General Description：

The IC is a very low power consumption single chip ASK Single Conversion Receiver for receive frequenciesbands 868-870 MHz and 433-435 MHz. The IC offers a high level of integration and needs only a few externalcomponents. The device contains a low noise amplifier (LNA), a double balanced mixer, a fully integrated VCO, aPLL synthesizer, a crystal oscillator, a limiter with RSSI generator, a data filter, a data comparator (slicer) and apeak detector. Additionally there is a power down feature to save battery life.

Features：

• Low supply current (Is = 4.8 mA typ. at 868 MHz, Is = 4.6 mA typ. at 434 MHz)

• Supply voltage range 5 V ±10 %

• Power down mode with very low supply current (50 nA typ)

• Fully integrated VCO and PLL Synthesizer

• RF input sensitivity < – 107 dBm

• Selectable frequency ranges around 868-870 MHz and 433-435 MHz

• Selectable reference frequency

• Limiter with RSSI generation, operating at 10.7 MHz

• 2nd order low pass data filter with external capacitors

• Data slicer with self-adjusting threshold

Application：

• Keyless Entry Systems

• Remote Control Systems

• Alarm Systems

• Low Bitrate Communication Systems