rpm870-h14 photo link module 1/6 irda wireless communication transceiver ic (supports ver. 1.2 low power) rpm870-h14 the rpm870-h14 is an module that supports irda ver. 1.2 (low power), and is ideal for wireless communications. an infrared led, a pin-photo diode, and lsi are all contained in a very small single package. it is also equipped with low power consumption and power down functions making this ic perfect for mobile sets. z features 1) applied to irda ver. 1.2. (low power) 2) low power consumption while waiting mode. (90 a typ.). 3) a power-down function is perfect for battery applications. 4) supports a board power supply voltage range from 2.6v to 3.6v. 5) only 1 external capacitor required. z applications mobile phones, pdas, and others z absolute maximum ratings (ta = 25 c) parameter symbol limits unit supply voltage v cc 7.0 ?0.3 to v cc +0.3 ?20 to +85 ?30 to +100 v v mw input voltage vin 100 operating temperature storage temperature power dissipation topr tstg pd c c z recommended operating conditions (ta = 25 c) parameter symbol min. typ. max. unit supply voltage v cc 3.0 v 2.6 3.6 v leda 3.0 v 2.6 5.5
rpm870-h14 photo link module 2/6 z block diagram and application circuit amp 1 8 amp amp power down 2 3 4 5 6 7 v cc v cc gnd gnd nc gnd c1 pwdown rxd txd leda pwdown rxd txd (ledv cc ) recommended values part symbol c1 recommended value notice 1f, tantalum ex.) tcfga1a105m8r (rohm) bigger capacitance is recommended with much noise from power supply
rpm870-h14 photo link module 3/6 z terminal description terminal circuit function pin no 1, 4 gnd gnd this terminal must be left open. 2nc pwdown rxd txd leda 3 5 6 7 8 v cc v cc for preventing from ripple noise. connect a capacitor between v cc (3pin) and gnd (4pin). led v cc v cc 200k power-down control terminal h : powerdown l : operation cmos logic level input when input is h, it will stop the receiving circuit, pin-pd current and transmitting led operation. receiving data output terminal cmos logic level input when pwdown (5pin) = h, the rxd output will be pulled up to v cc at approximately 300k?. transmitting data input terminal h : led drive (pwdown = l) cmos logic level output holding txd = "h"status, led will be turn off approximately 48sec. led anode terminal other power source can be used difference between ledv cc and v cc . v cc v cc 300k pwdown
rpm870-h14 photo link module 4/6 z electrical characteristics (unless otherwise noted, v cc =3v, vledv cc =3v, ta=25 c) symbol min. typ. max. unit conditions i cc 1 i cc 2 vpdh vpdl ipdh ipdl 90 a pwdown = v cc [v] ? 0.01 ? ? ? 2.4 ? ? v cc ?0.5 120 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] 0 ?1.0 v cc ?0.55 ? 7.5 ?1.0 ? ? ? ? 1.5 v cc ?0.5 0 ?1.0 ? ? 15 0 50 ? ? 70 30 2.3 100 a 1.0 a 1.0 v v a a ma v v nsec nsec sec sec ? 0.55 30 1.0 ? ? 0.4 ? ? 3.6 200 irxh = ?50a irxl = 200a c l = 15pf c l = 15pf c l = 15pf, 2.4 to 115.2kbps parameter ? consumption current 1 consumption current 2 transmission rate pwdown input high voltage pwdown input high current pwdown input low voltage pwdown input low current 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 waiting mode, no input light. pwdown = v cc [v] , no input light. z optical characteristics (unless otherwise noted, v cc =3v, vledv cc =3v, ta=25 c) parameter symbol min. typ. max. unit conditions peak wave length p ie1 l / 2 d / 2 tledmax tr / tf tj ee 870 nm ?15? l 15? ?15? l 15? txd=v cc 10% to 90% intensity half-angle 850 10 4.0 ? ? ? 15 900 mw / sr 26 mw / cm 2 deg nsec deg sec ? 100 ?? ? ? ? 48 ?40 0.0068 15 16 % 25 nsec 40 500 ? 96 rise time / fall time optical over shoot edge jitter irradiance in angular input half-angular maximum emitting time 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.
rpm870-h14 photo link module 5/6 z timing chart more than 48 sec approximately 48 sec less than 2.3 sec more than 2.3 sec approximately 2.3 sec approximately 2.3 sec pull up to v cc at approximately 300k? (emitting side) (detecting side) txd (7pin) internal led (light output) light input rxd (6pin) pwdown (5pin) less than 48 sec (emitting) (emitting) (emitting) 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 rpm870-h14, please keep in mind following instruction. ? the line of rxd (6pin) should be connected at backside via through hole close to rpm870-h14 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 rpm870-h14. ? 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 0.5v) except transmitting data (for < 90 sec. on duty < 20%). ? powerdown current might increase if exposed by stro ng 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. ? please pay attention to the lens carefully. dusts of scratch on the lens may effect the characteristics of product. please handle it with care. 4) eye safe ? iec825-1 (en60825-1) class 1 eye safe.
rpm870-h14 photo link module 6/6 z dimensions (unit : mm) 18 note unit : mm a led pinpd 1.tolerance : 0.2mm 2.coplanarity : 0.1mmmax eth839 0.6 0.48 2.8 8.0 1.0 0.15 0.1 0.76 0.15 0.1 0.78 2.2 1.1 1.4 4.0 0.37 0.1 2.59 (0.13) p0.957=6.65 0.95 2.2 0.75 2.67 r1.0 r1.1 0.68 0.1 0.6 0.1 2.9 a part size (shield case underside size) 2.2
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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