RPM873 データシートの表示（PDF） - ROHM Semiconductor

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RPM873

IrDA Infrared Communication Module

ROHM Semiconductor 

Photo Link Module

zTerminal description

Pin No. Terminal

1 GND

2

NC

3

VCC

4

GND

5

PWDOWN

Circuiit

VCC

RPM873

GND

Funciton

This terminal must be left open.

VCC

For preventing from infection, connect a capacitor

between VCC(3pin) and GND(4pin).

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.

6

RXD

PWDOWN

VCC

VCC

300K

Receiving data output teminal

CMOS logic level output

When PWDOWN (5pin) = H, the RXD output will

be pulled up to VCC at approximately 300kΩ.

7

TXD

8

LEDA

VCC

600k

LED

Transmitting data input terminal

H : LED (PWDOWN = L)

CMOS logic level input

Holding TXD = H status, LED will be

turned off at approximately 48µs.

LED ANODE terminal

Other power source can be used

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

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