CML - Wireline Data and Telephony - CMX860
The CMX860 is a flexible, low-power Telephone Signalling 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 and Bell 202 modulator and demodulator plus call progress circuitry with analogue switching between line and phone interfaces.
Ring detection, local phone off-hook detection and a relay driver for line hook-switch operation are also provided under the control of 'C-BUS'. The ring and hook detectors operate whilst the remainder of the IC is powersaved, generating an interrupt to wake-up the host µC when further processing or signalling is required.
All on-chip functions and switching arrangements are controlled via the C-BUS command/data serial bus.
The CMX860 is designed to operate at 2.7V and utilises CML’s low power DTMF decoder and V.23 modem technology.
- V.23 1200/75 b/s FSK Tx/Rx
- Bell 202 1200/150 b/s FSKTx/Rx
- Tx/Rx DTMF Tones
- Line and Phone Complimentary Drivers
- Call Progress Decoder
- Simple 'C-BUS' Serial Interface
- Low Power Operation with Standby Mode
- Least Cost Routers
- Vending Machines
- Internet Appliances
- Home Management Systems
- Remote Meter Reading
- Alarm Systems
- Cable System TV Set-Top Boxes
- 2.7 to 5.5 V power supply