CMX860 Telephone Signalling Transceiver IC with Modem, Signalling and Matching

Description
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 progression 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 a serial bus ('C-BUS').
The CMX860 is designed to operate at 2.7V and utilises CML’s low power DTMF decoder and V.23 modem technology.

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Features 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	Applications Least Cost Routers Vending Machines Internet Appliances Home Management Systems Remote Meter Reading Alarm Systems Cable System TV Set-Top Boxes Package Styles: - CMX860D1 - CMX860D6 - CMX860E1 Supply Requirement: 2.7V power supply

Description 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 progression 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 a serial bus ('C-BUS'). The CMX860 is designed to operate at 2.7V and utilises CML’s low power DTMF decoder and V.23 modem technology.