RPM872 데이터 시트보기 (PDF) - ROHM Semiconductor
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RPM872 Datasheet PDF : 7 Pages
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Photo Link Module
zTerminal description
Pin No Terminal
1, 4
GND
Circuit
RPM872
GND
Function
2
VIO
3
VCC
5 PWDOWN
6
RXD
VIO
PWDOWN
VIO
VIO
300k
VIO
Supply voltage for I/O pins (PWDOWN,
RXD, TXD)
VCC
Supply voltage for Transceiver circuits.
For preventing from infection,
connect a capacitor between
VCC(3pin) and GND(4pin).
Power-down Control Terminal
H : POWERDOWN MODE
L : OPERATING MODE
CMOS logic level input
When input is H, it will stop the receiving
circuit, Pin-PD current and transmitting
LED operation.
Receiving Data Output Terminal
CMOS logic level output
When PWDOWN (5pin) = H, the RXD
output will be pulled up to
VIO at approximately 300kΩ.
7
TXD
VIO
600k
Transmitting Data Input Terminal
H : LED (PWDOWN = L)
CMOS logic level input
Holding TXD = "H"status, LED will
be turn off approximately 48µs.
8
LEDA
LED ANODE Terminal
Other power source can be used
LED
difference between LEDVCC and VCC.
This can be connected to battery kinds
of unregulated voltage source by internal
constant current driver.
Rev.B
3/6
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