ROHM RPM870-H14 Technical data
RPM870-H14
Photo Link Module
IrDA wireless communication transceiver
IC (supports Ver. 1.2 Low Power)
RPM870-H14
The RPM870-H14 is an Module that supports IrDA V er . 1.2 (Low Power), and is ideal for wireless communications.
An infrared LED, a pin-photo diode, and LSI are all contained in a very small single package. It is also equipped with low
power consumption and power down functi ons making this IC perfect for mobile se ts.
zFeatures
1) Applied to IrDA V er . 1.2. (Low Power)
2) Low power consumption while waiting mode. (90µA Typ.).
3) A power-down function is perfect for batte ry applications.
4) Supports a board power supply voltage range fro m 2.6V to 3.6V.
5) Only 1 external capacitor required.
zApplications
Mobile phones, PDAs, and others
zAbsolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
Supply voltage V
Input voltage Vin
Operating temperature
Storage temperature
Power dissipation
zRecommended operating conditions (Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit
Supply voltage
V
V
LEDA
Topr
Tstg
Pd
CC
CC
7.0
−0.3 to V
−20 to +85
−30 to +100
100
3.0 V2.6 3.6
3.0 V2.6 5.5
V
CC
+0.3
V
°C
°C
mW
1/6
Photo Link Module
zBlock diagram and application circuit
AMP
RPM870-H14
GND
1
NC
234567
Recommended values
Part symbol
C1
Recommended value
1µF, tantalum
Ex.) TCFGA1A105M8R (ROHM)
AMPAMP
V
POWER
DOWN
CC
GND
PWDOWN
RXD
TXD
LEDA
8
C1
V
CC
GND
PWDOWN
RXD
TXD
(LEDV
Notice
Bigger capacitance is recommended with much noise from power supply
CC
)
2/6
Photo Link Module
zT ermina l description
Circuit Function
V
CC
V
CC
300k
3
5
6
Terminal
CC
V
PWDOWN
RXD
PWDOWN
Pin No
1, 4 GND GND
RPM870-H14
This terminal must be left open.2NC
V
CC
For preventing from ripple noise.
connect a capacitor between
V
CC
(3pin) and GND (4pin).
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.
V
CC
Receiving data output terminal
CMOS logic level input
When PWDOWN (5pin) = H, the RXD
output will be pulled up to
V
CC
at approximately 300kΩ.
V
CC
7
8
TXD
LEDA
200K
LED
Transmitting data input terminal
H : LED Drive (PWDOWN = L)
CMOS logic level output
Holding TXD = "H"status, LED will
be turn off approximately 48µsec.
LED ANODE terminal
Other power source can be used
difference between LEDV
CC
and VCC.
3/6
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