ROHM RPM871-H12 Technical data
RPM871-H12
Photo Link Module
IrDA Infrared communication Module
RPM871-H12
RPM871-H12 is an infrared communication module for IrDA V er. 1.2 (Low Power). The infrared LED, PIN photo diode,
LSI are all integrated into a single package. This module is designed with power dow n function and low current
consumption at stand-by mode. The ultra small package makes it a perfect fit for mobile devices.
zFeatures
1) Infrared LED, PIN photo diode, LED driv er & Receiv er freq uency form ation circ uit built in. Impr ovement of EMI noise
protection because of Shield Case.
2) Applied to SIR (2.4 to 115.2kbps)
3) V
CC
supply voltage range is from 2.6V to 3.6V.
4) Surface mount type.
5) Power down function built in.
6) Adjustable communication distance by LED load resistance value. (approximately 20cm to 60cm)
zApplicat ions
Cellular phone, PDA, DVC, Digital Still Camera, Printer, Handy T erminal etc.
zAbsolute maximum ratings (Ta=25°C)
Parameter Symbol
Supply voltage V
Input voltage
Operation temperature
Storage temperature
LED peak current
Power dissipation
∗1 This applies to all pins basis ground pins (1.4pin)
∗2 LED peak current<90µs. ON duty<20%
∗3 When glass-epoxy board (70×70×1.6mm) mounted. In case operating environment is over 25°C,
2mW would be reduced per each 1°C stepping up.
max 7.0
in
V
Topr
Tstg
FP
I
Pd
Limits
∗1
−0.3 to Vcc+0.3
−20 to +85
−30 to +100
∗2
200
∗3
150
zRecommended operating conditions (Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit
Supply voltage
LED supply voltage
V
LEDV
CC
CC
3.0 V2.6 3.6
2.8 V2.6 5.5
Unit
V
V
°C
°C
mA
mW
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Photo Link Module
zBlock diagram and application c ircuit
AMP
GND
18765432
NC
RPM871-H12
AMP
AMP
POWER
DOWN
LED
DRIVER
VCC
GND
C1
PWDOWN
RXD
TXD
LEDA
VCC (3pin) and VLEDA (8pin) can be
used on either common power source
or different one
R1
VCC
GND
PWDOWN
RXD
TXD
(LEDV
CC)
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Photo Link Module
zT erminal description
Pin No
1, 4 GND
Terminal
RPM871-H12
Circuit Function
GND
Pin1 and Pin4 must be connected
to the ground.
2NC
3
5
6
7
CC
V
PWDOWN
RXD
TXD
PWDOWN
This Terminal must be left open.
V
CC
For preventing from infection, connect
a capacitor between V
GND (4pin).
V
CC
V
CC
V
CC
300k
V
CC
200K
Power-down Control Terminal
H : POWERDOWN
L : OPERATION
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 V
approximately 300kΩ.
Transmitting Data Input Terminal
H : LED (PWDOWN=L)
CMOS Logic Level Input
Holding TXD="H" status, LED will be
turn off approximately 45µs.
CC
(3pin) and
CC
at
LED ANODE Terminal
8
LEDA
Shield Case
LED
Other power source can be used
difference between LEDV
LED current depends on LED load
resistance value.
Connect to Ground.−
CC
and VCC.
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