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| RPM871-H7 Photo Link Module IrDA Infrared communication Module RPM871-H7 RPM871-H7 is an infrared communication module for IrDA Ver. 1.2 (Low Power). The infrared LED, PIN photo diode, waveform shaping LSI are all integrated into a single package. This module is designed with power down function and low current consumption at stand-by mode. The ultra small package makes it a perfect fit for mobile devices. !Features 1) Applied to IrDA version 1.2. (Low Power) 2) Designed for low power consumption at stand-by for receiving (Typ.73A). 3) Suitable for sets driven by battery due to power down control function. 4) Power supply voltage range : 2.6V3.6V 5) Constant LED load resistance can change communication range. (Approx. 2060cm) !Applications Cellular phones, PDAs, etc. !Absolute maximum ratings (Ta = 25C) Parameter Power supply voltage Power dissipation Operating temperature range Storage temperature range LED peak current Symbol VCC Pd Topr Tstg IFP Limits -0.3~+7.0 1501 -20~+85 -30~+100 2002 Unit V mW C C mA 1 70mmx70mm, t=1.6mm, glass epoxy mounting. Derating : 2mW/C for operation above Ta=25C 2 LED peak current<90s. ON duty<20% !Recommended operating conditions (Ta = 25C) Parameter Power supply voltage Symbol VCC VLEDA Min. 2.6 2.6 Typ. 2.8 2.8 Max. 3.6 5.5 Unit V V RPM871-H7 Photo Link Module !Block diagram and application circuit AMP GND 1 2 NC AMP VCC VCC 3 AMP GND 4 GND C1 POWER DOWN PWDOWN PWDOWN 5 6 RXD RXD 7 TXD TXD R1 (LEDVCC) LEDA 8 LED DRIVER VCC (3pin) and VLEDA (8pin) can be used on either common power source or different one. RPM871-H7 Photo Link Module !Terminal description Pin No 1, 4 2 Terminal GND NC Circuit Function GND Pin1 and pin4 must be connected to the ground. This Terminal must be left open. VCC For preventing from infection, connect a capacitor between VCC (3pin) and GND (4pin). VCC 3 VCC 5 PWDOWN 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. VCC PWDOWN 6 RXD 300k VCC Receiving Data Output Terminal CMOS Logic Level Output When PWDOWN (5pin)=H, the RXD output will be pulled up to VCC at approximately 300k. VCC 7 TXD 200K Transmitting Data Input Terminal H : LED (PWDOWN=L) CMOS Logic Level Input Holding TXD="H" status, LED will be turn off approximately 45s. 8 LEDA LED LED ANODE Terminal Other power source can be used difference between LEDVCC and VCC. LED current depends on LED load resistance value. - Shield Case Connect to Ground. RPM871-H7 Photo Link Module !Electrical characteristics (Unless otherwise noted, VCC=2.8V, VLEDVCC=2.8V, Ta = 25C) Parameter Consumption current1 Consumption current2 Transmission rate PWDOWN INPUT High voltage PWDOWN INPUT Low voltage PWDOWN INPUT High current PWDOWN INPUT Low current !Optical characteristics (Unless otherwise noted, VCC=2.8V, VLEDVCC=2.8V, Ta = 25C) Parameter Peak wave length Intensity1 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 L/2 Tr/Tf Min. 850 14.4 - - - -40 0.0068 15 10 Typ. 870 36 18 - - - - - 45 Max. 900 93.6 30 100 25 40 500 - 96 Unit nm mW/Sr deg ns % ns mW/cm2 -15L15 deg s TXD=VCC 10%90% -15L15 R1=7.5 [] 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. RPM871-H7 Photo Link Module !Timing chart (Emitting side) TXD (7pin) less than 45s more than 45s (emitting) (emitting) (emitting) Internal LED (Light output) approximately 45s (Detecting side) Light input less than 2.3s more than 2.3s RXD (6pin) pull up to VCC at approximately 300k approximately 2.3s approximately 2.3s PWDOWN (5pin) !Attached components Recommended values Part symbol C1 Recommended value 1F, tantalum or ceramic Ex.) TCFGA1A105M8R (ROHM) Notice Bigger capacitance is recommended with much noise from power supply More than 60cm distance, more than 4[W/cm2] at detecting side. (vs ver1.0) More than 46cm distance, more than 6.8[W/cm2] at detecting side. (vs RPM871-H7) R1 7.55%, 1/4W (VLEDVCC=2.8V) In case of using R1 with different condition from the above, formula is as follows : LED resistance value : R1[], LED average consumption current : ILED[mA], Supply voltage : VLEDVCC[V], Link distance : d[cm] (Including LED's distribution within 15deg) R1=T x (VLEDVCC-1.45) / d2-3.5 [] ILED=Duty x (VLEDVCC-1.36) / (R1+2.5) [A] Duty : LED duty at emitting T : 17300 (vs. RPM871-H7), 29400 (vs. ver1.0) Please set up to be ILED / Duty < 200[mA] (Duty < 20%) RPM871-H7 Photo Link Module !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 RPM871-H7, please keep in mind following instruction. The line of RXD (6pin) should be connected at backside via through hole close to RPM871-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 RPM871-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 0.55V) except transmitting data (for < 90sec. 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 IrDA Ver1.2 (2.4k115.2kbps). 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) LED current derating and ambient temperature The relation between LED peak current and maximum ambient temperature is shown below. We recommend you to use within the range as indicated in below. a) When glass-epoxy board (70x70x1.6mm) mounted. MAXIMUM LED PACK CURRENT : Iledp (mA) 250 Duty=10% 200 150 Duty=20% 100 50 0 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE : Ta (C) b) RPM871-H7 MAXIMUM LED PACK CURRENT : Iledp (mA) 250 Duty=10% 200 150 Duty=20% 100 50 0 -20 0 20 40 60 80 100 AMBIENT TEMPERATURE : Ta (C) RPM871-H7 Photo Link Module !External dimensions (Units : mm) 2.9 2.2 1.0 Pin PD 2 .2 0.15 1.1 1.4 2.8 4.0 8.0 LED 1.75 2.2 2 .2 0.15 0.8 0.7 2.55 2.85 1 P 0.95x7=6.65 0.35 8 RSLP8(H7) 2.9 R 1. 1 1 1. R |
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