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