RPM873-E2A

RPM873 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. zFeatures 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. zApplications Cellular phones, PDA, DVC, digital still cameras, printers, handy terminals and etc. zAbsolute maximum ratings (Ta=25°C) Parameter Symbol Supply voltage VCC/VLEDA Input voltage Limits Unit 7.0 ∗1 V Vin(5,6,7pin) −0.3 to VCC+0.3 V Operation temperature Topr −25 to 85 °C Storage temperature Tstg −30 to 100 Power dissipation °C 100 ∗2 Pd mW ∗1) This applies to all pins on the basis of ground pins (1,4pin). ∗2) In case of operating environment is over 25°C, 1.33mW would be reduced per each 1°C stepping up. zRecommended operating conditions (Ta=25°C) Parameter Supply voltage Symbol Min. Typ. Max. Units VCC 2.0 3.0 3.6 V VLEDA 2.6 3.0 5.5 V Rev.B 1/6 RPM873 Photo Link Module zBlock diagram and application circuit AMP 2 1 AMP GND NC VCC AMP 3 VCC GND 4 GND C1 PWDOWN PWDOWN 5 7 6 POWER DOWN RXD RXD TXD TXD LEDA 8 (LEDVCC) VCC(3pin) and VLEDA(8pin) can be used on either common power source or different one. zRecommended values Part symbol C1 Recommended 1µF, 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 zTerminal description Pin No. Terminal Circuiit Funciton 1 GND GND 2 NC This terminal must be left open. 3 VCC VCC For preventing from infection, connect a capacitor between VCC(3pin) and GND(4pin). 4 GND GND 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 5 PWDOWN VCC VCC PWDOWN 6 300K RXD Receiving data output teminal CMOS logic level output When PWDOWN (5pin) = H, the RXD output will be pulled up to VCC at approximately 300kΩ. VCC 7 Transmitting data input terminal H : LED (PWDOWN = L) CMOS logic level input TXD 600k Holding TXD = H status, LED will be turned off at approximately 48µs. 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 zElectrical characteristics (VCC=3V, VLEDA=3V, Ta=25°C) Parameter Symbol Min. Consumption current 1 ICC1 − 75 99 µA Waiting mode, At no input light Consumption current 2 ICC2 − 0.01 0.2 µA PWDOWN mode, At no input light 2.4 − 115.2 kbps Transmission rate Typ. Max. Unit Conditions PWDOWN input high voltage VPDH VCC−0.55 − − V PWDOWN input low voltage VPDL 0 − 0.55 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−0.55 − − V TXD input low voltage VTXL 0 − 0.55 V TXD input high current ITXH 2.5 5 10 µA TXD=VCC [V] TXD=0 [V] ITXL −1.0 0 1.0 µA ILEDA − 30.5 − mA RXD output high voltage VRXH VCC−0.4 − − 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 current LED anode current RXD output pulse width Receiver latency time zOptical characteristics (VCC=3V, VLEDA=3V, Ta=25°C) Parameter Symbol Min. Typ. Max. Unit λP 850 870 900 nm Intensity 1 IE1 4 10 26 mW / Sr Half-angle θL / 2 − ±18 ±30 ˚C Opticcal 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 % Peak wave length Optical over shoot Conditions −15° < − θL < − 15° Tj −40 − 40 Minimum irradiance in angular range Eemin − − 6.8 µW / cm2 −15° < − θL < − 15° Maximum irradiance in angular range Eemax 500 − − θD / 2 ±15 − − mW / cm2 −15° < − θL < − 15° ˚C TLEDmax 10 48 120 Edge jitter Half-angle Maximum emitting time ns µs 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 zTiming chart (Emitting side) TXD (7pin) less than 48 µs more than 48 µs (emitting) (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) approximately 2.3 µs pull up to VCC at approximately 300 kΩ PWDOWN (5pin) zNotes 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