RPM872-H7 photo link module irda infrared communication module RPM872-H7 RPM872-H7 is an infrared communication module for irda ver. 1.2 (low power). the infrared led, pin photo diode, and waveform shaping lsi are all integrated into one single package. this module is designed for low power consumption. the very small package makes it a perfect fit for mobile devices. ! ! ! ! features 1) applied to irda ver. 1.2. (low power) 2) designed for low power consumption at stand-by for receiving (75 a). 3) low operating voltage v cc =2.0v~3.6v vio=1.5v~3.6v vled=2.6v~5.5v 4) ultra small package. 5) power down function. ! ! ! ! applications cellular phones, pda, digital still camera, handy terminals, and other portable equipments. ! ! ! ! absolute maximum ratings (ta = 25 c) power dissipation supply voltage operating temperature storage temperature parameter symbol limits unit v cc 7.0 ? 20 + 85 ? 30 + 100 v mw 100 topr tstg pd ?c ?c ! ! ! ! recommended operating conditions (ta = 25 c) supply voltage parameter symbol min. typ. max. unit v cc 3.0 v 2.0 3.6 vleda vio 3.0 v 2.6 5.5 3.0 v 1.5 v cc
RPM872-H7 photo link module ! ! ! ! block diagram and application circuit amp 1 8765432 amp amp power down v cc vio v cc v cc (3pin) and vleda(8pin) can be used on either common power source or different one. gnd c1 gnd vio gnd pwdown rxd txd leda pwdown rxd txd (ledv cc )
RPM872-H7 photo link module ! ! ! ! terminal description function pin no 1, 4 gnd gnd pin1 and pin4 must be connected to the ground. vio supply voltage for i/o pins (pwdown, rxd, txd) 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 mode l : operating mode connect to ground. 2 vio pwdown rxd txd leda shield case 3 5 6 7 8 ? v cc vio vio 600k led vio vio pwdown 300k v cc supply voltage for transceiver circuits. for preventing from infection, connect a capacitor between v cc (3pin) and gnd(4pin). receiving data output terminal cmos logic level output when pwdown (5pin) = h, the rxd output will be pulled up to vio at approximately 300k ? . transmitting data input terminal h : led (on pwdown = l) cmos logic level input holding txd = "h"status, led will be turn off approximately 48 s. led anode terminal other power source can be used difference between ledv cc and v cc . this can be connected to battery kinds of unregulated voltage source by internal constant current driver. terminal circuit
RPM872-H7 photo link module ! ! ! ! electrical characteristics (unless otherwise noted, v cc =3v, vleda=3v, vio=3v, ta=25 c) pwdown input high voltage pwdown input high current pwdown input low voltage pwdown input low current consumption current 1 parameter symbol min. typ. max. unit conditions i cc 1 i cc 2 vpdh vpdl ipdh ipdl 75 a vpwdown = 0v. at no input light vpwdown = vio. at no input light pwdown = vio [v] vio = 1.8 3.6 [v] vio = 1.5 1.8 [v] vio = 1.8 3.6 [v] vio = 1.5 1.8 [v] ? 0.01 ? 0 ? 2.4 ? ? 2/3 ? vio 1.2 2/3 ? vio 1.2 1/3 ? vio vio ? 1.2 1/3 ? vio vio ? 1.2 99 a 0.2 kbps 115.2 v v vio vtxh vtxl itxh itxl ileda vrxh vrxl trr tfr trt twrxd pwdown = 0 [v] txd = vio [v] txd = 0 [v] 0 ? 1.0 0 2.5 ? 1.0 ? 0 ? ? 1.5 ? vio ? 0.4 0 ? 1.0 ? ? 5 0 30.5 ? ? 35 35 2.3 100 a 1.0 a 1.0 v v a a ma v v ns ns s s vio 10 1.0 ? vio 0.4 ? ? 4.2 200 irxh = ? 200 a irxl = 200 a c l = 15pf c l = 15pf c l = 15pf, 2.4 115.2kbps vio = 1.8 3.6 [v] vio = 1.5 1.8 [v] vio = 1.8 3.6 [v] vio = 1.5 1.8 [v] consumption current 2 transmission rate txd input high voltage txd input high current txd input low voltage txd input low current led anode current rxd output high voltage rxd output low voltage rxd output rise time rxd output fall time rxd output pulse width receiver latency time ! ! ! ! optical characteristics (unless otherwise noted, v cc =3v, vleda=3v, vio=3v, ta=25 c) 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. parameter symbol min. typ. max. unit conditions p ie1 l / 2 d / 2 tledmax tr / tf tj ee 870 nm ? 15 ? l 15 ? ? 15 ? l 15 ? txd=vio 10% 90% 850 10 4.0 ? 18 ? ? 900 mw / sr 26 twled txd=1.63 s pulse input 1.63 1.42 s 2.02 mw / cm 2 deg ns deg s 30 100 ? ? ? ? ? 48 ? 40 0.0068 15 16 % 25 ns 40 500 ? 120 peak wave length intensity 1 half-angle rise time / fall time optical over shoot optical pulse width edge jitter irradiance in angular input half-angular maximum emitting time
RPM872-H7 photo link module ! ! ! ! timing chart more than 48 s approximately 48 s less than 2.3 s more than 2.3 s approximately 2.3 s approximately 2.3 s pull up to vio at approximately 300k ? (emitting side) (detecting side) txd (7pin) internal led (light output) light input rxd (6pin) pwdown (5pin) less than 48 s (emitting) (emitting) (emitting) ! ! ! ! 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
RPM872-H7 photo link module ! ! ! ! notes 1) vleda(8pin), v cc (3pin) and vio(2pin) ? other power source can be used difference between vleda and v cc and vio. (vio < v cc +0.3v) 2) caution in designing board lay-out to get maximum potential from RPM872-H7, please keep in mind following instruction. ? the line of rxd (6pin) should be connected at backside via through hole close to RPM872-H7 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 RPM872-H7. ? 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 0.3v) except transmitting data (for < 90 s. on duty < 20%). ? powerdown current might increase if exposed by strong light (ex. direct sunlight) at powerdown mode. ? please use by the signal format which is specified by irda ver1.2 (low power). there might be on error if used by different signal format. ? dust or dirt on lens portion may affect the characteristics, so pay sufficient attention. 4) eye safe ? iec825-1 (en60825-1) class 1 eye safe. ! ! ! ! external dimensions (units : 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)
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