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RPM870-H14 
Photo Link Module 
 
 
 
5/6 
 
Timing chart
more than 48 祍ec
approximately 48 祍ec
less than 2.3 祍ec
more than 2.3 祍ec
approximately 2.3 祍ec
approximately 2.3 祍ec
pull up to VCC at
approximately 300k&
(Emitting side)
(Detecting side)
TXD
(7pin)
Internal LED
(Light output)
Light input
RXD
(6pin)
PWDOWN
(5pin)
less than 48 祍ec
(emitting)
(emitting)
(emitting)
 
 
 
Notes
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). 
襎his 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 < 90祍ec. 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.
 
 
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