RPM870-H14 Просмотр технического описания (PDF) - ROHM Semiconductor

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Компоненты Описание

производитель

RPM870-H14

IrDA wireless communication transceiver IC (supports Ver. 1.2 Low Power)

ROHM Semiconductor 

Photo Link Module

zTiming chart

(Emitting side)

TXD

(7pin)

less than 48 µsec

(emitting)

more than 48 µsec

(emitting)

Internal LED

(Light output)

(Detecting side)

approximately 48 µsec

Light input

less than 2.3 µsec

more than 2.3 µsec

RXD

(6pin)

approximately 2.3 µsec

approximately 2.3 µsec

RPM870-H14

(emitting)

pull up to VCC at

approximately 300kΩ

PWDOWN

(5pin)

zNotes

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-H14, please keep in mind following instruction.

• The line of RXD (6pin) should be connected at backside via through hole close to RPM870-H14 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-H14.

• 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.

• Please pay attention to the lens carefully. Dusts of scratch on the lens may effect the characteristics of product. Please

handle it with care.

4) Eye Safe

• IEC825-1 (EN60825-1) Class 1 Eye Safe.

5/6

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