MRF39RA Low-Power, Integrated UHF Receiver Telecommunications Standards Institute (ETSI) and Features Federal Communications Commission (FCC) High Sensitivity: regulations. - down to -120 dBm at 1.2 kbps High Selectivity: FIGURE 1: MRF39RA RECEIVER: - 16-Tap FIR channel filter LOW-POWER INTEGRATED UHF RECEIVER Bullet-Proof Front End: VBAT1&2 VR ANA VR DIG - IIP3 = -18 dBm, IIP2 = +35 dBm, 80 dB RC Power Distribution System Oscillator blocking immunity, no image frequency LNA response Single to Mixers Modulators Differential RFIN RESET Low Current: SPI - Rx = 16 mA, 100 nA register retention RSSI AFC GND Constant RF Performance over Voltage Range of Division by 2, 4 or 6 Chip DIO0 Tank DIO1 Inductor DIO2 FSK Bit Rates up to 300 kbps Loop Frac-N PLL NC Filter DIO3 Synthesizer DIO4 NC Fully Integrated Synthesizer with a Resolution of DIO5 XO NC 32 MHz 61 Hz XTAL GND FSK, GFSK, MSK, GMSK and OOK Demodulation Built-in Bit Synchronizer Performing Clock Typical Applications Recovery Incoming Sync Word Recognition Automated Meter Reading 115dB+ Dynamic Range Received Signal Wireless Sensor Networks Strength Indicator (RSSI) Home and Building Automation Automatic RF Sense with Ultra-Fast Automatic Wireless Alarm and Security Systems Frequency Control (AFC) Industrial Monitoring and Control Packet Engine with CRC, AES-128 Encryption Wireless M-Bus and 66-Byte First In First Out (FIFO) Built-in Temperature Sensor and Low-Battery Pin Diagram Indicator FIGURE 2: 24-PIN QFN General Description The MRF39RA device is a highly integrated RF 24 23 22 21 20 19 receiver capable of operation over a wide frequency VBAT1 18 NSS 1 range, including the 433, 868 and 915MHz VR ANA 17 MOSI 2 license-free Industry Scientific and Medical (ISM) frequency bands. Its highly integrated architecture VR DIG 3 16 MISO enables for a minimum of external components while XTA 4 15 SCK maintaining maximum design flexibility. All major RF XTB 14 5 GND communication parameters are programmable and RESET 6 13 VBAT2 most of these can be dynamically set. The MRF39RA 7 12 offers the unique advantage of programmable 8 9 10 11 narrow-band and wide-band communication modes without the need of modifying external components. The MRF39RA is optimized for low-power consumption while offering high sensitivity and Markets channelized operation. TrueRF technology enables Europe: EN 300-220-1 a low-cost external component count (elimination of the North America: FCC Part 15.247, 15.249, 15.231 SAW filter) while still satisfying the European Narrow Korean and Japanese Bands 2015 Microchip Technology Inc. DS40001778B-page 1 DIO0 NC DIO1 NC DIO2 GND DIO3 RFIN Decimation and DIO4 GND & Filtering Demodulator & DIO5 NC Bit Synchronizer Packet Engine & 66 Bytes FIFO Control Registers - Shift Registers - SPI InterfaceMRF39RA Table of Contents 1.0 Overview.................................................................................................................................................................................... 3 2.0 Device Description..................................................................................................................................................................... 5 3.0 Operating Modes ..................................................................................................................................................................... 20 4.0 Data Processing....................................................................................................................................................................... 26 5.0 Configuration and Status Registers ......................................................................................................................................... 41 6.0 Application Information ............................................................................................................................................................ 56 7.0 Electrical Specifications ........................................................................................................................................................... 59 8.0 Packaging Information ............................................................................................................................................................. 63 The Microchip Web Site....................................................................................................................................................................... 69 Customer Change Notification Service ................................................................................................................................................ 69 Customer Support................................................................................................................................................................................ 69 Product Identification System .............................................................................................................................................................. 70 TO OUR VALUED CUSTOMERS It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. 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