RPM871-H7 photo link module rev.b 1/7 irda infrared communication module RPM871-H7 RPM871-H7 is an infrared communication module for irda v e r . 1.2 (low pow e r). t he in frared led, pin photo diode, w a veform shaping lsi are all integrated into a single p a ck age. t h is module is designed w i th pow er dow n function and low current consumption at st and-by mode. t he ultra small p a ckage makes it a perfect fit for mobile devices. z f eatu r es 1) applied to irda version 1.2. (low pow e r) 2) designed for low pow er consumption at st and-by for receiving (t y p .73 a). 3) suit able for set s driven by battery due to pow er dow n control function. 4) pow e r supply volt age range : 2.6v to 3.6v 5) const ant led load resist ance can c hange communication range. (approx. 20 to 60cm) z a pplic a t ions cellular phones, pdas, etc. z a b solute maximum ratings (t a = 25 c) parameter symbol limits unit power supply voltage v cc ? 0.3 to + 7.0 ? 20 to + 85 ? 30 to + 100 v ma mw 200 ? 2 150 ? 1 operating temperature range storage temperature range led peak current power dissipation topr tstg i fp pd c c ? 1 70mm 70mm, t=1.6mm, glass epoxy mounting. derating : 2mw/ c for operation above ta=25 c ? 2 led peak current < 90 s. on duty < 20% z re c o mme nde d ope ra ting c onditions (t a = 25 c) parameter symbol min. typ. max. unit power supply voltage v cc 2.8 v 2.6 3.6 v leda 2.8 v 2.6 5.5
RPM871-H7 photo link module rev.b 2/7 z bloc k dia g ra m a nd a pplic a t ion c i rc uit amp 1 8 76543 2 amp amp power down led driver v cc v cc gnd c1 r1 gnd nc gnd pwdown rxd txd leda pwdown rxd txd (ledv cc ) v cc (3pin) and vleda (8pin) can be used on either common power source or different one.
RPM871-H7 photo link module rev.b 3/7 z t e rmin a l d escrip tio n terminal circuit function pin no 1, 4 gnd gnd pin1 and pin4 must be connected to the ground. this terminal must be left open. connect to ground. power-down control terminal cmos logic level input when input is h, it will stop the receiving circuit, pin-pd current and transmitting led operation. h : powerdown l : operation receiving data output terminal cmos logic level output when pwdown (5pin)=h, the rxd output will be pulled up to v cc at approximately 300k ? . transmitting data input terminal h : led (pwdown=l) cmos logic level input holding txd="h" status, led will be turn off approximately 45 s. led anode terminal other power source can be used difference between ledv cc and v cc . led current depends on led load resistance value. 2n c pwdown rxd txd leda shield case 3 5 6 7 8 ? v cc v cc for preventing from infection, connect a capacitor between v cc (3pin) and gnd (4pin). v cc v cc 200k led v cc v cc 300k pwdown
RPM871-H7 photo link module rev.b 4/7 z electrical ch aracteristics (unless otherw i se noted, v cc =2.8v , vledv cc =2 .8 v , t a =2 5 c) parameter symbol min. typ. max. unit conditions consumption current1 i cc 1 i cc 2 vpdh vpdl ipdh ipdl 73 a stand-by for receiving at no input light pwdown pin high at no input light pwdown = v cc [v] consumption current2 transmission rate pwdown input high voltage pwdown input low voltage pwdown input high current pwdown input low current txd input high voltage txd input low voltage rxd output high voltage rxd output rise time rxd output fall time rxd output pulse width receiver latency time rxd output low voltage txd input high current txd input low current led anode current ? 0.01 ? ? ? 2.4 ? ? v cc ? 0.55 99 a 0.2 kbps 115.2 v v ? 0.55 vtxh vtxl itxh itxl ileda vrxh vrxl trr tfr trt twrxd pwdown = 0 [v] txd = v cc [v] txd = 0 [v] r1 = 7.5 [ ? ] 0 ? 1.0 v cc ? 0.55 ? 7 ? 1.0 ? ? ? ? 1.5 ? v cc ? 0.5 0 ? 1.0 ? ? 14 0 144 ? ? 70 30 2.3 100 a 1.0 a 1.0 v v a a ma v v ns ns s s ? 0.55 28 1.0 ? ? 0.4 ? ? 3.6 300 irxh = ? 50 a irxl = 200 a c l = 15pf c l = 15pf c l = 15pf, 2.4 to 115.2kbps z op tical ch aracteristics (unless otherw i se noted, v cc =2.8v , vledv cc =2 .8 v , t a = 2 5 c) parameter symbol min. typ. max. unit conditions peak wave length 1. this product is not designed for protection against radioactive rays. 2. this product dose not include laser transmitter. 3. this product includes one pin photo diode. 4. this product dose not include optical load. p ie1 l/2 d/2 tledmax tr/tf tj ee 870 nm ? 15 ? l 15 r1 = 7.5 [ ? ] ? 15 ? l 15 txd = v cc 10% to 90% intensity1 half-angle rise time / fall time optical over shoot edge jitter irradiance in angular input half-angular maximum emitting time 850 36 14.4 ? 18 ? ? 900 mw/sr 93.6 mw/cm 2 deg ns deg s 30 100 ? ? ? ? ? 45 ? 40 0.0068 15 10 % 25 ns 40 500 ? 96
RPM871-H7 photo link module rev.b 5/7 z t i min g ch art less than 45 s (emitting) more than 45 s approximately 45 s less than 2.3 s more than 2.3 s approximately 2.3 s approximately 2.3 s pull up to v cc at approximately 300k ? (emitting) (emitting) (emitting side) (detecting side) txd (7pin) internal led (light output) light input rxd (6pin) pwdown (5pin) z a t t a c h e d c o mpone nt s recommended values part symbol c1 recommended value notice 1 f, tantalum or ceramic ex.) tcfga1a105m8r (rohm) bigger capacitance is recommended with much noise from power supply r1 7.5 ? 5%, 1/4w (vledv cc = 2.8v) more than 60cm distance, more than 4[ w/cm 2 ] at detecting side. (vs ver1.0) more than 46cm distance, more than 6.8[ w/cm 2 ] at detecting side. (vs RPM871-H7) in case of using r1 w i th dif f erent conditi on from the above, formula is as follow s : led resist ance value : r1[ ? ], led average consumption current : iled[ma], supply volt age : vledv cc [v], link dist ance : d[cm] (including led? s distribution w i thin 15deg) r1=t (vledv cc ? 1.45) / d 2 ? 3.5 [ ? ] iled=duty (vledvcc ? 1.36) / (r1 + 2.5) [a] duty : led duty at emitting t : 17300 (vs. RPM871-H7), 29400 (vs. ver1.0) ? please set up to be iled / duty < 200[ma] (duty < 20%)
RPM871-H7 photo link module rev.b 6/7 z no tes 1) ledv cc (8pin) and v cc (3pin) ? other pow er source can be used dif f erence betw een ledv cc and v cc . 2) caution in designing board lay - out t o get maximum potential from RPM871-H7, please keep in mind follow i ng instruction. ? t he line of rx d (6pin) should be connected at backside via th rough hole close to RPM871-H7 pin lead. better not to be close to photo diode side (1pin). ? t h is is to minimize feedback supplied to photo diode from rxd. ? as for c1 betw een 3-4 pin should be placed close to RPM871-H7. ? better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also aw ay from the p a rt s w h ich generates noise, such as dc / dc converter . 3) others ? please be sure to set up the t x d (7pin) input to be ?l? (under 0.55v) except transmitting dat a (for < 90 sec. on duty < 20%). ? pow e r dow n current might increase if exposed by strong light (ex. dire ct sunlight) at pow er dow n mode. ? please use by the signal format w h ich is specified by irda v e r1.2 (2.4k to 1 15.2kbp s). t here might be on error if used by dif f erent signal format. ? dust or dirt on lens portion may af fect the c haracteristics, so p a y suf f icient attention. 4) led current derating and ambient temperature t he relation betw een led peak current and maxi mum ambient temperature is show n below . w e recommend y ou to use w i thin the range as indicated in below . a) w hen glass-epoxy board (70 70 1.6mm) mounted. ? 2 0 0 2 04 06 08 0 1 0 ambient temperature : ta ( c) 0 maximum led pack current : iledp (ma) 50 100 150 200 250 0 duty = 10% duty = 20% b) RPM871-H7 ? 2 0 0 2 04 06 08 0 1 0 ambient temperature : ta ( c) 0 maximum led pack current : iledp (ma) 50 100 150 200 250 0 duty = 10% duty = 20%
RPM871-H7 photo link module rev.b 7/7 z ex te rna l dime ns ions (unit : mm) 0.15 1.0 2.2 pin pd 1.1 1.4 1.75 2.20.2 2.2 2.8 4.0 8.0 2.85 r1.1 18 r1.1 p0.95 7 = 6.65 0.35 2.9 2.9 2.2 0.15 0.8 0.7 2.55 led rslp8 (h7)
appendix appendix1-rev1.1 the products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. notes no technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of rohm co.,ltd. the contents described herein are subject to change without notice. the specifications for the product described in this document are for reference only. upon actual use, therefore, please request that specifications to be separately delivered. application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. rohm co.,ltd. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by rohm co., ltd. is granted to any such buyer. products listed in this document are no antiradiation design. about export control order in japan products described herein are the objects of controlled goods in annex 1 (item 16) of export trade control order in japan. in case of export from japan, please confirm if it applies to "objective" criteria or an "informed" (by miti clause) on the basis of "catch all controls for non-proliferation of weapons of mass destruction.
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