RPM872 Photo Link Module IrDA infrared communication module RPM872 RPM872 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. zFeatures 1) Applied to IrDA Ver. 1.2. (Low Power) 2) Designed for low power consumption at waiting mode (75µA). 3) Low operating voltage VCC=2.0V to 3.6V VIO=1.5V to 3.6V VLED=2.6V to 5.5V 4) Small package. 5) Power down function. zApplications Cellular phones, PDA, Digital still camera, Handy terminals, and other portable equipments. zAbsolute maximum ratings (Ta=25°C) Parameter Supply voltage Symbol Limits Unit VCC 7.0 V Pd 100 mW Operating temperature Topr −20 to +85 ˚C Storage temperature Tstg −30 to +100 ˚C Power dissipation zRecommended operating conditions (Ta = 25°C) Parameter Supply voltage Symbol Min. Typ. Max. Unit VCC 2.0 3.0 3.6 V VLEDA 2.6 3.0 5.5 V VIO 1.5 3.0 VCC V Rev.B 1/6 RPM872 Photo Link Module zBlock diagram and application circuit AMP 2 1 AMP GND VIO VIO VCC AMP 3 VCC GND 4 GND C1 PWDOWN 7 6 5 PWDOWN RXD RXD TXD TXD LEDA (LEDVCC) 8 POWER DOWN VCC(3pin) and VLEDA(8pin) can be used on either common power source or different one. Rev.B 2/6 RPM872 Photo Link Module zTerminal description Function Pin No Terminal 1, 4 GND 2 VIO VIO Supply voltage for I/O pins (PWDOWN, RXD, TXD) VCC VCC Supply voltage for Transceiver circuits. For preventing from infection, connect a capacitor between VCC(3pin) and GND(4pin). 3 Circuit GND Power-down Control Terminal H : POWERDOWN MODE L : OPERATING MODE CMOS logic level input When input is H, it will stop the receiving VIO 5 PWDOWN circuit, Pin-PD current and transmitting LED operation. VIO VIO PWDOWN 6 300k RXD Receiving Data Output Terminal CMOS logic level output When PWDOWN (5pin) = H, the RXD output will be pulled up to VIO at approximately 300kΩ. VIO Transmitting Data Input Terminal 7 TXD 600k H : LED (PWDOWN = L) CMOS logic level input Holding TXD = "H"status, LED will be turn off approximately 48µs. LED ANODE Terminal 8 LEDA LED Other power source can be used difference between LEDVCC and VCC. This can be connected to battery kinds of unregulated voltage source by internal constant current driver. Rev.B 3/6 RPM872 Photo Link Module zElectrical characteristics (Unless otherwise noted, VCC=3V, VLEDA=3V, VIO=3V, Ta=25°C) Symbol Min. Typ. Max. Unit Consumption Current 1 ICC1 − 75 99 µA VPWDOWN = 0V. At no input light Consumption Current 2 ICC2 − 0.01 0.2 µA VPWDOWN = VIO. At no input light 2.4 − 115.2 kbps − VIO V Parameter Transmission rate PWDOWN INPUT High Voltage VPDH 2/3∗VIO 1.2 1/3∗VIO Conditions VIO = 1.8 to 3.6 [V] VIO = 1.5 to 1.8 [V] VIO = 1.8 to 3.6 [V] PWDOWN INPUT Low Voltage VPDL 0 − PWDOWN INPUT High Current IPDH −1.0 0 1.0 µA PWDOWN = VIO [V] PWDOWN INPUT Low Current IPDL −1.0 0 1.0 µA PWDOWN = 0 [V] − VIO V VIO−1.2 V VIO = 1.5 to 1.8 [V] <Transmitter> TXD INPUT High Voltage VTXH 2/3∗VIO 1.2 1/3∗VIO VIO = 1.8 to 3.6 [V] VIO = 1.5 to 1.8 [V] VIO = 1.8 to 3.6 [V] 0 − ITXH 2.5 5 10 µA TXD = VIO [V] ITXL −1.0 0 1.0 µA TXD = 0 [V] ILEDA − 30.5 − mA RXD OUTPUT High Voltage VRXH VIO−0.4 − VIO V IRXH = −200µA RXD OUTPUT Low Voltage VRXL 0 − 0.4 V IRXL = 200µA RXD OUTPUT Rise Time tRR − 35 − ns CL = 15pF RXD OUTPUT Fall Time tFR − 35 − ns CL = 15pF twRXD 1.5 2.3 4.2 µs CL = 15pF, 2.4 to 115.2kbps tRT − 100 200 µs TXD INPUT Low Voltage VTXL TXD INPUT High Current TXD INPUT Low Current LED ANODE Current VIO−1.2 V VIO = 1.5 to 1.8 [V] <Receiver> RXD OUTPUT Pulse Width Receiver Latency Time zOptical characteristics (Unless otherwise noted, VCC=3V, VLEDA=3V, VIO=3V, Ta=25°C) Symbol Min. Typ. Max. Unit λP 850 870 900 nm Intensity 1 IE1 4.0 10 26 Half-Angle θL / 2 − ±18 ±30 deg Optical pulse width TWLED 1.42 1.63 2.02 µs TXD=1.63µs pulse input Rise time / Fall time Tr / Tf − − 100 ns 10% to 90% − − 25 % Tj −40 − 40 ns Minimum irradiance Eemin − − 6.8 µW / cm2 −15deg ≤ θL ≤ +15deg Maximum irradiance Eemax 500 − − mW / cm2 −15deg ≤ θL ≤ +15deg θD / 2 ±15 − − deg TLEDmax 16 48 120 µs Parameter Peak wave length Optical over shoot Edge jitter INPUT Half-Angular Maximum Emitting Time Conditions mW / Sr −15˚ ≤ θL ≤ 15˚ TXD=VIO 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. Rev.B 4/6 RPM872 Photo Link Module zTiming chart (Emitting side) TXD (7pin) less than 48 µs (emitting) more than 48 µs (emitting) (emitting) Internal LED (Light output) approximately 48 µs (Detecting side) Light input less than 2.3 µs more than 2.3 µs RXD (6pin) pull up to VIO at approximately 300kΩ approximately 2.3 µs approximately 2.3 µs PWDOWN (5pin) zRecommended values Part symbol C1 Recommended value 1µF, tantalum or ceramic Ex.) TCFGA1A105M8R (ROHM) Notice Bigger capacitance is recommended with much noise from power supply Rev.B 5/6 RPM872 Photo Link Module zNotes 1) VLEDA(8pin), VCC(3pin) and VIO(2pin) • Other power source can be used difference between VLEDA and VCC and VIO. (VIO < VCC +0.3V) 2) Caution in designing board lay-out To get maximum potential from RPM872, please keep in mind following instruction. • The line of RXD (6pin) should be connected at backside via through hole close to RPM872 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. • 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 < 90µs. 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. zExternal dimensions (Unit : mm) 1 7.6 5.6 R1.1 R1.0 1 2 3.8 Pin PD LED 1 0.37±0.10 0.95 P0.95 × 7=6.65 0.76 2.49 0.8 2.72 0.78 8 RSLP8 Rev.B 6/6 Appendix 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. 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. 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. Appendix1-Rev1.1