ROHM RPM872 User Guide and Manual

Summary

This highly integrated Photo Link Module is an optimized infrared (IRDA Ver. 1.2) communication component designed for low power consumption in compact electronic applications. The manual provides comprehensive details on its operation—covering detailed electrical and optical characteristics, circuit diagrams, and usage guidelines. Ideal for manufacturers developing mobile devices such as PDAs, cellular phones, digital cameras, and other portable terminals requiring reliable, energy-efficient IR data transfer.

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RPM872

Photo Link Module

Ir DA infrared communication module RPM872 RPM872 is an infrared communication module for Ir DA Ver. 1.2 (Low Power). The infrared LED, PIN photo diode, and waveform shaping 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) Applied to Ir DA Ver. 1.2. (Low Power) 2) Designed for low power consumption at waiting mode (75µA). 3) Low operating voltage VCC=2.0V to 3.6V VIO=1.5V to 3.6V VLED=2.6V to 5.5V 4) Small package. 5) Power down function.

Applications Cellular phones, PDA, Digital still camera, Handy terminals, and other portable equipments.

Absolute maximum ratings (Ta=25°C) Parameter Symbol Limits Unit

Supply voltage VCC 7.0

Power dissipation Pd m W100

Operating temperature Topr −20 to +85 ˚C

Storage temperature Tstg −30 to +100 ˚C

Recommended operating conditions (Ta = 25°C) Parameter Symbol Min. Typ. Max. Unit

Supply voltage VCC 3.0 3.6 V2.0

VLEDA 3.0 5.5 V2.6

VIO 3.0 VCC V1.5

Rev.B 1/6

Page Summary Contents For ROHM RPM872 User Guide and Manual

Page 1 RPM872 Photo Link Module Ir DA infrared communication module RPM872 RPM872 is an infrared communication module for Ir DA Ver. 1.2 (Low Power). The infrared LED, PIN photo diode, and waveform shaping L...

Page 2 RPM872 Photo Link Module Block diagram and application circuit PWDOWN POWER PWDOWN (LEDVCC) VCC(3pin) and VLEDA(8pin) can be used on either common power source or different one. Rev.B 2/6

Page 3 RPM872 Photo Link Module Terminal description Terminal Circuit Function Pin No 1, 4 GND VIO VIO Supply voltage for I/O pins (PWDOWN, RXD, TXD) VCC Supply voltage for Transceiver circuits. VCC For prev...

Page 4 RPM872 Photo Link Module Electrical characteristics (Unless otherwise noted, VCC=3V, VLEDA=3V, VIO=3V, Ta=25°C) Parameter Symbol Min. Typ. Max. Unit Conditions Consumption Current 1 ICC1 µA VPWDOWN = ...

Page 5 RPM872 Photo Link Module Timing 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...

Page 6 RPM872 Photo Link Module Notes 1) VLEDA(8pin), VCC(3pin) and VIO(2pin) • Other power source can be used difference between VLEDA and VCC and VIO. (VIO < VCC +0.3V) 2) Caution in designing board lay...

Page 7 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...

Manual Details

Brand	ROHM
Pages	7
File Size	81.99 KB
Published	July 10, 2026

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Frequently Asked Questions

What is the intended operating frequency range?

The transmission rate is suitable for 2.4 to 115.2 kbps.

How is power consumption managed when in standby mode?

It is designed for low power at waiting mode, consuming 75µA (ICC1).

What voltages are required for the main components?

The module requires VCC (Supply voltage), VLEDA (LED Anode drive), and VIO (I/O Supply voltage), with specified ranges.

How do I put the device into a low-power state?

Connecting Pin 5 (PWDOWN) to 'H' will stop both receiving and transmitting functions.