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| RPM870-H7 Photo Link Module IrDA wireless communication transceiver IC (supports Ver. 1.2 Low Power) RPM870-H7 The RPM870-H7 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 a receiver frequency formation 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. !Features 1) Supports IrDA Ver. 1.2. (Low Power) 2) Low power consumption while standing by for receiving (75A 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. !Applications Mobile phones, PDAs, and others !Absolute maximum ratings (Ta = 25C) Parameter Supply voltage Input voltage Operating temperature Storage temperature LED peak current Power dissipation 1 LED peak current : <90sec, on duty < 20% Symbol VCC Vin Topr Tstg Ifp Pd Limits 7.0 -0.3~VCC+0.3 -20~+85 -30~+100 120 100 1 Unit V V C C mA mW !Recommended operating conditions (Ta = 25C) Parameter Supply voltage Symbol VCC VLEDA Min. 2.6 2.6 Typ. 3.0 3.0 Max. 3.6 5.5 Unit V V RPM870-H7 Photo Link Module !Block diagram and application circuit AMP GND 1 2 NC VCC VCC C1 GND GND AMP AMP 4 POWER DOWN PWDOWN 3 PWDOWN 5 RXD RXD 6 TXD TXD 7 LEDA (LEDVCC) Recommended values Part symbol C1 Recommended value 1F, tantalum Ex.) TCFGA1A105M8R (ROHM) Notice Bigger capacitance is recommended with much noise from power supply 8 RPM870-H7 Photo Link Module !Terminal description Pin No 1, 4 2 Terminal GND NC Circuit GND This terminal must be left open. VCC For preventing from ripple noise. connect a capacitor between VCC (3pin) and GND (4pin). VCC Power-down control terminal H : POWERDOWN L : OPERATION CMOS logic level input When input is L, it will stop the receiving circuit, Pin-PD current and transmitting LED operation. VCC Receiving data output terminal 6 RXD CMOS logic level input When PWDOWN (5pin) = H, the RXD output will be pulled up to VCC at approximately 300k. VCC Transmitting data input terminal 7 TXD 200K H : LED Drive (PWDOWN = L) CMOS logic level output Holding TXD = "H"status, LED will be turn off approximately 48sec. Function 3 VCC 5 PWDOWN LED ANODE terminal 8 LEDA LED Other power source can be used difference between LEDVCC and VCC. RPM870-H7 Photo Link Module !Electrical characteristics (Unless otherwise noted, VCC=3V, VLEDVCC=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 VRXH VRXL tRR tFR twRXD tRT VCC-0.5 - - - 1.5 - V V nsec nsec sec sec !Optical characteristics (Unless otherwise noted, VCC=3V, VLEDVCC=3V, Ta = 25C) Parameter Peak wave length Intensity 1 Intensity 2 Half-Angle Rise time / Fall time Optical over shoot Edge jitter Irradiance in angular INPUT Half-Angular Maximum Emitting Time Tj Ee D / 2 TLEDmax Symbol P IE1 IE2 L / 2 Tr / Tf Min. 850 4.0 - - - - -40 0.0068 15 16 Typ. 870 10 - 18 - - - - - 48 Max. 900 26 3.6 - 100 25 40 500 - 90 Unit nm mW / Sr mW / Sr deg nsec % nsec mW / cm2 -15 L 15 deg sec TXD=VCC 10%~90% -15 L 15 L -30, 30 L Conditions 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-H7 Photo Link Module !Timing chart (Emitting side) TXD (7pin) less than 48 sec (emitting) more than 48 sec (emitting) (emitting) Internal LED (Light output) approximately 48 sec (Detecting side) Light input less than 2.3 sec more than 2.3 sec RXD (6pin) pull up to VCC at approximately 300k approximately 2.3 sec PWDOWN (5pin) !Notes 1) LEDVCC (8pin) and VCC (3pin) Other power source can be used difference between LEDVCC and VCC. 2) Caution in designing board lay-out To get maximum potential from RPM870-H7, please keep in mind following instruction. The line of RXD (6pin) should be connected at backside via through hole close to RPM870-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 RPM870-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 0.5V) except transmitting data (for < 90sec. 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. 4) Eye Safe IEC825-1 (EN60825-1) Class 1 Eye Safe. * * * * * * * * RPM870-H7 Photo Link Module !External dimensions (Units : mm) 2 2.9 2.2 .2 1.0 Pin PD 0.15 2.20.2 1.75 1.1 1.4 2.8 4.0 8.0 2 .2 LED 0.15 0.8 0.7 2.55 2.85 R P0.95 x 7 = 6.65 0.35 8 1. 1 1 RSLP8 (H7) 2.9 R 1. 1 |
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