rpm871-h12 photo link module 1/7 irda infrared communication module rpm871-h12 rpm871-h12 is an infrared communication module for irda ve r. 1.2 (low power). the in frared led, pin photo diode, lsi are all integrated into a single package. this m odule is designed with power down function and low current consumption at stand-by mode. t he ultra small package makes it a perfect fit for mobile devices. z features 1) infrared led, pin photo diode, led driver & receiver fr equency formation circuit built in. improvement of emi noise protection because of shield case. 2) applied to sir (2.4 to 115.2kbps) 3) v cc supply voltage range is from 2.6v to 3.6v. 4) surface mount type. 5) power down function built in. 6) adjustable communication distance by led load resistance value. (approximately 20cm to 60cm) z applications cellular phone, pda, dvc, digital still ca mera, printer, handy terminal etc. z absolute maximum ratings (ta=25 c) parameter symbol limits unit supply voltage v max 7.0 ?1 ?20 to +85 ?30 to +100 v ma v 200 ?2 ?0.3 to vcc+0.3 operation temperature storage temperature led peak current input voltage topr tstg i fp mw 150 ?3 power dissipation pd v in c c ?1 this applies to all pins basis ground pins (1.4pin) ?2 led peak current<90s. on duty<20% ?3 when glass-epoxy board (70701.6mm) mounted. in case operating environment is over 25c, 2mw would be reduced per each 1c stepping up. z recommended operating conditions (ta=25 c) parameter symbol min. typ. max. unit supply voltage led supply voltage v cc 3.0 v 2.6 3.6 ledv cc 2.8 v 2.6 5.5
rpm871-h12 photo link module 2/7 z block diagram and application circuit amp 1 8765432 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-h12 photo link module 3/7 z terminal description terminal circuit function pin no 1, 4 gnd gnd pin1 and pin4 must be connected to the ground. this terminal must be left open. 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 45s. led anode terminal other power source can be used difference between ledv cc and v cc . led current depends on led load resistance value. 2nc pwdown rxd txd leda 3 5 6 7 8 shield case connect to ground. ? 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-h12 photo link module 4/7 z electrical characteristics (unless otherwise noted, v cc =2.8v, vledv cc =2.8v, ta=25 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= ?50a irxl=200a c l =15pf c l =15pf c l =15pf, 2.4 to 115.2kbps z optical characteristics (unless otherwise noted, v cc =2.8v, vledv cc =2.8v, ta=25 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 [?] ?15deg l +15deg txd=v cc 10% to 90% intensity1 half-angle rise time / fall time optical over shoot edge jitter irradiance in angular input half-angle 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 ? 120
rpm871-h12 photo link module 5/7 z timing chart less than 45s (emitting) more than 45s approximately 45s less than 2.3s more than 2.3s approximately 2.3s approximately 2.3s 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 attached components recommended values part symbol c1 recommended value notice 1f, tantalum or ceramic ex.) tcfga1a105m8r (rohm) bigger capacitance is recommended with much noise from power supp ly 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-h12) in case of using r1 with different condition from the above, formula is as follows : led resistance value : r1[ ? ], led average consumption current : iled[ma], supply voltage : vledv cc [v], necessary d[cm] (including led?s distribution within 15deg) r1=t (vledv cc ? 4.45) / d 2 ? 3.5 [ ? ] iled=duty (vledv cc ? 1.36) / (r1 + 2.5) [a] duty : led duty at emitting t : 17300 (vs. rpm871-h12), 29400 (vs. ver1.0) ? please set up to be iled / duty < 200[ma] (duty < 20%)
rpm871-h12 photo link module 6/7 z notes 1) ledv cc (8pin) and v cc (3pin) ? other power source can be used difference between ledv cc and v cc . 2) caution in designing board lay-out to get maximum potential from rpm871-h12, please keep in mind following instruction. ? the line of rxd (6pin) should be connect ed at backside via through hole close to rpm871-h12 pin lead. better not to be close to photo diode side (1pin). ? this is to minimize feedback supplied to photo diode from rxd. ? as for c1 between 3-4 pin should be placed close to rpm871-h12. ? better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also away from the parts which generates noise, such as dc / dc converter. 3) others ? please be sure to set up the txd (7pin) input to be ?l? (under 0.55v) except transmitting data (for < 90 s, on duty < 20%). ? power down current might increase if exposed by strong light (ex. direct sun light) at powerdown mode. ? please use by the signal format which is specified by irda ver1.2 (2.4k to 1 15.2kbps). there might be on error if used by different signal format. 4) led current derating and ambient temperature the relation between led peak current and maxi mum ambient temperature is shown below. we recommend you to use within the range as indicated in below. a) when glass-epoxy board (70 70 1.6mm) mounted. ? 200 2040608010 0 ambient temperature : ta (c) 0 maximum led peak current : iledp (ma ) 50 100 150 200 250 duty=10% duty=20% b) rpm871-h12 ? 200 2040608010 0 ambient temperature : ta (c) 0 maximum led peak current : iledp (ma ) 50 100 150 200 250 duty=10% duty=20%
rpm871-h12 photo link module 7/7 z external dimensions (unit : mm) unit:mm note tolerance 0.2mm coplanarity:0.1mmmax pinpd led 8 1 eth450 0.6 2.4 3.0 8.0 3.0 2.8 5.6 0.56 0.370.1 0.60.1 0.680.1 0.60.1 7.6 p0.95 7=6.65 a 2.49 2.72 2.0 0.150.1 1.75 0.840.1 0.75 3.0 a part size (shield case underside size)
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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