CMX869B Datasheet | CML

Features - V.32 bis/V.32/V.22 bis/V.22 Automode Modem - EPOS Terminals - V.22 bis/V.22 Manual Mode (2400, 1200 bps) - V.23 (1200/75, 1200/1200, 75, 1200 bps FSK) - Telephone Telemetry Systems - Remote Utility Meter Reading - Bell 202 (1200/150, 1200/1200, 150, 1200 bps FSK) - Security Systems - V.21 or Bell 103 (300/300 bps FSK) - High Performance DTMF Codec - Industrial Control Systems - Electronic Cash Terminals - Single/Dual Tone Encoders and Decoders - Pay-Phones - ‘Powersave’ Standby Mode - Cable TV Set-Top Boxes - Asynchronous, Synchronous and HDLC Modes LINE LINE INTERFACE TX USART & SCRAMBLER. QAM / FSK MODULATOR. TONE / DTMF GENERATOR. RX DESCRAMBLER & USART, QAM / FSK RECEIVER. CALL PROGRESS / TONE / DTMF DETECTOR. RING DETECTOR. RELAY DRIVER. C-BUS SERIAL INTERFACE HOST µC 1. Brief Description The CMX869B is a multi-standard modem for use in EPOS terminals and telephone based information and telemetry systems. This highly integrated single-chip modem IC provides the functions needed to construct a ITU V.32 bis automode modem or a V.22 bis, V.22, V.21 and Bell 202, Bell 103 patible modem operating under the control of external host timing for EPOS and other proprietary protocols. The V.32 bis automode-modem provides operation from 14400 bps with automatic fallback through to 4800 bps, retrain, rate re-negotiation and automatic detection of V.22 and V.22 bis modems. A high-quality DTMF decoder with excellent immunity to falsing on voice and a standard DTMF encoder are included. Alternatively, the device can transmit and detect user-programmed single and dual-tone signals, call progress signals or modem calling and answering tones. © 2008 CML Microsystems Plc Low-Power V.32 bis Modem The CMX869B features a software controlled output to drive a hook switch relay and a ring detector block that continues to function when the device is in Powersave mode. When a line voltage reversal or ringing signal is detected, the ring...