RPM872-H12
Photo Link Module
IrDA Infrared communication Module
RPM872-H12
RPM872-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) Surface mount type.
4) Power down function built in.
5) Low voltage operation as 1.5V of interface terminals to controller (TXD, RXD, Power down).
zApplica tions
Mobile phone, PDA, DVC, Digital Still Camera, Printer, Handy T erminal etc.
zAbsolute maximum ratings (Ta=25°C)
Parameter Symbol
V
in
(5, 6, 7pin)
Topr
Tstg
Pd
max
Supply voltage V
Input voltage
Operation temperature
Storage temperature
Power dissipation
∗1 This applies to all pins basis ground pins (1.4pin)
∗2 In case operating environment is over 25°C, 1.33mW would be reduced per each 1°C stepping up.
Limits
∗1
7.0
IO
+0.3
−30 to +85
−30 to +100
∗2
100
zRecommended operating conditions (Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit
Supply voltage
V
V
LEDA
V
CC
IO
3.0 V2.0 3.6
3.0 V2.6 5.5
3.0 V1.5 V
CC
Unit
V
V−0.3 to V
°C
°C
mW
Rev.A 1/6
Photo Link Module
zBlock diagram and application circuit
AMP
GND
18765432
V
IO
RPM872-H12
V
IO
AMP
AMP
POWER
DOWN
V
CC
+
GND
C1
PWDOWN
RXD
TXD
LEDA
VCC (3pin) and V
either common power source or different one
LEDA
(8pin) can be used on
V
CC
GND
PWDOWN
RXD
TXD
(LEDV
CC
)
Rev.A 2/6
Photo Link Module
zT erminal description
Pin No
1, 4 GND
Terminal
2V
3
5
IO
V
CC
PWDOWN
RPM872-H12
Circuit Function
GND
Pin1 and Pin4 must be connected
to the ground.
IO
V
Supply voltage for I/O pins.
(PWDOWN, RXD, TXD)
V
CC
Supply voltage for Transceiver circuits.
For preventing from infection, connect
a capacitor between V
GND (4pin).
V
IO
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.
CC
(3pin) and
V
IO
PWDOWN
6
RXD
300k
V
IO
Receiving Data Output Terminal
CMOS Logic Level Input
When PWDOWN (5pin)=H, the RXD
output will be pulled up to V
IO
at
approximately 300kΩ.
V
IO
Transmitting Data Input Terminal
H : LED (PWDOWN=L)
7
TXD
600k
CMOS Logic Level Output
Holding TXD="H" status, LED will be
turn off approximately 48µs.
LED ANODE Terminal
Other power source can be used
8
LEDA
LED
difference between LEDVCC and VCC.
This can be connected to battery kinds
of unegulated constant source by internal
constant current driver.
−
Shield Case
Connect to Ground.
Rev.A 3/6
Photo Link Module
zElectrical characteristics (Unless otherwise noted, V
Parameter
Consumption current1
Consumption current2
Transmission rate
PWDOWN input high voltage
PWDOWN input low voltage
PWDOWN input high current
PWDOWN input low current
<Transmitter>
TXD input high voltage
TXD input low voltage
TXD input high current
TXD input low current
LED anode current
<Receiver>
RXD output high voltage
RXD output low voltage
RXD output rise time
RXD output fall time
RXD output pulse width
Receiver latency time
Symbol Min. Typ. Max. Unit Conditions
I
CC
1
I
CC
2
−
0.01
−
2.4
IO
VPDH
VPDL
IPDH
IPDL
VTXH
VTXL
ITXH
ITXL
ILEDA
VRXH
VRXL
tRR
tFR
twRXD
tRT
2/3∗V
1.2
0
−1.0
−1.0
2/3∗V
1.2
0
2.5
−1.0
−
V
IO
−0.4
0
−
−
1.5
−
IO
30.5
2.3
100
zOptical characteristics (Unless otherwise noted, V
Parameter
Peak wave length
Intensity1
Half-angle
Optical pulse width
Rise time / Fall time
Symbol
λP
IE1
θL/2
TWLED
Tr/Tf
Optical over shoot
Edge jitter
Irradiance in angular
Input half-angle
Maximum emitting time
1. This product is not designed for protection against radioactive rays.
2. This product dose not include laser transmitter.
3. This product includes one PIN photo diode.
4. This product dose not include optical load.
Tj
Ee
θD/2
TLEDmax
Min. Typ. Max. Unit
850
−
−
−40
0.0068
±15
10
CC=3V , VLEDA=3 V, VIO=3V , Ta=25°C)
870 nm
104.0
±18
1.631.42
48
CC=3V , VLEDA=3 V, VIO=3V , Ta=25°C)
75
−
−
−
0
0
−
−
5
0
−
−
35
35
99
0.2
V
IO
1/3∗V
VIO−1.2
1.0
1.0
−
1/3∗V
VIO−1.2
10
1.0
−
V
IO
0.4
−
−
4.2
200
µA
PWDOWN=0V At no input light
µA
PWDOWN=V
kbps115.2
VIO=1.8 to 3.6 [V]
V
IO
=1.5 to 1.8 [V]
V
V
IO
IO
V
µA
µA
V
IO
V
µA
µA
=1.8 to 3.6 [V]
IO
=1.5 to 1.8 [V]
V
PWDOWN=V
PWDOWN=0 [V]
IO
=1.8 to 3.6 [V]
V
IO
=1.5 to 1.8 [V]
V
IO
=1.8 to 3.6 [V]
V
IO
=1.5 to 1.8 [V]
V
TXD=V
IO
TXD=0 [V]
mA
V
IRXH=
−200µA
V
IRXL=200µA
ns
C
L
=15pF
ns
C
L
=15pF
µs
C
L
=15pF, 2.4 to 115.2kbps
µs
900
mW/Sr26
±30
2.02
100
−
−−
−
500
−
−
mW/cm
−
120
−15°≤θ
deg
TXD=1.63µs pulse input
µs
10% to 90%
ns
%25
ns40
2
−15deg ≤ θ
deg
TXD=V
µs
IO
At no input light
IO
[V]
[V]
Conditions
L
≤15°
L
≤ +15deg
IO
RPM872-H12
Rev.A 4/6
Photo Link Module
zTiming chart
(Emitting side)
TXD
(7pin)
less than 48µs
RPM872-H12
more than 48µs
Internal LED
(Light output)
(Detecting side)
Light input
RXD
(6pin)
PWDOWN
(5pin)
less than 2.3µs more than 2.3µs
zAtt ached compone nts
Recommended values
Part symbol
C1
Recommended value
1µF, tantalum or ceramic
Ex.) TCFGA1A105M8R (ROHM)
(emitting)
(emitting)
approximately 48µs
approximately 2.3µsapproximately 2.3µs
Notice
Bigger capacitance is recommended with much noise from power supply
(emitting)
pull up to V
IO
at approximately 300kΩ
Rev.A 5/6
RPM872-H12
Photo Link Module
zNotes
LEDA (8pin), VCC (3pin) and VIO (2pin)
1) V
•
Other power source can be used difference between VLEDA and VCC and VIO.
(V
IO < VCC + 0.3V)
2) Caution in designing board lay-out
T o get maximum potential from RPM872-H12, please keep in mind follow ing instruction.
•
The line of RXD (6pin) should be connected at backside via through hole close to RPM872-H12 pin lead. Better not to
be close to photo diode side (1pin).
⇒This is to minimize feedback supplied to photo diode from RXD.
•
As for C1 between 3-4 pin should be placed close to RPM872-H12.
•
Better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also away from the parts w hich
generates noise, such as DC
3) Others
•
Please be sure to set up the TXD (7pin) input to be “L” (under 0.3V) except transmitting data
(for < 90µs, on duty < 20%).
•
Power down current might increase if exposed by strong light (ex. direct sunlight) at pow erdow n mode.
•
Please use by the signal format which is specified by IrDA Ver1.2 (Low Power).
•
There might be on error if used by different signal format.
•
Please pay attention to the lens carefully. Dusts of scratch on the lens may effect the characteristics of product.
Please handle it with care.
4) Eye safe
•
IEC825-1 (EN60825-1) Class 1 Eye Safe.
zExternal dimensions (Unit : mm)
/
DC converter.
2.72
3.0
3.0
PinPD
8.0
5.6
2.8
0.56
1
P0.95×7=6.65
7.6
0.6±0.1
0.68±0.1
LED
A
8
0.6
0.37±0.1
0.6±0.1
2.4
0.84±0.1
2.49
NOTE
TOLERANCE
COPLANARITY:0.1mmMAX
UNIT:mm
0.15±0.1
2.0
1.75
A Part Size (Shield Case underside size)
0.75
3.0
±0.2mm
ETH450
Rev.A 6/6
Appendix
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
Notes
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1
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