The CMX860 is a flexible, low power Telephone Signaling Transceiver IC designed for use in a wide range of line-powered telephone equipment. The IC combines the functions of a DTMF encoder and decoder, V.23/Bell 202 modulator and demodulator plus call progression circuitry with analog switching between line and phone interfaces. Ring detection, local phone off-hook detection, and a relay for line hook-switch operation are also provided under the control of CBUS. The ring and hook detectors operate while the remainder of the IC is powersaved, generating an interrupt to wake-up the host C when further processing or signaling is required.

FEATUREs
• V.23 & Bell 202 FSK Transmit and Receive
• DTMF/Tones Transmit and Receive
• Line & Telephone Complementary Drivers
• Call Progress Decoder
• CAS Tones Detection and Generation
• Simple ‘C-BUS’ Serial Interface
• Low Power Operation
• ‘Powersave’ Standby Mode

APPLICATIONs
• Least Cost Routers
• Vending Machines
• Alarm Systems
• Home Management Systems
• Remote Meter Reading
• Internet Appliance Applications
• Cable TV Set-Top Boxes
• Advanced Feature Phones