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RFM68W tel: +86-755-82973805 fax: +86-755-82973550 e-ma il: sales@hoperf.com http://www.hoperf.com 1 RFM68W low cost ism transmitter module v1.2 features general description the RFM68W is an ultra-low-cost, fsk or ook transmitter module suitable for operation in the 315, 433, 868 and 915 mhz licence free ism bands., the RFM68W may be used without the requirement for configuration via an mcu. however, in conjunction with a microcontroller, the communication link parameters may be re-configured. including, output power, modulation format and operating channel. the RFM68W offers integrated radio performance with cost efficiency and is suited for operation in north america fcc part 15.231, fcc part 15.247 dts and fhss modes,15.249, and europe en 300 220. in order to better use RFM68W modules, this specification also involves a large number of the parameters and functions of its core chip rf68's,including those ic pins which are not leaded out. all of these can help customers gain a better understanding of the performance of RFM68W modules, and enhance the application skills. applications ? garage door openers ? low-cost consumer electronic applications ? remote keyless entry (rke) ? remote control / security systems key product features ? +10 dbm or 0 dbm configurable output power ? bit rates up to 100 kbps ? ook and fsk modulation. ? 1.8 to 3.7 v supply range. ? low bom fully integrated tx ? fractional-n pll with 1.5 khz typical step ? frequency agility for fhss modulation ? fcc part 15.247 dts mode compliant ? module size:15x14.5mm RFM68W free datasheet http:///
RFM68W 2 tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com table of contents section page 1. circuit description.................................................................................................................... ................................ 3 1.1. general description ................................................................................................................... ...................... 3 1.2. block diagram........................................................................................................................ .......................... 3 1.3. pin description, ....................................................................................................................... ..................... 4 2. electrical characteristics ............................................................................................................................... .......... 5 2.1. esd notice ............................................................................................................................... ....................... 5 2.2. absolute maximum ratings ............................................................................................................................. 5 2.3. operating range.......................................................................................................................... .................... 5 2.4. electrical specifications................................................................................................................. ...................... 6 3. timing characteristics ............................................................................................................... .............................. 7 4. application modes of the RFM68W......................................................................................................................... ... 8 4.1. transmitter modes ............................................................................................................................... ............ 8 4.2. mode selection flowchart...................................................................................................................... .......... 9 4.3. application mode: power & go . ................................................ ....................... ..................... .......................... 10 4.4. application mode: advanced ......................................................................................................................... 10 4.4.1. advanced mode: configuration............................................................................................................... 10 4.4.2. frequency hopping spread spectrum.................................................................................................... 10 4.5. frequency band coverage ............. ............................. .................. ...................................... .......................... 11 4.6. power consumption.................................................................................................................... ..................... 11 5. RFM68W configuration.................................................................................................................. .......................... 12 5.1. twi access ............................................................................................................................... ....................... 12 5.2. application configuration parameters ..................................................................................................... 14 5.3. frequency configuration parameters ...................................................................................................... 14 5.4. test parameters (internal) .................................................................................................................... ......... 15 5.5. status parameters .................................................................................................................... ..................... 15 5.6. recovery command ..................... ............................ ................. ....................................... .............................. 16 6. application information ................................................................................................................... ....................... 17 6.1. reference design ............................................................................................................................... ........... 17 6.2. nreset pin ............................................................................................................................... .................... 18 6.3. tx_ready pin ............................................................................................................................... ................ 18 6.4. low power optimization .................................................................................................................. ............... 18 6.4.1. 2 connections: ctrl, data ................................................................................................................... 18 6.4.2. 3 connections: ctrl, data, tx_ready .............................................................................................. 18 7. RFM68W packaging ..................................................................................................................... ............................ 19 7.1. s2 package outline drawing ........................................................................................................................... 19 8. ordering information????????????????????????????????????????.20 free datasheet http:///
RFM68W RFM68W 3 tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com this product datasheet contains a detailed descripti on of the RFM68W performance and functionality. 1. circuit description 1.1. general description the RFM68W is a multi-band transmitter module capable of fsk and ook modulation of an input data stream. it contains a frequency synthesizer which is a fractional-n sigma-delta pll. for frequency modulation (fsk), the modulation is made inside the pll bandwidth. for amplitude modul ation (ook), the modulation is performed by turning on and off the output pa. the power amplifier (pa), connected to the rfout pin, can deliver 0 dbm or +10 dbm in a 50 ? load. each of these two output powers need a specific matching network when efficiency needs to be optimized. the circuit can be configured via a simplified twi interface, constituted of pin ctrl and data. the pins of this interface are also used to transmit the modulating data to the module. another key feature of the RFM68W is its low current consumption in transmit and sleep modes and its wide voltage operating range from 1.8 v to 3.7 v. this makes the RFM68W suitable for low-cost battery chemistries or energy harvesting applications. 1.2. block diagram the figure below shows the simplified block diagram of the RFM68W free datasheet http:///
RFM68W RFM68W 4 tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 1.3. pin description table 1 description of the RFM68W pin diagram (top) pin description number name type description 1 gnd i exposed pad, ground 2 vcc i power supply 1.8v to 3.7v 3 nc - connect to gnd 4 nc - connect to gnd 5 gnd i exposed pad, ground 6 ant o transmitter rf output 7 gnd i exposed pad, ground 8 nreset i reset (optional, can be left floating) 9 data i/o transmit or configuration data 10 ctrl i config selection configuration data clock 11 gnd i exposed pad, ground 12 tx_ready o transmitter ready flag (optional, can be left floating) 13 nc - connect to gnd 14 nc - connect to gnd free datasheet http:///
RFM68W RFM68W 5 tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 2. electrical characteristics 2.1. esd notice the RFM68W is an electrostatic discharge sensitive device. it satisfies clas s 2 of the jedec standard jesd22-a114-b (human body model) on all pins. 2.2. absolute maximum ratings stresses above the values listed below may cause permanent device failure. exposure to absolute maximum ratings for extended periods may affect device reliability. table 2 absolute maximum ratings symbol description min max unit vddmr supply voltage -0.5 3.9 v tmr temperature -55 115 c tjunc junction temperature -55 125 c ts t o r storage temperature -55 150 c 2.3. operating range operating ranges define the limits for functional operation and th e parametric characteristics of the device as described in this section. functionality outside these limits is not implied. table 3 operating range symbol description min max unit vddop supply voltage 1.8 3.7 v to p operational temperature range -40 85 c clop load capacitance on digital ports - 25 pf free datasheet http:///
RFM68W RFM68W 6 tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 2.4. electrical specifications the table below gives the electrical specifications of the tr ansmitter under the following conditions: supply voltage = 3.3 v, temperature = 25 c, f xosc = 26 mhz, f rf = 915 mhz, 2-fsk modulation with fdev=+/-10 khz, bit rate = 10 kbit/s and output power = +10 dbm terminated in a matched 50 ohm impedance, unless otherwise specified. table 4 transmitter specifications symbol description conditions min typ max unit current consumption iddsl supply current in sleep mode - 0.5 1 a iddt_315 supply current in transmit mode at 315 mhz* rfop=+10dbm 50% ook rfop=+10dbm fsk rfop=0dbm fsk - - - 11 15 9 - - - ma ma ma iddt_915 supply current in transmit mode at 915 mhz* rfop=+10dbm fsk rfop=0dbm fsk - - 17.5 10.5 - - ma ma rf and baseband specifications band0,for 315mhz module 312 380 mhz band0,for 433mhz module 380 450 mhz band0,for 868mhz module 860 870 mhz fband operation frequency bands band1,for 915mhz module 902 928 mhz fda frequency deviation, fsk 10 - 200 khz brf bit rate, fsk permissible range 0.5 - 100 kbps bro bit rate, ook permissible range 0.5 - 10 kbps ook_b ook modulation depth - 45 - db rfop rf output power in 50 ohms in either frequency band high power setting low power setting* 7 -3 10 0 - - dbm dbm rfopfl rf output power flatness from 315 to 380 mhz, 50 ohms load - 2 - db drfopv variation in rf output power with supply voltage 2.5 v to 3.3 v 1.8 v to 3.7 v - - - - 3 7 db db phn transmitter phase noise at offset: 100 khz 350 khz 550 khz 1.15 mhz - - - - -82 -92 -96 -103 -76 -81 -91 -101 dbc/hz dbc/hz dbc/hz dbc/hz step_22 rf frequency step fxosc = 24 mhz,for 315mhz module - 1.46484 - khz step_26 rf frequency step fxosc = 26mhz, for 433,868mhz module - 1.58691 - khz step_26 rf frequency step fxosc = 26mhz, for 915mhz module 3.17383 - khz free datasheet http:///
RFM68W RFM68W 7 tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com symbol description conditions min typ max unit fxosc crystal oscillator frequency for 315mhz module for 433,868,915mhz module 24 26 mhz mhz dfxosc frequency variation of the xosc no crystal contribution - - +/-25 ppm timing specifications ts_tr time from sleep to tx mode xtal dependant, with spec?d xtal - 650 2000 us ts_hop0 channel hop time in band 0 315 to 390 mhz - 250 500 us ts_hop1 channel hop time in band 1 maximum hop of 26 mhz*** - 200 400 us tofft timer from tx data activity to sleep programmable - - 2 20 - - ms ms ramp pa ramp up and down time - 20 - us t_start time before ctrl pin mode selection. time from power on to sampling of ctrl ** - 200 us + ts_osc - ms * with different matching networks ** the oscillator startup time, ts_osc, depends on the electrical characteristics of the crystal *** from the last ctrl falling edge of the frequency change instruction to transmitter ready (pa ramp up finished) 3. timing characteristics the following table gives the operating specifications for the twi interface of the RFM68W. table 5 serial interface timing specifications symbol description conditions min typ max unit f ctrl ctrl clock frequency - - 10 mhz t ch ctrl clock high time 45 - - ns t cl ctrl clock low time 45 - - ns t rise ctrl clock rise time - - 5 ns t fall ctrl clock fall time - - 5 ns t setup data setup time from data transition to ctrl rising edge 45 - - ns t hold data hold time from ctrl rising edge to data transition 45 - - ns t 0 , t 2 time at ?1? on data during recovery command see figure 9 and figure 10 - - 5 us t 1 time at ?0? on data during recovery command see figure 10 5 - - us free datasheet http:///
RFM68W RFM68W 8 tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 4. application modes of the RFM68W pins ctrl and data are used for both configuring the circuit and sending the data to be transmitted over the air. two different modes are associated to these pins, ? power&go ? and ? advanced ? modes. 4.1. transmitter modes automatic mode operation is described in figure 2. here we see that a rising edge on the data pin activates the transmitter start-up process. data must be held high for the start-up time (ts_tr) of the RFM68W. during this time the RFM68W undergoes an optimized, self-calibrating trajectory from sleep mode to transmit mode. once this time has elapsed, the RFM68W is ready to transmit. any logical sign al subsequently applied to the data pin is then transmitted. figure 2. ?power & go? mode: transmitter timing operation the transition back to sleep mode is managed automatically. t he RFM68W waits for tofft (2 or 20 ms) of inactivity on data before returning to sleep mode. in forced transmit mode the circuit can be forced to wake up an d go to tx mode by sending an application instruction through the twi interface, and se tting the mode bit da(15) to ?1?. once in transmit the circuit will transmit over the air the data stream presented on the data pin. the circuit will stay in transmit mode until a new application instruction is sent with da(15) to ?0?. figure 3. forced transmit mode description free datasheet http:///
RFM68W RFM68W 9 tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 4.2. mode selection flowchart circuit start-up wait t_start logic ?0? check ctrl pin logic ?1? power & go 1 868.3 mhz fsk, fdev=+/-19.2khz +10dbm power & go 2 433.92 mhz ook +10dbm ctrl clock signal advanced mode full register flexibility automatic or forced transmit figure 4. RFM68W mode selection note advanced mode is entered only if data is held low during ctrl?s rising edge. when powering up the circuit (microcontroller and RFM68W), the lo gic level of the ctrl pin is sampled after t_start, as described on figure 5. during t_start, the microcontrolle r io driving the ctrl pin must be configured as an output, driving the ctrl pin to the desired state. figure 5. power-up timing free datasheet http:///
10 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 4.3. applicati on mode: power &go the default ?power & go? application mode sees the RFM68W configured as detailed in table 6. by changing the logical state of the ctrl pin at power-up or reset, two distinct configuration modes can be selected. the power & go application modes hence permit microcontroller-less operation. table 6 configuration in power & go mode ctrl pin configuration mode ?low? fsk 868.3 mhz, +10 dbm, fdev=+/-19.2 khz power&go 1 ?high? ook 433.92 mhz, +10 dbm power&go 2 4.4. application mode: advanced 4.4.1. advanced mode: configuration as described on figure 4, advanced mode is entered when accessing the two wire interface (twi) bus of the RFM68W. upon communication to the register at up to 10 mhz of clo cking speed, complete flexibility on the use of the module is obtained. once all register settings are selected (see registers detailed de scription in section [5]), the RFM68W can be used either in automatic mode by simply toggling the data pin, or in forced transmit mode to optimize timings for instance. 4.4.2. frequency hopping spread spectrum frequency hopping is supported in advanced mode. after sending the data stream in the first channel, the user can send a frequency change instruction containing the new channel frequ ency. the circuit will automatically ramp down the pa, lock the pll to the new frequency, and turn the power amplifier back on. the user can then send his packet data on the new channel. timings are detailed hereafter: t < tofft (2 or 20 ms) twi instruction t < tofft (2 or 20 ms) data frequency change ctrl frequency change rfout 5th falling edge on ctrl 24th falling edge on ctrl tx channel a ts _ho p i tx channel b figure 6. frequency hopping description notes - during any twi access, the input of the modulator is inhibited - the time between two frequency change instructions shall be greater than ts_hopi - fhss modulation, as described under fcc part 15.247, is supported by the RFM68W; also note that the large frequency deviation settings available on the RFM68W make it suitable for ?digitally modulated systems?, as described under fcc part 15.247 (a)(2) free datasheet http:///
11 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 4.5. frequency band coverage the RFM68W offers several combinations or frequency references an d frequency outputs, allowing for maximum flexibility and design of multi-band products: table 7 frequency selection table reference frequency fxosc band setting da(13) upper / lower frequency bounds fstep frf & fdev 22 mhz 310 to 450 mhz 22 x 10 6 fste p = ----------------- = 1.34277 khz 2 14 24 mhz 312 to 450 mhz 24 x 10 6 fste p = ----------------- = 1.46484 khz 2 14 0 338 to 450 mhz 26 x 10 6 fste p = ----------------- = 1.58691 khz 2 14 26 mhz 1 860 to 870 mhz and 902 to 928 mhz 6 fstep = 2 --- 6 ---- x --- 1 --- 0 ---- = 3.17383 khz 2 13 frf = df ( 18;0 ) fstep f de v = da ( 12;5 ) fstep 4.6. power consumption the following typical power consumption figures are observed on the RFM68W kits. note that the transmitter efficiency depends on the impedance matching quality, and can be pcb design dependant. the pa matching may be different in each frequency band. table 8 power consumption in tx mode frequency band conditions typical current drain 310 to 450 mhz pout=+10dbm, ook modulation with 50% duty cycle pout=+10dbm, fsk modulation pout=0dbm, fsk modulation 11 ma 15 ma 9 ma 860 to 870 mhz pout=+10dbm, fsk modulation pout=0dbm, fsk modulation 16.5 ma 10 ma 902 to 928 mhz pout=+10dbm, fsk modulation pout=0dbm, fsk modulation 17.5 ma 10.5 ma free datasheet http:///
12 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 5. RFM68W configuration the RFM68W has several configuration parameters which can be selected through the serial interface 5.1. twi access as long as ctrl is kept stable, the data pin is considered by the circuit as the input for the data to be transmitted over the air (power&go modes). programming of the configuration register is triggered by a rising edge on the ctrl line. upon detection of this rising edge, the data applied to the data pin is accepted as register config uration information, the data bits are clocked on subsequent rising edges of the clocking signal applied to the ctrl pin. the timing for RFM68W configuration register ?write? is shown in figure 7. note that, once triggered, all 24 cl ock cycle must be issued to the RFM68W. ctrl data 1st 2nd 23rd 24 t h data pin is an input figure 7. twi configuration register ?write?. the registers may, similarly, be read using the timing of figure 8. ctrl data 1st 2nd 8th 24th data pin is an output data pin is an input figure 8. twi configuration register ?read?. the first rising edge on ctrl which initiates the advanced mode must occur at least 1 ms after the circuit has been powered up or reset. free datasheet http:///
13 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com table 9 twi instruction table byte 0 byte 1 byte 2 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 instruction 0 0 0 0 (0000) da(15:0) write application bits 0 0 0 1 1 df(18:0) write frequency bits 0 0 1 0 (0)(0010)(0010) dt(10:0) write test bits (pad protected) 0 0 1 1 (0011) da(15:0) read application bits 0 1 0 0 (0100) df(15:0) read the 16 least significant frequency bits 0 1 0 1 (0101) ds(12:5) ds(4:0) df(18: 16) read chip version, status and 3 most significant frequency bits 0 1 1 0 (0110) ds(28:13) read bist signature 0 1 1 1 (0111) (1111)(1) dt(10:0) read tes t bi ts 1 x discarded , not an instruction all 1 recovery instruction notes - the first ?0? transmitted to the RFM68W is required to initialize communication - the following 3 bits (highlighted in blue) determine the type of instruction - the forthcoming bits (highlighted in green) define a protec tion pattern; any error in these bits voids the instruction free datasheet http:///
14 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 5.2. application configuration parameters name number description power &go 1 power &go 2 mode da(15) mode: 0 automatic mode 1 forced transmit mode 0 modul da(14) modulation scheme: 0 fsk 1 ook 0 1 band da(13) band 0, 310 to 450 mhz band 1, 860 to 870 mhz and 902 to 928 mhz 1 0 fdev da(12:5) rf frequency deviation in fsk mode only see table 7 for details 0x06 fdev= +/-19.2khz unused pout da(4) output power range: 0 0 dbm 1 10 dbm 1 1 tofft da(3) period of inactivity on data before RFM68W enters sleep mode in automatic mode: 0 2 ms 1 2 0 0 1 res da(2:0) reserved 100 100 table 10 application configuration parameters note all changes to the application parameters must be performed when the device is in sleep mode, with the exception of da(15). mode can be sequentially written to ?1?, and then ?0? while the device is in transmit mode, to speed up the turn off process and circumvent the tofft delay. 5.3. frequency configuration parameters name number description power &go 1 power &go 2 frf df(18:0) rf operating frequency see table 7 for details 0x42cad frf=868.3 mhz with 26 mhz reference 0x42c1c frf=433.92 mhz with 26 mhz reference table 11 frequency configuration parameters if done in sleep mode, the frequency change instruction will be applied next time the RFM68W is turned on. if frequency change occurs during transmission, the automated frequency hopping sequence described in section [4.4.2] will take place. free datasheet http:///
15 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 5.4. test parameters (internal) ten test bits dt(9:0) exist in the RFM68W. they are only use fo r the industrial test of the device, and therefore they are pad protected. it means that their value cannot be modified withou t applying a specific logical level to some of the RFM68W pads during a write access. 5.5. status parameters ds(12:5) are read-only bits, organized as follows: name number description default advanced mode power &go 1 power &go 2 res ds(28:13) reserved - chip version ds(12:5) chip identification number ?0001 0001? --> v1a res ds(4:0) reserved - table 12 status read-only parameters free datasheet http:///
16 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 5.6. recovery command in the event of spurious activity (less than 24 clock cycles received) on the ctrl pin, control over the twi interface can be recovered in two possible ways: t2 recovery command data ctrl 1st rising edge on ctrl 24th rising edge on ctrl figure 9. quick recovery command t1 t0 data ctrl 1st rising edge 24th rising edge figure 10. pulsed recovery command notes - if t2 < 5 us, the RFM68W will not turn into tx mode during the recovery command (if not previously in tx mode) - if t1 < 5 us, with t0 > 5 us, the RFM68W will not turn into tx mode in the second scenario of recovery command - during the pulsed recovery command, t0 timing does not have any upper limit - if t1 or t2 exceeds 5us, the recovery command will still be successful, but the transmitter will momentarily turn on free datasheet http:///
17 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 6. application information 6.1. reference design figure 11:typical application schematic free datasheet http:///
18 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 6.2. nreset pin when required, the pin nreset can be c ontrolled externally, to allow for: ? either a delayed power on reset (por) cycle of the RFM68W, allowing for the companion micro to reset and assign its port directions. this is achieved by connecting a r/c time constant to the nreset pin. ? or an on-the-go reset of the RFM68W at any moment in time, if required by the application. this is achieved by pulling the nreset pin low for more than 10 0 microseconds, then releasing it to high impedance (normal termination). 6.3. tx_ready pin for timing critical applications, tx_ready pin can be useful to know precisely when the transmitter is ready for operation, and therefore save energy. to this end, tx_ready can optio nally be connected to inform the companion device that the pa ramp up phase has been terminated, hence the RFM68W is ready for data transmission. 6.4. low power optimization the RFM68W is designed to reduce the cost of the rf transmitter functionnality. to this end, a single data signal can be enough to operate the transmitter, in any of the two power & go modes. in this situation, ts_start and tofft timings, tabulated in section 2.4, must be respect ed, leading to significant periods of time during which the transmitter is on and no valuable information is transmitted. for more demanding applications where energy usage is critical, the RFM68W offers hardware and software support to accurately control the transmitter on time, and therefore save energy: 6.4.1. 2 connections: ctrl, data if the two signals of the twi interface can be controlled by the host microcontroller, tx on time can be accurately controlled as follows: ? at the device turn on, instead of waiting for ts_tr (2ms max, but very xtal dependant), the status flag tx_ready ? can be polled on the twi interface. as soon as the tx_ready flag is set, the microcontroller can start toggling data to transmit the useful packet. this method is valid in both forced tx and automatic modes. ? at the device turn off, instead of waiting for tofft (2 or 20ms), the user can immediately turn off the transmitter after ? the transmission of packet, assuming that the forced transmit mode was selected. 6.4.2. 3 connections: ctrl, data, tx_ready in applications where the number of connections between th e microcontroller and the rf module is less critical, tx_ready pin can be connected to either a gpio port, or an ex ternal interrupt port of the micro. the two optimizations described in the former subsection will also be possibl free datasheet http:///
19 RFM68W RFM68W tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 7. packaging information 7.1. s2 package outline drawing free datasheet http:///
RFM68W rf m68w tel: + 86-755-82973805 fax: + 86- 755-82973550 e-mail: sales@hoperf.com http:/ / www.hoperf.com 8. ordering information RFM68W 433 s2 p/n: RFM68W-315s2 RFM68W module at 315m hz band, smd package p/n: RFM68W-433s2 RFM68W module at 433m hz band, smd package p/n: RFM68W-868s2 RFM68W module at 868m hz band, smd package p/n: RFM68W-915s2 RFM68W module at 915m hz band, smd package hope microelectronics co.,ltd add: 2/f, building 3, pingshan private enterprise science and technology park, lishan road, xili town, nanshan district, shenzhen, guangdong, china tel: 86-755-82973805 fax: 86-755-82973550 email: sales@hoperf.com website: http://www.hoperf.com http://www.hoperf.cn this document may contain prelimi nary 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 doc ument shall operate as an express or implied license or indemnity under t he intellectual property rights of hope microelectronics or third parties. t he 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. RFM68W 20 package op eration ban d mode type free datasheet http:///

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