/℃ max ; (7)Storage Temperature: -55 to +125℃; (8)Operating Temperature: -40 to +85℃.

Features

CMX868E2 features:(1)V.22 bis 2400/2400 bps QAM;(2)V.22, Bell 212A 1200/1200 or 600/600 bps DPSK;(3)V.23 1200/75, 1200/1200, 75, 1200 bps FSK;(4)bell 202 1200/150, 1200/1200, 150, 1200 bps FSK;(5)V.21 or Bell 103 300/300 bps FSK;(6)"Power-save" standby mode. It can be used in telephone telemetry systems, remote utility meter reading, security systems, industrial control systems, electronic cash terminals and pay-phones, cable TV set-top boxes.

Diagrams

CMX868E2 block diagram

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