Microchip

RFRXD0420- 8 bit Microcontroller with 512 Bytes EPROM Program Memory

Photograph

Features Low cost single conversion superheterodyne receiver architecture Compatible with rfPIC and rfHCS Easy interface to PICmicro microcontroller(MCU)and KEELOQ decoders Selectable LNA gain control for improved dynamic range Selectable IF bandwidth via external ceramic IF filter FSK/FM quadrature (phase coincidence) detector demodulator 32-Lead LQFP package UHF ASK/FSK Receiver - Single frequency receiver set by single frequency - 300 MHz to 450 MHz - ASK : 80 kbps NRZ - FSK : 40 kbps NRZ - 455 kHz to 21. MHz< FONT> - RSSi range: 70 dB - ±5 kHz to ±120 kHz< FONT> - Maximum FM modulation frequency: 15 kHz Bi-CMOS Technology - Wide operating voltage range - 8.2 mA (typical, LNA High Gain mode), <100 nA standby - -40°c to -85°c Application - Wireless remote command and control - LWireless security systems - Remote Keyless Entry (RKE) - Low power telemetry - Low power FM receiver - Home automation - Remote sensing

Pin Description Pin Number Description 1 Ground reference 2 LNA gain control (with hysteresis) 3 LNA output (opeen collector) 4 1st IF stage input 5 Ground reference 6 MIXER1 bias (open collector) 7 MIXER1 bias (open collector) 8 Positive supply 9 1st IF stage input 10 Ground Reference 11 2nd IF stage input 12 Limiter IF Amplifier external feedback capacitor 13 Limiter IF Amplifier external feedback capacitor 14 Positive supply 15 2nd IF stage input 16 Demodulator input 17 Positive supply 18 Operational amplifier output 19 Operational amplifier input (negative) 20 Operational amplifier input (positive) 21 Received signal strength indicator output 23 Demodulator output (negative) 24 Demodulator output (negative) 25 Ground reference 26 Crystal oscillator input 27 Positive supply 28 Receiver enable input 29 External loop filter connection 30 Ground reference 31 LNA input 32 Positive supply

Pin Layout Block Diagram

Technical Data Data Sheet Microchip - Data Sheet for RFRXD0420/0920 Application Notes Microchip - PIC12C5XX Application Notes