General Description
The MICRF221 is a third generation QwikRadio® receiver, offering all the benefits of Micrel's earlier QwikRadio® products with significant improvements, including: enhanced sensitivity, automatic duty-cycle feature and RSSI output.

FEATUREs
• Complete Receiver on a Chip
• -109dBm sensitivity, 1 kbps and BER 10E-02
• Image Rejection Mixer
• 850 MHz to 950 MHz frequency range
• Low Power, 9mA @ 868 MHz, continuous on
• Data Rates to 10kbps (Manchester Encoded)
• Auto polling (sleep mode, current < 0.1 mA)
•Analog RSSI Output
• Programmable “Low Sensitivity” mode
• No IF filter required
• Excellent selectivity and noise rejection
• Low external part count
• Additional Functions Programmed through serial interface