CMX469A

The CMX469A 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 2400/4800Hz respectively. Tone frequencies are phase continuous; transitions occur at the zero crossing point.

Features:

• Selectable Data Rates: 1200/2400/4800 Baud
• Full Duplex FFSK
• Rx and Tx Bandpass Filters
• Clock Recovery and Carrier Detect Facilities
• Pin Selectable Xtal/Clock Inputs:
  1.008MHz or 4.032MHz
• Simple Control: No µP Required