Brief Description
The CMX469A is a single-chip CMOS LSI circuit which operates as a full-duplex 1200, 2400 or 4800 baud FFSK/MSK modem. The mark and space frequencies are 1200/1800, 1200/2400 and 2400/4800 Hz respectively. Tone frequencies are phase continuous; transitions occur at the zero crossing point.A common Xtal oscillator with a choice of two clock frequencies (1.008MHz or 4.032MHz) provides baud-rate, transmit frequencies, and Rx and Tx synchronization.

FEATUREs
•Full-Duplex FFSK/MSK Modem with Separate Rx and Tx Enable Functions
•Pin Selectable Data Rates: 1200, 2400 or 4800 Baud
•Pin Selectable Xtal/Clock Inputs: 1.008MHz or 4.032MHz
•Clock Recovery Facility
•Carrier Detect Facility
•Low Power Operation (2.0mA typ. at 3.0V)

APPLICATIONs
•Data-Over Radio
•Personal/Cordless Telephone
•Radio and General Applications
•Narrowband Coax Data Channels
•Two Way Radio (MPT1327) Signalling
•Portable Data Terminals