RPM873-E4A Rohm Semiconductor, RPM873-E4A Datasheet - Page 5

• Manufacturer Part Number: RPM873-E4A
• Description: MODULE IRDA 115.2KBPS 8SMD
• Manufacturer: Rohm Semiconductor

Specifications of RPM873-E4A

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Photo Link Module
1) VLEDA (8pin) and V
2) Caution in designing board lay-out
3) Notes
4) Eye Safe
(Detecting side)
To get maximum potential from RPM873, please keep in mind following instruction.
(Emitting side)
Timing chart
Notes
•Other power source can be used difference between VLEDA and V
•The line of RXD (6pin) should be connected at backside via through hole close to RPM873 pin lead.
•Better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also away from the parts which
•As for C1 between 3-4pin should be placed close to RPM873.
•Please be sure to set up the TXD (7pin) input to be “L” (under 0.55V) except transmitting data
•Power down current might increase if exposed by strong light (ex. direct sunlight) at power down mode.
•Please use by the signal format which is specified by lrDA Ver1.2 (2.4k to 115.2kbps).
•IEC825-1 (EN60825-1) Class 1 Eye Safe.
TXD
Internal LED
(Light output)
Light input
RXD
Better not to be close to photo diode side (1pin).
⇒This is to minimize feedback supplied to photo diode from RXD.
generate noise, such as DC / DC converter.
(for<90µs, ON duty<20%)
There might be on error if used by different signal format.
(7pin)
(6pin)
PWDOWN
(5pin)
less than 48 µs
less than 2.3 µs
CC
(3pin)
approximately 2.3 µs
(emitting)
more than 2.3 µs
approximately 48 µs
more than 48 µs
(emitting)
CC
.
(emitting)
pull up to V
300 kΩ
Rev.B
CC
at approximately
RPM873
5/6