RPM841-H11
Photo Link Module
1/9
IrDA Infrared Communication Module
RPM841-H11
RPM841-H11 is an infrared communication module for IrDA Ver . 1.2 (Low Pow er). 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 driv er & Receiv er fr equency 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) Surface mount type.
4) Power dow n function built in.
5) Super small package (W=6.8mm, D=2.44mm, H=1.5mm).
6) Infrared remote control transmission driver built-in.
zA pplications
Mobile phone, PDA, DVC, Digital S till Ca mera, Printer , Handy Terminal etc.
zA bsolute maximum ratings (Ta=25°C)
Parameter Symbol Limits Unit
Supply voltage V
max
7.0 ∗
−30 to +85
−40 to +100
V
V−0.3 to V
CC
+0.3
Operation temperature
Storage temperature
Input voltage
Topr
Tstg
V
in
(3, 4, 5pin)
°C
°C
∗ This applies to all pins basis ground pins (7pin)
zRecommended operating conditions (Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit
Supply voltage
LED supply voltage
VCC 3.0 V2.4 3.6
VLEDVCC 3.0 V2.6 5.5
RPM841-H11
Photo Link Module
2/9
zBlock diagram and applica tion circuit
VCC (6pin) and LEDVCC (1pin)
can be used on either common power source
or different one
AMP
AMP
AMPAMP
6
7
V
CC
GND
V
CC
TX-RC
GND
TX-RC
PWDOWN
RXD
TXD
LEDA
PWDOWN
RXD
TXD
(LEDV
CC
)
C1
+
4
POWER
DOWN
2
R1
1
3
5
RPM841-H11
Photo Link Module
3/9
zTerminal description
Terminal Circuit Function
Pin No
Ground Termianl
Power Supply Terminal
For preventing from infection, connect
a capacitor between VCC (6pin) and
GND (7pin).
Connect to Ground.
RC Transmitting Data Input Terminal
H : LED Emitting (Remote Control Mode)
CMOS Logic Level Input
Holding TX-RC='H' status, LED will be
turn off approximately 48µs.
Power-down Control Terminal
CMOS Logic Level Input
When input is 'H', it will stop the receiving
circuit and Pin-PD current.
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
TXD input at PWDOWN=L
H : LED Emitting
CMOS Logic Level Input
Holding TXD="H" status, LED will be
turn off approximately 48µs.
LED ANODE Terminal
Other power source can be used
difference between LEDVCC and VCC.
1
2
3
4
LEDA LED 1
TX-RC
V
CC
240k
TXD
V
CC
240k
RXD
5
6
7
−
V
CC
300k
PWDOWN
PWDOWN
V
CC
V
CC
GND
Shield Case
RPM841-H11
Photo Link Module
4/9
zElectrical characteristics (Unless otherwise noted, VCC= 3.0V, VLEDVCC=3.0V , Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Consumption current1 I
CC
1
I
CC
2
VPDH
VPDL
IPDH
IPDL
90 µAPWDOWN=0V At no input light
PWDOWN=V
CC
At no input light
PWDOWN=V
CC
Consumption current2
Data 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/TX-RC input high current
TXD/TX-RC input low current
LED anode current (IrDA Mode)
−
0.01
−
0
−
2.4
−
−
2/3∗V
CC
120
µA
0.2
kbps115.2
V
V
V
CC
1/3∗V
CC
<Transmitter>
<Receiver>
VTXH
VTXL
ITXH
ITXL
ILEDA1
VRXH
VRXL
tRR
tFR
tRT
twRXD
PWDOWN=0V
TXD=V
CC
or TX-RC=V
CC
TXD=0V or TX-RC=0V
TXD=V
CC
TX-RC=V
CC
, R1=2.2Ω
0
−1.0
2/3∗V
CC
0
6.2
−1.0
−
0
−
−
1.7
−
V
CC
−0.4
0
−1.0
−
−
12.5
0
50
−
−
25
25
2.6
40
µA
1.0
µA
1.0
V
V
µA
µA
mA
V
V
ns
ns
µs
µs
V
CC
1/3∗V
CC
25
1.0
70
LED anode current (RC Mode) ILEDA2 −211 mA
245
V
CC
0.4
100
100
3.5
200
IRXH=
−200µA
IRXL=200µA
C
L
=15pF
C
L
=15pF
C
L
=15pF, 2.4 to 115.2kbps
V
CC
=2.4 to 3.6V
V
CC
=2.4 to 3.6V
V
CC
=2.4 to 3.6V
V
CC
=2.4 to 3.6V
TX-RC input high voltage
TX-RC input low voltage VTX-RCH
VTX-RCL 1.5
0
−
−
V
V
V
CC
0.5 V
CC
=2.4 to 3.6V
V
CC
=2.4 to 3.6V
zOptical characteristics (Unless otherwise noted, V CC= 3.0V, VLEDVCC=3.0V, Ta=25°C)
Parameter Symbol Min. Typ. Max. Unit Conditions
Peak wave length1 (IrDA Mode) λP1
λP2
θD/2
TLEDmax
TWLED2
Tr/Tf
Tj
888 nm
ILED=200mA, Duty20%
ILED=50mA, Duty20%, −20 to 60°C
ILED=50mA, Duty20%
TXD=0 V
CC
or TX-RC=0 V
CC
TXD=1.63µs pulse input R
1
=2.2Ω
TX-RC=10µs pulse input R
1
=2.2Ω
10% to 90%
Peak wave length2 (RC Mode)
Optical pulse width2 (RC Mode)
Optical over shoot
Edge jitter
Input half-angle
Maximum emitting time
880
890880
9.5 10
892
−nm
nm
850 900
920
µs
deg
µs
10.5
−−
−
−
48
−40
±15
20.5
%25
Rise time / Fall time 20−ns120
ns40
EemaxMaximum Irradiance in angular mW/cm
2
−
500 −
EeminMinimum Irradiance in angular µW/cm
2
4.0
−8.1
−
96
IE1Intensity1 (IrDA Mode) 124 mW/sr28
IE2Intensity2 ( RC Mode) 5025 mW/sr120
θL/2Half-angle −±15 deg−
TWLED1
Optical pulse width1 (IrDA Mode) 1.631.42 µs
2.02
−15° θ
L
15° R
1
=2.2Ω
−15° θ
L
15° R
1
=2.2Ω
−15° θ
L
+15°
−15° θ
L
+15°
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.
RPM841-H11
Photo Link Module
5/9
zLED Operation Mode Table
PWDOWN
(5pin)
L
L
L
H
H
H
TX-RC
(4pin)
L
L
L
L
TXD
(7pin) LED
Emitting Mode IrDA Receiver
Operation Condition
L
L
L
L
OFF
IrDA
RC
OFF
OFF
RC
ON
ON
ON
OFF
OFF
OFF
Notes) Please be sure to set up the TX-RC (2pin) and the TXD (3pin) input to be ''L'' (under 0.3V)
except transmitting data (for
<
90µs. ON Duty 50%).
of TX-RC (2pin) and TXD (3pin) in the table above is supposed to be the pulse input.
When either TX-RC (2pin) input TXD (3pin) input keeps the state of ''H'' (more than appproximately 48µs),
LED will be turned off due to LED pulse width limiting circuit if the pulse is input from the other terminal.
Therefore, don't use as the normal transmitting is impossible.
Please input the pulse when both TX-RC (2pin) and TXD (3pin) are ''L''.
zInterface operating timing
(Emitting side)
(1) When TXD output for IrDA and TXD output for controller are different lines.
IrDA
Controller
RC Transmitting
Controller
(BU787X etc)
V
CC
V
CC
LEDV
CC
GND
1
7
TX-RC
PWDOWN
RXD
TXD
LEDA
RPM841-H11
Photo Link Module
6/9
(2-a) RC transmitting mode at IrDA receiver active condition.
IrDA IrDARC RC
TXD
(3pin)
Min 1µsMin 1µs
TX-RC
(2pin)
PWDOWN
(5pin)
LED Emitting
∗
If TX-RC or TXD input pulse width is wider than 48µs, output LED emitting pulse will be turn off approximately 48µs.
Emitting Mode
Input Condition
PWDOWN
L
L
L
H
TX-RC LED Mode
L
L
L
OFF
IrDA
RC
OFF
Recriver circuit
ON
ON
ON
OFF
TXD
L
L
L
RPM841-H11
Photo Link Module
7/9
(2-b) RC transmit mode at IrDA receiver pow er down condition.
IrDA IrDARC RC
TXD
(3pin)
Min 1µsMin 1µs
Min 1µsMin 1µs
TX-RC
(2pin)
PWDOWN
(5pin)
LED Emitting
∗
If TX-RC or TXD input pulse width is wider than 48µs, output LED emitting pulse will be turn off approximately 48µs.
Emitting Mode
Input Condition
PWDOWN
L
L
H
H
TX-RC LED Mode
L
L
L
OFF
IrDA
RC
OFF
Recriver circuit
ON
ON
OFF
OFF
TXD
L
L
L
(Receiving side)
Min 200µs
Light input
PWDOWN
(5pin)
RXD
(4pin) Pull up to VCC at
approximately 300kΩ
∗
RXD output width is fixed approximately 2.6µs.
Note RXD output become stable after 200µs since PWDOWN is changed from H to L.
RXD output could be unstable at H to L within 200µs.
RPM841-H11
Photo Link Module
8/9
zA tta ched 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 supply
R1 2.2Ω±5%, 1/8W
(VLEDV
CC
=3V) At LED Emitting Duty=25%
[LED current set-up method for Remote control mode]
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 : VLEDVCC[V],
minimum necessary of irradiant intensity le1 [mW / sr]
(Including LED’s distribution w ithin ±15deg)
R1=166 × (VLEDVCC−1.31) / le1−7.2
ILED=Duty × (VLEDVCC−1.31) / (R1+5.8)
Duty : LED duty at emitting
∗ Please set up to be ILED / Duty < 250[mA] (Duty ≤ 25%)
∗ At IrDA Mode, LED current is constantly approximately 50mA.
(Reference) In case of using R1, typical intensity (le1typ) and maximum intensity (le1max) on
axis are described as below.
le1typ=280 × (VLEDVCC−1.31) / (R1+5.8)
le1max=560 × (VLEDVCC−1.31) / (R1+5.8)
zNotes
1) LEDVCC (1pin), VCC (6pin)
• Other power source can be used difference between LEDVCC and VCC.
2) Caution in designing board lay-out
To get maximum potential from RPM841-H11, please keep in mind following instruction.
• The line of RXD (4pin) should be connected at backside via through hole close to RPM841-H1 1 pin lead. Better not to
be close to photo diode side (7pin).
⇒This is to minimize feedback supplied to photo diode from RXD.
• As for C1 between 6-7 pin should be placed close to RPM841-H11.
• Better to be placed more than 1.0cm in radius from photo diode (pin7 side) and also aw ay from the p arts which
generates noise, such as DC
/
DC converter .
3) Notes
• Please be sure to set up the TX-RC (2pin) and the TXD (3pin) input to be “L” (under 0.3V) except transmitting data
(for < 90µs, ON duty ≤ 50%).
• Powe r down current might increase if exposed by str ong light (ex. direct sunlight) at powerdow n mode.
• Please use by the signal format at IrDA operating mode which is specified by IrDA V e r1.2 (2.4k to 115.2kbps). There
might be on error if used by dif ferent signal format.
• Please pay attention to the lens carefully.
Dusts of scratch on the lens may effect the characteristics of product. Please handle it w ith care.
RPM841-H11
Photo Link Module
9/9
4) Eye safe
• IEC60825-1 (IEC60825-1 amendment2), Class 1 Eye Safe.
5) LED current derating and amdient temperature
The relation between LED peak current and maximum ambient temperature is shown below.
We recommend you to use w ithin the range as indicated in below.
When glass-epoxy board (50×50×1.6mm) mounted.
−200 2040608010
AMBIENT TEMPERATURE : Ta
(°C)
0
MAXIMUM LED PEAK CURRENT : Iledp (mA)
50
100
150
200
250
300
0
Duty:15%
Duty:10%
Duty:20%
Duty:25%
zExternal dimensions (Unit : mm)
RPM841-H1 1
LED PD
NOTE
1.TOLERANCE:±0.2
UNIT:mm
ETH774
0.68
6.8
3.4
2.38
2.16
0.95
P0.95
×
6=5.7
0.37
±
0.1
6.4
1.1
1.5
0.1
±
0.1
2.18
2.44
0.16
2.09
0.4
R0.83 R0.9
7pin1pin
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.
