ROHM RPM871-H14 Technical data

Photo Link Module

RPM871-H14

IrDA Infrared communication Module

RPM871-H14

RPM871-H14 is an infrared communication module for IrDA V er. 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 pow er dow n function and
low current consumption at stand-by mode. The ultra small p ackage makes it a perfect fit for mobile devices.

zFeatures

1) Applied to IrDA version 1.2. (Low Power)

2) Designed for low power consumption at stand-by for receiving (Typ.73 µA).

3) Suitable for sets driven by battery due to power down control function.

4) Power supply voltage range : 2.6V to 3.6V

5) Constant LED load resistance can change communication range. (Approx. 20 to 60cm)

zApplicat ions

Cellular phones, PDAs, etc.

zAbsolute maximum ratings (Ta = 25°C)

Parameter Symbol Limits Unit

Power supply voltage V

Input voltage

Power dissipation
Operating temperature range
Storage temperature range
LED peak current

∗1 70mm×70mm, t=1.6mm, glass epoxy mounting. Derating : 2mW/°C for operation above Ta=25°C
∗2 LED peak current<90µs. ON duty<20%

CC

Vin

Pd
Topr
Tstg

I

FP

7.0

−0.3 to VCC+0.3

∗1

150

−20 to +85

−30 to +100

∗2

200

zRecommended operating conditions (Ta = 25°C)

Parameter Symbol Min.

Power supply voltage

CC

V

LEDA

V

Typ. Max.

3.0

2.8

3.6

5.5

1/7

mW

mA

Unit

V2.6
V2.6

V
V

°C
°C

Photo Link Module

zBlock diagram and application c ircuit

AMP

GND

18765432

NC

RPM871-H14

AMP

AMP

POWER

DOWN

LED

DRIVER

VCC

GND

C1

PWDOWN

RXD

TXD

LEDA

VCC (3pin) and VLEDA (8pin) can be used on
either common power source or different one.

R1

VCC

GND

PWDOWN

RXD

TXD

(LEDV

CC)

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Photo Link Module

zT erminal description

Pin No

1, 4 GND

Terminal

RPM871-H14

Circuit Function

GND
Pin1 and pin4 must be connected to the
ground.

2NC

3

5

6

7

V

CC

PWDOWN

RXD

TXD

PWDOWN

This Terminal must be left open.
V

CC

For preventing from infection, connect
a capacitor between V
GND (4pin).

V

CC

V

CC

V

CC

300k

V

CC

200K

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.

Receiving Data Output Terminal
CMOS Logic Level Output

When PWDOWN (5pin)=H, the RXD
output will be pulled up to V
approximately 300kΩ.

Transmitting Data Input Terminal
H : LED (PWDOWN=L)
CMOS Logic Level Input

Holding TXD="H" status, LED will be
turn off approximately 45µs.

CC

(3pin) and

CC

at

LED ANODE Terminal

8

−

LEDA

Shield Case

LED

Other power source can be used
difference between LEDV
LED current depends on LED load
resistance value.

Connect to Ground.

CC

and VCC.

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