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Letex Technology Corp.
Subminiature Photointerrupter
Model No: LBT-125
Features
˙Compact package based on the double-mold method.
˙High resolution (slit width = 1.2mm).
˙Gap between emitter and detector is 2.0mm.
Applications
˙Floppy disk drives
˙Printers
˙Cameras
Outline Dimensions (Unit: mm)
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Letex Technology Corp.
Subminiature Photointerrupter
(Ambient Temperature: 25
V eco
Storage T emperature
T stg
Operating Temperature
Soldering Temperature
T sol
(Ambient Temperature: 25
V iew angle
Rise Time
Fall Time
Model No: LBT-125
Absolute Maximum Ratings
Forward current IF 50 mA
Reverse voltage VR 5 V
Input
Peak forward current IFP 1 A
Power dissipation Pd 75 mW
Collector current Ic 50 mA
Collector-Emitter voltage Vceo 30 V
Emitter-Collector voltage
Output
Collector power dissipation Pc 100 mW
Electrical Specifications
Input
Output
Light current Ic(on) 0.5 mA
Leakage current ILeak 1 µA
Speed
℃)
Item Symbol Rating Units Note
Tw=10μs,
t=10ms
5 V
℃
℃
℃
5 seconds max.
T op -25 to +85
-40 to +85
260
℃)
Item Symbol MIN. TYP. MAX. Units Conditions
Forward voltage VF 1.2 1.4 V
Reverse current IR 10 µA
Peak wavelength
λp
2θ1/2
940 nm
35 Deg.
Dark current Iceo 100 nA
C-E saturation voltage Vce(sat) 0.4 V
tr
tf
5
5
IF=20mA
VR=5V
IF=20mA
Vce=20V
Ic=2mA, IB=0.1mA
Vce=5V
IF=20mA
Vce=5V
Ic=1mA
µs
RL=1KΩ
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Letex Technology Corp.
Subminiature Photointerrupter
Reference Data
Forward Voltage
Fig.6 Collector Current vs.
Fig.5 Collector Current vs.
Fig.3 Peak Forward Current vs.
Fig.11 Relative Collector Current vs.
Fig.9 Response Time vs.
Load Resistance
Fig.2 Collector Power Dissipation vs.
Fig.7 Collector Current vs.
Test Circuit for Response Time
Ambient Temperature
Fig.8 Collector-Emitter Saturation Voltage vs.
Ambient Temperature
Fig.1 Forward Current vs.
Ambient Temperature
Forward current IF (mA)
Ambient temperature Ta (℃)
Duty Ratio
Peak forward current IFM (mA)
Forward Current
Pulse width ≦100μs
Ta=25℃
Duty ratio
Vce=5V
Ta=25℃
Ambient Temperature
Collector power dissipation Pc (mW)
Ambient temperature Ta (℃)
Fig.4 Forward Current vs.
Forward current IF (mA)
Forward voltage VF (V)
Collector-Emitter Voltage
Ta=25℃
Ta=25℃
Ambient Temperature
Collector current IC (mA)
Ambient temperature Ta (℃)
Vce=2V
Ic=2mA
Ta=25℃
Response time (μs)
Load resistance RL (KΩ)
Shield Distance
X Y
IF=20mA
Vce=5V
Ta=25℃
IF=20mA
Vce=5V
Collector-Emitter saturation voltage Vce(sat) (V)
Ambient temperature Ta (℃)
Fig.10 Collector Dark Current vs.
Vce=20V
Collector dark current Iceo (A)
Ambient temperature Ta (℃)
IF=40mA
Ic=0.5mA
Collector current IC (mA)
Forward current IF (mA)
Collector current IC (mA)
Collector-Emitter voltage Vce (V)
RElative Collector current Iceo (%)
Shield distance L (mm)
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