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Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com UNIVERSAL ISM BAND FSK TRANSCEIVER MODULE RFM12B （the purpose of this spec covers mainly for the physical characteristic of the module, for register configure and its related command info please refer to RF12B data sheets General Introduction RFM12B is a low costing ISM band transceiver module implemented with unique PLL. It works signal ranges from 433/868/915MHZ bands, comply with FCC, ETSI regulation. The SPI interface is used to communicate with microcontroller for parameter setting. Features:

  • Low costing, high performance and price ratio
  • Tuning free during production
  • PLL and zero IF technology
  • Fast PLL lock time
  • High resolution PLL with 2.5 KHz step
  • High data rate (up to 115.2 kbps with internal demodulator，with external RC filter highest data rate is 256 kbps)
  • Differential antenna input/output
  • Automatic antenna tuning
  • Programmable TX frequency deviation (from 15 to 240 KHz)
  • Programmable receiver bandwidth (from 67 to 400 kHz)
  • Analog and digital signal strength indicator (ARSSI/DRSSI)
  • Automatic frequency control (AFC)
  • Data quality detection (DQD)
  • Internal data filtering and clock recovery
  • RX synchron pattern recognition
  • SPI compatible serial control interface
  • Clock and reset signal output for external MCU use
  • 16 bit RX Data FIFO
  • Two 8 bit TX data registers
  • Standard 10 MHz crystal reference
  • Wakeup timer
  • 2.2V – 3.8V power supply
  • Low power consumption
  • Standby current less than 0.3uA
  • Supports very short packets (down to 3 bytes) RFM12B

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com Typical Application：

  • Remote control
  • Remote sensor
  • Wireless data collection
  • Home security system
  • Toys
  • Tire pressure monitoring system Pin Definition： S M D D I P definition Type Function nINT/VDI DI/ DO Interrupt input (active low)/Valid data indicator VDD S Positive power supply SDI DI SPI data input SCK DI SPI clock input nSEL DI Chip select (active low) SDO DO Serial data output with bus hold nIRQ DO Interrupts request output（active low） FSK/DATA/nFFS DI/DO/DI Transmit FSK data input/ Received data output (FIFO not used)/ FIFO select DCLK/CFIL/FFIT DO/AIO/DO Clock output (no FIFO )/ external filt er capacitor(analog mode)/ FIFO interrupts(active high)when FIFO level set to 1, FIFO empty interruption can be achieved CLK DO Clock output for external microcontroller nRES DIO Reset output（active low） GND S Power ground Electrical Parameter： Maximum（not at working mode） symbol parameter mi nimum maximum Unit Vdd Positive power supply -0.5 6.0 V Vin All pin input level -0.5 Vdd+0.5 V

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com Iin Input current except power -25 25 mA ESD Human body model 1000 V Tst Storage temperature -55 125 ℃ Tld Soldering temperature(10s) 260 ℃ Recommended working range symbol parameter mi nimum maximum Unit Vdd Positive power supply 2.2 3.8 V Top Working temperature -40 85 ℃ DC characteristic symbol parameter Remark mi nimum typical maximum Unit Idd_TX_0 Supply current (TX mode, Pout = 0dBm) 315,433MHz band 868MHz band 915MHz band mA Idd_TX_PMAX Supply current (TX mode, Pout = Pmax) 315,433MHz band 868MHz band 915MHz band mA Idd_RX Supply current (RX mode) 315,433MHz band 868MHz band 915MHz band mA Ix Idle current Crystal oscillator on 0.62 1.2 mA Ipd Sleep mode current A ll blocks off 0.3 uA Ilb Low battery detection 0.5 uA Vlb Low battery detect threshold 0.1V per step 2.2 3.7 V Vlba Low battery detection accuracy 0 5 % Vil Low level input 0.3*V dd V Vih High level input 0.7*V dd V Iil Leakage current V il=0V -1 1 uA Iih Leakage current V ih=Vdd, Vdd=5.4V -1 1 uA Vol Low level output I ol=2mA 0.4 V Voh High level output I oh=-2mA V dd-0.4 V AC characteristic symbol parameter remark min typical max Unit fref PLL frequency 9 10 11 MHz fLO frequency (10MHz crystal used) 433 MHz band,2.5KHz step

868 MHz band,5KHz step

915 MHz band,7.5KHz step 430.24 860.48 900.72 439.7 879.5 929.2 MHz

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com fLO frequency (9MHZ crystal used) 433 MHz band,2.5KHz step 915 MHz band,7.5KHz step 387.22 774.43 810.65 395.7 791.5 836.3 MHz f LO frequency (11MHZ crystal used) 433 MHz band,2.5KHz step 915 MHz band,7.5KHz step 473.26 946.53 990.79 483.7 967.4 1022. MHz BW Receiver bandwidth mode 0 mode 1 mode 2 mode 3 mode 4 mode 5 120 180 240 300 360 134 200 270 350 400 150 225 300 375 450 KHz tlock PLL lock time After 10MHz step hopping, frequency error <10 kHz 30 us tst, P PLL startup time With a running crystal oscillator 200 300 us BR Data rate With internal digital demodulator 0.6 115.2 kbps BRA Data rate With external RC filter 256 kbps BER 10-3, BW=134KHz,BR=1.2kbps, 433MHz band -109 -100 BER 10-3, BW=134KHz,BR=1.2kbps, 868MHz band -105 -100 Pmin sensitivity BER 10-3, BW=134KHz,BR=1.2kbps, 915MHz band -105 -100 dBm AFCrange AFC working range dfFSK : FSK deviation in the received signal 0.8* dfFSK RSA RSSI accuracy ±5 dB RSR RSSI range 46 dB CARSSI ARSSI filter 1 nF RSSTEP RSSI programmable step 6 dB RSRESP DRSSI response time RSSI output high after valid , CARRSI=5nF 500 us

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com AC characteristic(Transmitter) symbol parameter remark min typical max Unit 433MHz band 3 5 868MHz band 2 4 Pmax Max. available output power 915MHz band 2 4 dBm Pout Typical output power Selectable in 3 dB steps Pmax-21 P max dbm Co Output capacitance (set by the automatic antenna tuning circuit) In low bands In high bands 2.1 2.6 2.7 3.2 3.3 pf Qo Quality factor of the output capacitance In low bands In high bands Lout Output phase noise 100 kHz from carrier

1 MHz from carrier

-80 -103 dbc/HZ BRTX FSK bit rate Via internal TX data register 172 kbps BRATX FSK bit rate TX data connected to the FSK input 256 kbps dffsk FSK frequency deviation Programmable in 15 kHz steps 15 240 kHZ AC characteristic(Turn-on/Turnaround timings) symbol parameter remark min typical max Unit Tst Crystal oscillator startup time Crystal ESR < 100 1 5 ms Ttx_XTAL_ON Transmitter turn-on time Synthesizer off, crystal oscillator on with 10 MHz step 250 us Trx_XTAL_ON Receiver turn-on time Synthesizer off, crystal oscillator on with 10 MHz step 250 us Ttx_rx_SYNT_ON Transmitter – Receiver turnover time Synthesizer and crystal oscillator on during TX/RX change with 10 MHz step 150 us Trx_tx_SYNT_ON Receiver – Transmitter turnover time Synthesizer and crystal oscillator on during RX/TX change with 10 MHz step 150 us Cxl Crystal load capacitance Programmable in 0.5 pF steps, tolerance+/- 10% 8.5 16 pf tPOR Internal POR timeout After V dd has reached 90% of final value 100 ms tPBt Wake-up timer clock period Calibrated every 30 seconds 0.96 1.05 ms Cin, D Digital input apacitance 2 pf tr, f Digital output rise/fall time 15pF pure capacitive load 10 ns

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com Field testing range Band Test condition Distance 433MHz band Receiver bandwidth =67KHz, data rate=1.2kbps, transmitter frequency deviation =45KHZ（matches with RFM12）In free open area >200M 868MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency deviation =45KHZ（matches with RFM12）in free open area >200M 915MHz band Receiver bandwidth=67KHz,data rate =1.2kbps,Transmitter frequency deviation =45KHZ（matches with RFM12）in free open area >200M SGS Reports

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com Mechanical Dimension （units in mm） SMD PACKAGE（S1） SMD PACKAGE（S2）

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com DIP PACKAGE（D）

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com Module Model Definition model=module type+operation band+module package type+ core chip package type RFM12B – 433 D P module type operation band module package type core chip package type example： 1，RFM12B-433D : RFM12B module at 433MHz band, DIP module, die chip. 2，RFM12B-433DP : RFM12B module at 433MHz band, DIP module, package chip. 3，RFM12B-868S1 : RFM12B module at 868MHZ band, SMD module, thickness at 4.2mm,die chip. 4，RFM12B-868S1P: RFM12B module at 868MHZ band, SMD module, thickness at 4.2mm, package chip. 5，RFM12B-915S2 : RFM12B module at 915MHZ band, SMD module, thickness at 2.2mm,die chip. 6，RFM12B-915S2P: RFM12B module at 868MHZ band, SMD module, thickness at 4.2mm, package chip. Module model operation band module package type core chip package type RFM12B-433D 433MHz DIP Die RFM12B-433DP 433MHz DIP 16pin TSSOP RFM12B-433S1 433MHz SMD, thickness at 4.2mm Die RFM12B-433S1P 433MHz SMD, thi ckness at 4.2mm 16pin TSSOP RFM12B-433S2 433MHz SMD, thickness at 2.2mm Die RFM12B-433S2P 433MHz SMD, thi ckness at 2.2mm 16pin TSSOP RFM12B-868D 868MHz DIP Die RFM12B-868DP 868MHz DIP 16pin TSSOP RFM12B-868S1 868MHz SMD, thickness at 4.2mm Die RFM12B-868S1P 868MHz SMD, thi ckness at 4.2mm 16pin TSSOP RFM12B-868S1 868MHz SMD, thickness at 2.2mm Die RFM12B-868S1P 868MHz SMD, thi ckness at 2.2mm 16pin TSSOP RFM12B-915D 915MHz DIP Die RFM12B-915DP 915MHz DIP 16pin TSSOP RFM12B-915S1 915MHz SMD, thickness at 4.2mm Die RFM12B-915S1P 915MHz SMD, thi ckness at 4.2mm 16pin TSSOP RFM12B-915S2 915MHz SMD, thickness at 2.2mm Die RFM12B-915S2P 915MHz SMD, thi ckness at 2.2mm 16pin TSSOP A l l R F M 1 2 B m o d u l e m o d e l a n d d e s c r i p t i o n

Datasheet REV2.0 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com HOPE MICROELECTRONICS CO.,LTD Add:4/F, Block B3, East Industrial Area, Huaqiaocheng, Shenzhen, Guangdong, China Tel: 86-755-82973805 Fax: 86-755-82973550 Email: sales@hoperf.com trade@hoperf.com Website: http://www.hoperf.com http://www.hoperf.cn http://hoperf.en.alibaba.com This document may contain preliminary information and is subject to change by Hope Microelectronics without notice. Hope Microelectronics assumes no responsibility or liability for any use of the information contained herein. Nothing in this document shall operate as an express or implied license or indemnity under the intellectual property rights of Hope Microelectronics or third parties. The products described in this document are not intended for use in implantation or other direct life support applications where malfunction may result in the direct physical harm or injury to persons. NO WARRANTIES OF ANY KIND, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MECHANTABILITY OR FITNESS FOR A ARTICULAR PURPOSE, ARE OFFERED IN THIS DOCUMENT. ©2006, HOPE MICROELECTRONICS CO.,LTD. All rights reserved.