GENERAL DESCRIPTION
The XE1209 is a CMOS Ultra Low-Power transceiver for short-range low frequency RF data communications system. It uses 2-level Continuous Phase FSK modulation. The receiver section
includes the preamplifier, the down-converter, and the channel filters, the demodulator and the bit
synchronizer, which delivers synchronized data at the output. The transmitter section is composed of a Direct Digital Synthesizer (DDS), and the power amplifier generating a square-wave output current.

KEY FEATURES
•Single chip transceiver
•Low cost
• Low external component count
• Ultra Low Power
- Stand-by mode
- Carrier detection mode
-  Low-power receiver mode
• Unlicensed frequency band
• Short range applications; 1 to 3 meters

APPLICATIONS
•Remote control
• Short Range Wireless data
•Access control