CML FX469
The FX469 is a single-chip CMOS LSI circuit which operates as a full-duplex pin-selectable 1200, 2400 or 4800 baud FFSK Modem. The mark and space frequencies are 1200/1800, 1200/2400 and 2400/4800 Hz respectively. The FX469 includes on chip circuitry for Carrier Detect and Rx Clock recovery, both of which are made available as output pins.| Part No. | FX469 |
|---|---|
| Datasheet | FX469 Download |
| Manufacturer |  CML |
| Description | 1200/2400/4800 Baud FFSK Modem |
| Buy | Stock & Price |
FEATURES
Selectable Data Rates 1200, 2400 and 4800 Baud Full-Duplex FFSK Rx and Tx Bandpass Filters Clock Recovery and Carrier Detect Facilities Rx and Tx Enable Functions Tx GENERATOR Tx DATA I/P Tx ENABLE CLOCK RATE Tx FILTER 1200/2400/4800 Baud FFSK Modem Publication D/469/6 April 1998 Pin Selected Xtal/Clock Inputs 1.008MHz or 4.032MHz Radio and GeneralAPPLICATIONS
Data-Over-Radio PMR and Cellular Signalling Portable Data Terminals Personal/Cordless Telephone Tx SIGNAL O/P Tx SYNC O/P VDD XTAL/CLOCK CLOCK OSCILLATOR XTAL 1200/2400 BAUD SELECT 4800 BAUD SELECT BANDPASS O/P Rx ENABLE Rx SIGNAL I/P Rx FILTER LIMITER RETRIGGERABLE MONOSTABLE DIGITAL FILTER DATA FILTER LIMITER UNCLOCKED DATA O/P DIVIDER f .. V BIAS n VSS FX469 RECTIFIER DIGITAL PLL DATA LATCH CLOCKED DATA O/P Rx SYNC O/P NOISE FILTER RECTIFIER S/N COMPARATOR CARRIER DETECT TIME CONSTANT CARRIER DETECT O/P Fig.1 Functional Block Diagram BriefDESCRIPTION
Tone frequencies are phase continuous; transitions occur at the zero crossing point.
