RPM873
Photo Link Module
Rev.B
3/6
Terminal description
This terminal must be left open.
Terminal
Circuiit
Funciton
Pin No.
1
GND
GND
Power-down control terminal
CMOS logic level input
When input is H, it will stop the receiving
circuit, PINPD current and transmitting
LED operation.
H : Power down
L : Operation
Receiving data output teminal
CMOS logic level output
When PWDOWN (5pin) = H, the RXD output will
be pulled up to VCC at approximately 300k&.
Transmitting data input terminal
H : LED (PWDOWN = L)
CMOS logic level input
Holding TXD = H status, LED will be
turned off at approximately 48祍.
LED ANODE terminal
Other power source can be used
difference between VLEDA and VCC.
This can be connected to battery kinds of unregulated
voltage source by internal constant current driver.
2
NC
PWDOWN
RXD
TXD
LEDA
3
4
5
6
7
8
VCC
GND
GND
VCC
For preventing from infection, connect a capacitor
between VCC(3pin) and GND(4pin).
LED
VCC
VCC
PWDOWN
300K
VCC
VCC
600k
发布紧急采购，3分钟左右您将得到回复。
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