CML Microcircuits
COMMUNICATION SEMICONDUCTORS
D/869B/3 May 2008
CMX869B
Low-Power
V.32 bis Modem
V.32 bis Automode Modem with V.22 bis Manual Mode Operation and
High Performance DTMF Codec
Features
•
•
•
•
•
•
•
•
•
V.32 bis/V.32/V.22 bis/V.22 Automode Modem
V.22 bis/V.22 Manual Mode (2400, 1200 bps)
V.23 (1200/75, 1200/1200, 75, 1200 bps FSK)
Bell 202 (1200/150, 1200/1200, 150, 1200 bps FSK)
V.21 or Bell 103 (300/300 bps FSK)
High Performance DTMF Codec
Single/Dual Tone Encoders and Decoders
‘Powersave’ Standby Mode
Asynchronous, Synchronous and HDLC Modes
•
•
•
•
•
•
•
•
EPOS Terminals
Telephone Telemetry Systems
Remote Utility Meter Reading
Security Systems
Industrial Control Systems
Electronic Cash Terminals
Pay-Phones
Cable TV Set-Top Boxes
TX USART & SCRAMBLER.
QAM / FSK MODULATOR.
TONE / DTMF GENERATOR.
LINE
LINE
INTERFACE
RX DESCRAMBLER & USART,
QAM / FSK RECEIVER.
CALL PROGRESS / TONE /
DTMF DETECTOR.
RING DETECTOR.
RELAY DRIVER.
CMX869B
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 compatible
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
CMLMICRO [ CML MICROCIRCUITS ]
