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| Photointerrupter Model No: LBT-121 Features Compact package based on the double-mold method. High resolution (slit width = 0.5mm). Gap between emitter and detector is 5.0mm. Applications Floppy disk drives Printers Cameras Outline Dimensions (Unit: mm) --1-- Letex Technology Corp. Photointerrupter Model No: LBT-121 Absolute Maximum Ratings (Ambient Temperature: 25) Item Symbol Rating Forward current IF 50 Reverse voltage VR 5 Input Peak forward current IFP 1 Power dissipation Collector current Collector-Emitter voltage Output Emitter-Collector voltage Collector power dissipation Storage Temperature Operating Temperature Soldering Temperature Pd Ic Vceo Veco Pc Tstg Top Tsol 75 50 30 5 100 -40 to +85 -25 to +85 260 Units mA V A mW mA V V mW Note Tw=10s, t=10ms 5 seconds max. Electrical Specifications (Ambient Temperature: 25) Item Symbol MIN. Forward voltage VF Reverse current IR Input Peak wavelength p View angle 21/2 Dark current Iceo Output C-E saturation voltage Vce(sat) Light current Ic(on) 0.5 Leakage current ILeak Rise Time tr Speed Fall Time tf TYP. 1.2 940 35 MAX. 1.4 10 100 0.4 1 5 5 Units V A nm Deg. nA A mA A s Conditions IF=20mA VR=5V IF=20mA Vce=20V Ic=2mA, IB=0.1mA Vce=5V IF=20mA Vce=5V Ic=1mA RL=1K --2-- Letex Technology Corp. Photointerrupter Reference Data Forward current Vs. Ambient temperature 60 2000 Peak forward current Vs. Duty ratio 50 100 Power dissipation (mW) Peak forward current ( mA) 1000 500 200 100 50 20 Pulse width 100us Ta = 25 Forward current (mA) 40 80 30 60 20 40 10 20 0 -30 0 25 50 75 100 125 0 -25 0 25 50 75 100 125 10 5 10 -3 2 5 10 -2 2 5 10 -1 2 5 10 0 Ambient temperature () Ambient temperature () Duty ratio Forward current Vs. Forward voltage 500 200 Ta = 75 50 25 0 Collector current Vs. Forward current 12 12 Collector current Vs. Collector-Emitter voltage Ta = 25 10 Vce = 5V Ta = 25 10 50mA 40mA Forward current (mA) Collector current (mA) 100 50 20 10 5 2 1 0 0.5 1.0 1.5 25 8 Collector current (mA) 8 30mA 6 6 20mA 4 4 2 2 IF=10mA 0 2.0 2.5 3.0 0 10 20 30 40 50 0 0 1 2 3 4 5 6 7 8 9 10 Forward voltage (V) Forward current (mA) Collector-Emitter voltage (V) Collector current Vs. Ambient temperature 8 7 Response time Vs. Load resistance 500 200 100 10-5 Collector dark current Vs. Ambient temperature Vce = 20V IF = 20mA Vce = 5V 6 5 4 3 2 1 50 20 10 5 2 1 0.5 0.2 Collector dark current (A) Vce = 2V Ic = 2mA Ta = 25 10-6 10-7 10-8 10-9 10-10 10-11 Collector current (uA) Response time (s) tf td tr ts 2 5 10 0 -25 0 25 50 75 100 0.1 0.03 0.05 0.1 0.2 0.5 1 -25 0 25 50 75 100 Ambient temperature () Load resistance (k ) Ambient temperature () C-E Saturation voltage Vs. Ambient temperature 0.30 Relative collector current Vs. Shield distance 100 Test circuit for resopnse time IF = 40mA Ic=1mA Relative collector current ( %) 0.25 80 IF = 20mA Vce = 5V Ta=25 Vcc Input Input RD RL Output Output 10% C-E Saturation voltage (V) 0.20 60 90% 0.15 40 0.10 0.05 0 -25 20 0 0 25 50 75 100 -2 -1 0 1 2 -2 -1 0 1 2 Ambient temperature () Shield distance (mm) --3-- Letex Technology Corp. |
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