The IC is a very low power consumption single chip ASK Single Conversion Receiver for receive frequencies bands 868-870 MHz and 433-435 MHz. The IC offers a highlevel of integration and needs only a few external components. The device contains a low noise amplifier (LNA), a double balanced mixer,a fully integrated VCO, a PLL synthesizer, a crystal oscillator, a limiter with RSSI generator, a data filter, a datacomparator (slicer) and a peak 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