RPM7238-R series
Photo Link Module
Rev.B 1/6
IR Receiver Module
RPM7238-R series
RPM7238-R s eries are remot e contro l receiver mod ule. Small-s ized, light- weight, and lo w voltage operated (from 2. 7V)
modules have been achieved by using resin mold.
zCenter frequenc y
37.9kHz
zA pplications
All househol d electric appliance s such as TV, DVD, air cond itioner and audio equ ipment.
zFeatures
1) Low volta ge operation. (V
CC
=2.7 to 3.6V)
2) Low current consumption. (I
CC
=0.3m A, V
CC
=3V)
3) Superior anti V
CC
noise characteristics.
4) 5 types of holde rs available to ea ch set.
zRPM7238-R series
SIDE VIEW TOP VIEW
RSIP-A3 (H9)
12.0mm
RPM7238-H9R
RSIP-A3 (H8)
7.2mm
RPM7238-H8R
RSIP-A3 (H13)
15.0mm
RPM7238-H13R
RSIP-A3 (H5)
9.6mm
RPM7238-H5R
RSIP-A3 (H4)
15.9mm
RPM7238-H4R
Height to lens
Products No.
zA bsolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits Unit
V
CC
6.3
−30 to +100
2.0
V
Output current
Tstg
IO
°C
mA
Supply Voltage
Storage temperature
−10 to +75
Topr °C
Operating temperature voltage
zRecommended operating conditions (Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit
Supply voltage V
CC
3.0 V2.7 3.6
RPM7238-R series
Photo Link Module
Rev.B 2/6
zBlock diagram
AMP
100kΩ
R
OU
T
GN
D
V
CC
I / V BPF
ComparatorLIMITER Detector
zTerminal description
Pin namePin No. Function
1V
OUT
OUTPUT TERMINAL
GROUND
POWER SUPPLY
2
3
GND
V
CC
zElectrical, Optical characteristics (Unless otherw ise noted, Ta = 25°C V
CC
=3V)
Isink
Outer light condition Ee < 10 (Ix)
Outer light condition Ee < 10 (Ix)
Outer light condition Ee < 10 (Ix)
<200µA
=
Parameter Symbol Min. Typ. Max. Unit Conditions
I
CC
V
H
L
V
L
T
ON
T
OFF
fo
300 µA
15
−
−
600
500
m−
V−
V
µs
0.5
800
θ 1/2
θ 1/2
600
37.9
∗1
∗1
∗1
∗1
∗1
∗2
∗2
−
8
400
2.5
−
400
−
−
−
35
45
µs800
kHz−
−
deg
deg
−
∗1 600/600µs burst wave is transmitted by standard transmitter. However, it must be measured after the initial transmission pulse is 10 pulse.
∗2 It is an angle when the linear arrival distance become half.
Consumption Current No outside light, No signal input
Effective Distance
High Level Output Voltage
Low Level Output Voltage
ON Pulse Width
OFF Pulse Width
Center frequency
Vertical half angle
Horizontal half angle
z Measurement Conditions
(1) Transmit signal
600µs 600µs
Fig.1 Transmit signal
Carrier frequency=fo, Duty=50%
RPM7238-R series
Photo Link Module
Rev.B 3/6
(2) S t andard transmitter
Fig.2 Measurement of standard transmitter proofreading
Standard transmitter R
20cm io=V
OUT
/ R
λ peak=940nm
λ=40nm
RPM-302B
V
OUT
∆
When standard transmitter output the signal at Fig.1 standard photodiode output become io=5µAp-p under the
measurement condi tion Fig.2.
(The radiant intensity of standard transmitter : 50mW / sr)
RPM-302B : standa rd photodiode has short current Isc=27 µA at Ee=1000(lx)
(using C IE standa rd light source A)
(3) Measurement ef fective dista nce, horizont al & vertical half an gle
Fig.3 Measurement condition for effective distance
RPM7238-R series
Light detector fac
e
illuminance : Ee
Effective distance : L
(θ ; Indicates horizontal and vertical directions)
θ
θ
S
tandard transmitter
Effective distance L : Effective distance at θ=0° Fig.3
Horizontal & vertical half angle θ: The angl e which ef fective distan ce became 50% of L.
RPM7238-R series
Photo Link Module
Rev.B 4/6
(4) Output signal
600µs
T
ON
T
OFF
V
CC
GND
1/2 V
CC
V
H
V
L
600µs
Fig.4
Carrier frequency=
f
0
Carrier Duty=50%
T
ransmit signal
O
utput signal
(5) Measurement circuit for the output voltage and the consumption current
Fig.5
V
CC
V
H
, V
L
V
C
C
I
CC
R
OUT
GND
A
V
RPM7238-R
RPM7238-R series
Photo Link Module
Rev.B 5/6
zNotes
(1) A ll characterist ics of the receiver i n this specificatio n are specified b y supplying burst wave form (Fig.1) with ROHM
standard tran smitter (Fig.2 ).
If in case of other bu rst wave form w ill be used , please check these spec. C arefully und er the evaluation s.
(2) When the recei ver will be used as th e wire-less remo te controller, please use the signal method th e signal forma t
which refer to “Measures to prevent mulfunctioning of IR remote-controlled electric home appliances”. (Published July
1987 by Association of Electric Home Appliances)
If using other signal method, signal format, (ex: signal format w hich not including the leader signal) the receiver might
have chance s to miss- function.
(3) Please set up transmitter’s carrier frequency as same as the receiver’ s f
0
frequency. Otherwise error migh t be
occurred.
(4) If transmission signal has non-continues carrie r , error might be occurred . Continuous carrier is nece ssary.
T1
T2
T1≠T2
(5) The receiver was designed to use as in-door use only.
Therefore, please understand that the receiver cannot cover all characteristics, in case of using it out-door .
(6) Noise environment (Light noise from inverter Lamp, and other kind of Lamps, Power ripple, electromagnetic noise from
power circuit, and etc) may cause a reduced effective distance.
(7) Th e receiver may not w ork properly if re ceiving signal judgem ent is done by single pulse due to the
surrounding / environmental noises.
To prevent such misjudgemen t, please make sure tha t the receiver is set up to work only when receiving
series of coded signal.
(8) Emitting unit (remote control transmitter) has to be considered about its emitting device function, characteristics and
characteristics of the receiver.
(9) Please connect ‘Holder’ on to the ‘Ground (GND)’ of PCB. If the holder is not connected to the GND, there is a
possibility of worsening the characteristics of product.
(10) Do not supply unnecessary stress to lead and holder .
(1 1) Please pay careful attention to the lens.
It might have a chance to mi ss-function when the lens ge t dust or dirty. And also please do not touch the lens .
(12) In order to prevent products from ESD, human body and solder iron, etc. are required to be grounded.
RPM7238-R series
Photo Link Module
Rev.B 6/6
zDimensions (Unit : mm)
RSIP-A3 (H8)
Rout
Pin No.
GND
VCC
RSIP-A3 (H4) RSIP-A3 (H9)
RSIP-A3 (H5)
3.6 1.8
7.3
2.542.54
15.9
4.2
2.35
1.4
1.4
0.4
0.60.6
0.5
12.65
7.0
2.95
0.65
6.3
1.4
4.61.4
2.5
0.4
1.89.0
12.55
3.6
2.542.54
2.95
1.0
6.0
0.5
0.60.6
7.3
3.6
0.60
0.60
1.80
0.30
2.35
1.40
1.40 0.65
12.65
3.60
12.00
3.60
0.40
123
2.95
7.00
2.54 2.54
7.30
0.50
1.80
0.60
0.60
0.30
123
7.00
7.30
2.54 2.54
0.50
2.95
3.60
0.651.40
2.351.40
9.25
0.40
3.607.20
RSIP-A3 (H13)
0.5
0.6 0.6
2.542.54
7.3
17.95
7.95
3.6
15.0
0.4
1.4 6.3
1.4 4.6 2.5
3.6
9.0 1.8
6.0
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.
