RPM871-H12
Photo Link Module
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IrDA Infrared communication Module
RPM871-H12
RPM871-H12 is an infrared communication module for IrDA Ver . 1.2 (Low Power). The infrared LED, PIN photo diode,
LSI are all integrated into a single package. This module is designed with pow er down 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 di ode, LED dr iver & Receiv er freq uency fo rmation c ircuit built i n. Improvem ent 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 dow n function built in.
6) Adjustable communication distance by LED load resistance value. (approximately 20cm to 60cm)
zA pplications
Cellular phone, PDA, DVC, Digital S till Camera, Printer, Handy Terminal etc.
zAbsolute maximum ratings (Ta=25°C)
Parameter Symbol Limits Unit
Supply voltage Vmax 7.0
∗1
−20 to +85
−30 to +100
V
mA
V
200
∗2
−0.3 to Vcc+0.3
Operation temperature
Storage temperature
LED peak current
Input voltage
Topr
Tstg
IFP
mW
150
∗3
Power dissipation Pd
Vin
°C
°C
∗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.
zRecommended opera ting conditions (Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit
Supply voltage
LED supply voltage
V
CC
3.0 V2.6 3.6
LEDV
CC
2.8 V2.6 5.5
RPM871-H12
Photo Link Module
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zBlock diagram and a pplication circuit
AMP
18765432
AMP
AMP
POWER
DOWN
LED
DRIVER
VCC
VCC
GND
C1
R1
GND
NC
GND
PWDOWN
RXD
TXD
LEDA
PWDOWN
RXD
TXD
(LEDVCC)
V
CC
(3pin) and VLEDA (8pin) can be
used on either common power source
or different one
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Photo Link Module
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zTerminal description
Terminal Circuit Function
Pin No
1, 4 GND GND
Pin1 and Pin4 must be connected
to the ground.
This Terminal must be left open.
Power-down Control Terminal
CMOS Logic Level Input
When input is H, it will stop the receiving
circuit, Pin-PD current and transmitting
LED operation.
H : POWERDOWN
L : OPERATION
Receiving Data Output Terminal
CMOS Logic Level Output
When PWDOWN (5pin)=H, the RXD
output will be pulled up to VCC at
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.
LED ANODE Terminal
Other power source can be used
difference between LEDVCC and VCC.
LED current depends on LED load
resistance value.
2NC
PWDOWN
RXD
TXD
LEDA
3
5
6
7
8
Shield Case
Connect to Ground.−
V
CC
V
CC
For preventing from infection, connect
a capacitor between V
CC
(3pin) and
GND (4pin).
VCC
VCC
200K
LED
VCC
VCC
300k
PWDOWN
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Photo Link Module
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zElectrical characteristics (Unless otherwise noted, V
CC
=2.8V, VLEDV
CC
=2.8V, Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Consumption current1 ICC1
ICC2
VPDH
VPDL
IPDH
IPDL
73 µAStand-by for receiving At no input light
PWDOWN PIN High At no input light
PWDOWN=VCC [V]
Consumption current2
Transmission rate
PWDOWN input high voltage
PWDOWN input low voltage
PWDOWN input high current
PWDOWN input low current
TXD input high voltage
TXD input low voltage
RXD output high voltage
RXD output rise time
RXD output fall time
RXD output pulse width
Receiver latency time
RXD output low voltage
TXD input high current
TXD input low current
LED anode current
−
0.01
−
−
−
2.4
−
−
VCC−0.55
99
µA
0.2
kbps115.2
V
V
−
0.55
<Transmitter>
<Receiver>
VTXH
VTXL
ITXH
ITXL
ILEDA
VRXH
VRXL
tRR
tFR
tRT
twRXD
PWDOWN=0 [V]
TXD=VCC [V]
TXD=0 [V]
R1=7.5 [Ω]
0
−1.0
VCC−0.55
−
7
−1.0
−
−
−
−
1.5
−
VCC−0.5
0
−1.0
−
−
14
0
144
−
−
70
30
2.3
100
µA
1.0
µA
1.0
V
V
µA
µA
mA
V
V
ns
ns
µs
µs
−
0.55
28
1.0
−
−
0.4
−
−
3.6
300
IRXH= −50µA
IRXL=200µA
CL=15pF
CL=15pF
CL=15pF, 2.4 to 115.2kbps
zOptical characteristics (Unless otherwise noted, V
CC
=2.8V, VLEDV
CC
=2.8V, Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Peak wave length
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.
λP
IE1
θL/2
θD/2
TLEDmax
Tr/Tf
Tj
Ee
870 nm
−15° ≤ θL ≤ 15°
R1=7.5 [Ω]
−15deg ≤ θL ≤ +15deg
TXD=V
CC
10% to 90%
Intensity1
Half-angle
Rise time / Fall time
Optical over shoot
Edge jitter
Irradiance in angular
Input half-angle
Maximum emitting time
850
3614.4
−
±18
−
−
900
mW/Sr93.6
mW/cm
2
deg
ns
deg
µs
±30
100
−−
−
−
−
45
−40
0.0068
±15
10
%25
ns40
500
−
120
RPM871-H12
Photo Link Module
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zTiming chart
less than 45µs
(emitting)
more than 45µs
approximately 45µs
less than 2.3µs more than 2.3µs
approximately 2.3µsapproximately 2.3µs
pull up to VCC at approximately 300kΩ
(emitting) (emitting)
(
Emitting side)
(Detecting side)
TXD
(7pin)
Internal LED
(Light output)
Light input
RXD
(6pin)
PWDOWN
(5pin)
zA ttac hed component s
Recommended values
Part symbol
C1
Recommended value Notice
1µF, tantalum or ceramic
Ex.) TCFGA1A105M8R (ROHM) Bigger capacitance is recommended with much noise from power supp
ly
R1 7.5Ω±5%, 1/4W
(VLEDV
CC
=2.8V)
More than 60cm distance, more than 4[µW/cm2] at detecting side.
(vs ver1.0)
More than 46cm distance, more than 6.8[µW/cm2] at detecting side.
(vs RPM871-H12)
In case of using R1 with dif ferent condition from the above, formula is as follow s :
LED resistance value : R1[Ω], LED average consumption current : ILED[mA], Supply voltage : VLEDV
CC
[V],
necessary d[cm] (Including LED’ s distribution within ±15deg)
R1=T × (VLEDV
CC
−4.45) / d
2
−3.5 [Ω]
ILED=Duty × (VLEDV
CC
−1.36) / (R1+2.5) [A]
Duty : LED duty at emitting
T : 17300 (vs. RPM871-H12), 29400 (vs. ver1.0)
∗ Please set up to be ILED / Duty < 200[mA] (Duty < 20%)
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Photo Link Module
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zNotes
1) LEDV
CC
(8pin) and V
CC
(3pin)
•
Other power source can be used dif ference between LEDV
CC
and V
CC
.
2) Caution in designing board lay-out
To get maximum potential from RPM871-H12, please keep in mind following instruction.
•
The line of RXD (6pin) should be connected at backside via through hole close to RPM871-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 RPM871-H12.
•
Better to be placed more than 1.0cm in radius from photo diode (pin1 side) and also aw ay from the part s which
generates noise, such as DC
/
DC converter .
3) Others
•
Please be sure to set up the TXD (7pin) input to be “L” (under 0.55V) except transmitting dat a
(for < 90µs, on duty < 20%).
•
Power dow n current might increase if exposed by strong light (ex. direct sun light) at powerdow n mode.
•
Please use by the signal format w hich is specified by IrDA V er1.2 (2.4k to 1 15.2kbp s). There might be on error if used
by different signal format.
4) LED current derating and ambient temperature
The relation between LED peak current and maximum ambient temperature is show n below .
We recommend y ou to use within the range as indicated in below.
a) When glass-epoxy board (70×70×1.6mm) mounted.
−200 2040608010
0
AMBIENT TEMPERATURE : Ta
(°C)
0
MAXIMUM LED PEAK CURRENT : Iledp (mA
)
50
100
150
200
250
Duty=10%
Duty=20%
b) RPM871-H12
−200 2040608010
0
AMBIENT TEMPERATURE : Ta
(°C)
0
MAXIMUM LED PEAK CURRENT : Iledp (mA
)
50
100
150
200
250
Duty=10%
Duty=20%
RPM871-H12
Photo Link Module
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zExternal dimensions (Unit : mm)
UNIT:mm
NOTE
TOLERANCE
±0.2mm
COPLANARITY:0.1mmMAX
PinPD LED
8
1
ETH450
0.6
2.4
3.0
8.0
3.0
2.8
5.6
0.56
0.37±0.1
0.6±0.1
0.68±0.1
0.6±0.1
7.6
P0.95
×
7=6.65
A
2.49
2.72
2.0
0.15±0.1
1.75
0.84±0.1
0.75
3.0
A Part Size (Shield Case underside size)
Appendix
Appendix1-Rev1.1
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.
Notes
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.
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.
