SIR-320ST3F
Sensors
Infrared light emitting diode, top view type
SIR-320ST3F
The SIR-320ST3F is a GaAs infrared light emitting diode housed in clear plastic. This device has a high luminous
efficiency and a 940nm spectrum suit able for silicon detec tors. It is small and at the same time has a wide radiation a ngle,
marking it ideal for compact optical control equipment.
zApplications
Optical control equipmen t
Light source for remote control devi ces
zFeatures
1) Compact (φ3.1mm).
2) High efficiency, high output P
O=9.0mW (IF=50mA).
3) Wide radiation angle θ=±18deg.
4) Emission spectrum well suited to silicon detectors
(λ
P=940nm).
5) Good current-optical output linearity.
6) Long life, high reliability .
zAbsolute maximum ratings (Ta = 25°C)
Parameter Symbol
Forward current
Reverse voltage
Power dissipation
Pulse forward current
Operating temperature
Storage temperature
∗ Pulse width=0.1msec, duty ratio 1%
I
F
V
P
I
FP
Topr
Tstg
R
D
∗
Rev.B 1/3
zDimensions (Unit : mm)
Limits
75
5
100
0.5
−25 to +85
−40 to +85
Unit
mA
mW
°C
°C
2− 0.5
V
A
4−0.6
φ3.8±0.3
1
(2.5)
φ3.1±0.2
Notes:
1. Unspecified tolerance
1.1Max.12.5±1
2. Dimension in parenthesis are
5.2±0.3
Min.24
2
2±0.2
shall be ±0.2.
show for reference.
1
Anode
2
Cathode
SIR-320ST3F
Sensors
zElectrical and optical characteristics (Ta = 25°C)
Max.
−
−
1.5
10
−
−
−
−
−
Unit
mW
mW/sr
deg
MHz
−25°C
0°C
25°C
50°C
75°C
I
F
=50mA
F
=50mA
I
V
F
=50mA
I
µA
V
R
=3V
nm
F
=50mA
I
nm
I
F
=50mA
F
=50mA
I
F
=50mA
µs
I
I
F
=50mA
(%)
O
100
80
60
40
20
RELATIVE OPTICAL OUTPUT : P
0
850 900 950 1000 1050
OPTICAL WAVELENGTH : λ (nm)
Conditions
Fig.3 Wavelength
Typ.
P
V
λ
∆λ
I
I
1 / 2
f
Min.
O
E
5.6
F
R
P
C
9
−
−
1.2
−
−
−
940
−
40
−
±18
−
1.0
−
1.0
−
Parameter
Optical output
Emitting strength
Forward voltage
Reverse current
Peak light emitting wavelength
Spectral line half width
Half-viewing angle
Pesponse time
Cut-off frequency
Symbol
θ
tr·tf
zElectrical and optical characteristic curves
100
80
(mA)
F
60
40
20
FORWARD CURRENT : I
0
−20 0 20 40 60 80 100
AMBIENT TEMPERATURE : Ta (°C)
FIg.1 Forward current falloff
100
(mA)
F
80
60
40
20
FORWARD CURRENT : I
0
012
FORWARD VOLTAGE : VF (V)
Fig.2 Forward current vs. forward voltage
50
40
(mW/sr)
E
30
20
10
EMITTING STRENGTH : I
0
200 406080100
FORWARD CURRENT : I
Fig.4 Emitting strength vs.
forward current
F
(mA)
(%)
E
200
100
50
20
10
RELATIVE EMITTING STRENGTH : I
−20 80 1006040200
AMBIENT TEMPERATURE : Ta (°C)
Fig.5 Radiant intensity vs.
ambient temperature
Rev.B 2/3
Sensors
50°
60°
70°
40°
30°
20°
10°
100
80
60
40
SIR-320ST3F
80°
90°
100 80 60 40 20 0
RELATIVE EMITTING STRENGTH (%)
Fig.6 Directional pattern
10°
20°
30°
40°
50°
60°
70°
80°
90°
100 80 60 40 20 0
RELATIVE EMITTING STRENGTH (%)
Fig.7 Directional pattern
10°0°20° 30° 40° 50° 60° 70° 80° 90°
ANGULAR DISPLACEMENT : θ(deg)
0°
no masking
10° 20° 30° 40° 50° 60° 70° 80° 90°
ANGULAR DISPLACEMENT : θ(deg)
20
RELATIVE EMITTING STRENGTH (%)
0
100
80
60
40
20
RELATIVE EMITTING STRENGTH (%)
0
Rev.B 3/3
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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