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| RPM873 Photo Link Module IrDA Infrared Communication Module RPM873 RPM873 is an infrared communication module for IrDA Ver. 1.2 (Low Power). The infrared LED, PIN photo diode, and 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) Infrared LED, PIN photo diode, LED driver and built-in receiver frequency formation circuit. 2) Applied to SIR (2.4 to 115.2kbps) low power standard. 3) Supply voltage range is from VCC=2.0 to 3.6V, VLEDA=2.6 to 5.5V. 4) Surface mounting type. 5) Built-in power down function. Applications Cellular phones, PDA, DVC, digital still cameras, printers, handy terminals and etc. Absolute maximum ratings (Ta=25C) Parameter Supply voltage Input voltage Operation temperature Storage temperature Power dissipation Symbol VCC/VLEDA Vin(5,6,7pin) Topr Tstg Pd Limits 7.0 1 -0.3 to VCC+0.3 -25 to 85 -30 to 100 100 2 Unit V V C C mW 1) This applies to all pins on the basis of ground pins (1,4pin). 2) In case of operating environment is over 25C, 1.33mW would be reduced per each 1C stepping up. Recommended operating conditions (Ta=25C) Parameter Supply voltage Symbol VCC VLEDA Min. 2.0 2.6 Typ. 3.0 3.0 Max. 3.6 5.5 Units V V Rev.B 1/6 RPM873 Photo Link Module Block diagram and application circuit AMP GND 1 2 NC VCC VCC AMP AMP 3 GND GND C1 4 POWER DOWN PWDOWN PWDOWN 5 RXD RXD 6 7 TXD TXD LEDA (LEDVCC) 8 VCC(3pin) and VLEDA(8pin) can be used on either common power source or different one. Recommended values Part symbol C1 Recommended 1F, tantalum or ceramic Ex.) TCFGA1A105M8R(ROHM) Notice Bigger capacitance is recommended with much noise from power supply. Rev.B 2/6 RPM873 Photo Link Module Terminal description Pin No. 1 2 Terminal GND NC Circuiit GND Funciton This terminal must be left open. VCC 3 VCC For preventing from infection, connect a capacitor between VCC(3pin) and GND(4pin). 4 GND GND VCC 5 PWDOWN Power-down control terminal H : Power down L : Operation CMOS logic level input When input is H, it will stop the receiving circuit, PIN-PD current and transmitting LED operation. VCC PWDOWN VCC 300K 6 Receiving data output teminal CMOS logic level output When PWDOWN (5pin) = H, the RXD output will be pulled up to VCC at approximately 300k. RXD VCC 7 TXD 600k Transmitting data input terminal H : LED (PWDOWN = L) CMOS logic level input Holding TXD = H status, LED will be turned off at approximately 48s. LED ANODE terminal Other power source can be used 8 LEDA LED difference between VLEDA and VCC. This can be connected to battery kinds of unregulated voltage source by internal constant current driver. Rev.B 3/6 RPM873 Photo Link Module Electrical characteristics (VCC=3V, VLEDA=3V, Ta=25C) Parameter Consumption current 1 Consumption current 2 Transmission rate PWDOWN input high voltage PWDOWN input low voltage PWDOWN input high current PWDOWN input low current Optical characteristics (VCC=3V, VLEDA=3V, Ta=25C) Parameter Peak wave length Intensity 1 Half-angle Opticcal pulse width Rise time / Fall time Optical over shoot Edge jitter Minimum irradiance in angular range Tj Eemin Symbol P IE1 L / 2 TWLED Tr / Tf Min. 850 4 - 1.42 - Typ. 870 10 18 1.63 - Max. 900 26 30 2.02 100 Unit nm mW / Sr Conditions -15 < L < 15 -- TXD=1.63s pulse input 10% to 90% C s ns - -40 - 500 15 10 - - - - - 48 25 40 6.8 - - 120 % ns W / cm2 -15 < L < 15 -- Maximum irradiance in angular range Half-angle Maximum emitting time Eemax D / 2 TLEDmax mW / cm2 -15 < L < 15 -- C s TXD=VCC 1. This product is not designed for protection against radioactive rays. 2. This product does not include laser transmitter. 3. This product include one PIN photo diode. 4. This product dose not include optical load. Rev.B 4/6 RPM873 Photo Link Module Timing chart (Emitting side) TXD (7pin) less than 48 s more than 48 s (emitting) (emitting) (emitting) Internal LED (Light output) approximately 48 s (Detecting side) Light input less than 2.3 s more than 2.3 s RXD (6pin) approximately 2.3 s pull up to VCC at approximately 300 k PWDOWN (5pin) Notes 1) VLEDA (8pin) and VCC (3pin) *Other power source can be used difference between VLEDA and VCC. 2) Caution in designing board lay-out To get maximum potential from RPM873, please keep in mind following instruction. *The line of RXD (6pin) should be connected at backside via through hole close to RPM873 pin lead. Better not to be close to photo diode side (1pin). This is to minimize feedback supplied to photo diode from RXD. *Better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also away from the parts which generate noise, such as DC / DC converter. *As for C1 between 3-4pin should be placed close to RPM873. 3) Notes *Please be sure to set up the TXD (7pin) input to be "L" (under 0.55V) except transmitting data (for<90s, ON duty<20%) *Power down current might increase if exposed by strong light (ex. direct sunlight) at power down mode. *Please use by the signal format which is specified by lrDA Ver1.2 (2.4k to 115.2kbps). There might be on error if used by different signal format. 4) Eye Safe *IEC825-1 (EN60825-1) Class 1 Eye Safe. Rev.B 5/6 RPM873 Photo Link Module Dimensions Diagram (Unit : mm) 1 7.6 5.6 3.8 R1.1 R1.0 2 Pin PD LED 1 0.78 0.76 2.72 1 0.370.10 0.95 P0.95 x 7=6.65 8 RSLP8 0.8 2.49 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 |
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