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 (75µA 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 = 25°C) Symbol Limits Unit Supply voltage Parameter VCC 7.0 V Input voltage Vin −0.3~VCC+0.3 V °C Operating temperature Topr −20~+85 Storage temperature Tstg −30~+100 LED peak current Ifp 120 Power dissipation Pd 100 °C ∗1 mA mW ∗1 LED peak current : <90µsec, on duty < 20% !Recommended operating conditions (Ta = 25°C) Parameter Supply voltage Symbol Min. Typ. Max. Unit VCC 2.6 3.0 3.6 V VLEDA 2.6 3.0 5.5 V RPM870-H7 Photo Link Module !Block diagram and application circuit AMP 2 1 AMP GND NC VCC 3 VCC AMP C1 GND 4 GND PWDOWN PWDOWN 5 POWER DOWN RXD 6 RXD TXD 7 TXD LEDA 8 (LEDVCC) Recommended values Part symbol C1 Recommended value 1µF, tantalum Ex.) TCFGA1A105M8R (ROHM) Notice Bigger capacitance is recommended with much noise from power supply RPM870-H7 Photo Link Module !Terminal description Circuit Function Pin No Terminal 1, 4 GND 2 NC This terminal must be left open. VCC VCC For preventing from ripple noise. connect a capacitor between VCC (3pin) and GND (4pin). 3 GND VCC 5 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. PWDOWN VCC Receiving data output terminal 6 CMOS logic level input When PWDOWN (5pin) = H, the RXD output will be pulled up to VCC at approximately 300kΩ. RXD 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 48µsec. 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 = 25°C) Symbol Min. Typ. Max. Unit Consumption Current 1 Parameter ICC1 − 75 99 µA Stand-by for receiving, no input light. Consumption Current 2 ICC2 PWDOWN = VCC [V] , no input light. Transmission rate − 0.01 0.2 µA 2.4 − 115.2 kbps V Conditions PWDOWN INPUT High Voltage VPDH VCC−0.5 − − PWDOWN INPUT Low Voltage VPDL − − 0.5 V PWDOWN INPUT High Current IPDH −1.0 0 1.0 µA PWDOWN = VCC [V] PWDOWN INPUT Low Current IPDL −1.0 0 1.0 µA PWDOWN = 0 [V] TXD INPUT High Voltage VTXH VCC−0.5 − − V TXD INPUT Low Voltage VTXL − − 0.5 V TXD INPUT High Current ITXH 7.5 15 30 µA TXD = VCC [V] TXD = 0 [V] <Transmitter> ITXL −1.0 0 1.0 µA LED ANODE Current ILEDA − 30.5 − mA <Receiver> RXD OUTPUT High Voltage VRXH VCC−0.5 − − V IRXH = −50µA RXD OUTPUT Low Voltage VRXL − − 0.5 V IRXL = 200µA RXD OUTPUT Rise Time tRR − 40 − nsec CL = 15pF RXD OUTPUT Fall Time tFR − 20 − nsec CL = 15pF twRXD 1.5 2.3 3.6 µsec CL = 15pF, 2.4~115.2Kbps tRT − 100 300 µsec TXD INPUT Low Current RXD OUTPUT Pulse Width Receiver Latency Time !Optical characteristics (Unless otherwise noted, VCC=3V, VLEDVCC=3V, Ta = 25°C) Parameter Symbol Min. Typ. Max. Unit Peak wave length λP 850 870 900 nm Intensity 1 IE1 4.0 10 26 mW / Sr −15˚ ≤ θL ≤ 15˚ θL ≤ −30˚, 30˚ ≤ θL Intensity 2 IE2 − − 3.6 mW / Sr Half-Angle θL / 2 − ±18 − deg Rise time / Fall time Tr / Tf − − 100 nsec − − 25 % Edge jitter Tj −40 − 40 nsec Irradiance in angular Ee 0.0068 − 500 θD / 2 ±15 − − deg TLEDmax 16 48 90 µsec Optical over shoot 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. Conditions 10%~90% mW / cm2 −15˚ ≤ θL ≤ 15˚ TXD=VCC RPM870-H7 Photo Link Module !Timing chart (Emitting side) TXD (7pin) less than 48 µsec (emitting) more than 48 µsec (emitting) (emitting) Internal LED (Light output) approximately 48 µsec (Detecting side) Light input less than 2.3 µsec more than 2.3 µsec RXD (6pin) pull up to VCC at approximately 300kΩ approximately 2.3 µsec 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 < 90µsec. 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) φ2 .2 Pin PD 1.1 1.4 2.8 0.15 0.8 0.7 LED 2.55 4.0 8.0 2.9 2.85 R 1 1. 1. 1 R 1 2.2±0.2 1.0 0.15 1.75 φ2 .2 2.9 2.2 P0.95 × 7 = 6.65 0.35 8 RSLP8 (H7)