RPM871-H12 
 
Photo Link Module
 
 
 
5/7 
 
Timing chart
less than 45祍
(emitting)
more than 45祍
approximately 45祍
less than 2.3祍
more than 2.3祍
approximately 2.3祍
approximately 2.3祍
pull up to VCC at approximately 300k&
(emitting)
(emitting)
Emitting side)
(Detecting side)
TXD
 (7pin)
Internal LED
 (Light output)
Light input
RXD
 (6pin)
PWDOWN
 (5pin)
 
 
 
Attached components 
Recommended values
Part symbol
C1
Recommended value
Notice
1礔, tantalum or ceramic
Ex.) TCFGA1A105M8R (ROHM)
Bigger capacitance is recommended with much noise from power supply
R1
7.5&?%, 1/4W
(VLEDVCC=2.8V)
More than 60cm distance, more than 4[礧/cm
2
] at detecting side.
(vs ver1.0)
More than 46cm distance, more than 6.8[礧/cm
2
] at detecting side.
(vs RPM871-H12)
 
 
In case of using R1 with different condition from the above, formula is as follows :
LED resistance value : R1[&], LED average consumption current : ILED[mA], Supply voltage : VLEDVCC[V],
necessary d[cm] (Including LEDs distribution within ?5deg)
 
R1=T ?(VLEDVCC4.45) / d
2
3.5 [&]
ILED=Duty ?(VLEDVCC1.36) / (R1+2.5) [A]
 
Duty : LED duty at emitting
T : 17300 (vs. RPM871-H12), 29400 (vs. ver1.0)
 
 Please set up to be ILED / Duty < 200[mA] (Duty < 20%)
 
 
 
 
相关PDF资料
RPM871-H14E2 MODULE IRDA 115.2KBPS 8SMD
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RPM872-H12E4 MODULE IRDA 115.2KBPS 8SMD
RPM872-H14E2 MODULE IRDA 115.2KBPS 8SMD
RPM873-E2 MODULE IRDA 115.2KBPS 8SMD
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