RPM870-H14
Photo Link Module
5/6
zTiming chart
more than 48 µsec
approximately 48 µsec
less than 2.3 µsec more than 2.3 µsec
approximately 2.3 µsecapproximately 2.3 µsec
pull up to V
CC
at
approximately 300kΩ
(Emitting side)
(Detecting side)
TXD
(7pin)
Internal LED
(Light output)
Light input
RXD
(6pin)
PWDOWN
(5pin)
less than 48 µsec
(emitting) (emitting) (emitting)
zNotes
1) LEDV
CC (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.
