CMX909B

The CMX909B is a half-duplex Gaussian Minimum Shift Keyed (GMSK) BT = 0.3 modem data pump with on-chip packet data handling.

GMSK modulation optimises the data throughput for a given bandwidth RF channel and the on-chip packet data handling relieves the host µC of regular processing tasks, such as maintaining Bit and Frame Synchronisation.

Features:

• GMSK Modulation
• Rx and Tx Modes up to 38.4kb/s
• Full Data Packet Framing
• Full 'Mobitex' Compatibility including R14N Short-Block Frames
• Data Carrier Detect
• Checksum Generation and Checking
• Two-Level Xtal Drive Circuit
• Flexible Operating Modes
• Host Processor Interface