Photointerrupters(Transmissive) KODENSHI SG-257 DIMENSIONS (Unit : mm) The SG–257 photointerrupter high– performance standard type,combines high–output GaAs IRED with high sensitive phototransistor. FEATURES •PWB direct mount type •GAP ：3.0mm •Snap–in mount •Horizontal slit •Convenient for vertical lever operation APPLICATIONS •Mouses •Rotary encoders •Facsimiles •Scanners MAXIMUM RATINGS Item Power dissipation Forward current Input Reverse voltage Pulse forward current *1 Collector power dissipation Collector current Output C-E voltage E-C voltage Operating temp.*2 Storage temp.*2 Soldering temp.*3 (Ta=25℃) Symbol Rating Unit PD IF VR IFP PC IC VCEO VECO Topr. Tstg. Tsol. 75 50 5 1 75 20 30 5 -20~+85 -30~+85 260 mW mA V A mW mA V V ℃ ℃ ℃ *1. pulse width ：ｔｗ≦100 μ sec.period ：T=10msec. *2. No icebound or dew *3. For MAX.5 seconds at the position of 1mm from the package ELECTRO-OPTICAL CHARACTERISTICS Item Forward voltage Reverse current Peak wavelength Output Collector dark current Light current TransmissioLeakage n current C-E saturation voltage Rise time Fall time Input Symbol VF IR λp ICEO Ic ICEOD VCE(sat) tr tf (Ta=25℃) Conditions IF =20mA VR=5V IF =20mA VCE=10V ( on–shading) IF=20mA, VCE=5V,N IF=20mA, VCE=5V(,shading) IF=20mA, IC=0.3mA VCC=5V, IC=2mA,RL=100Ω - 1- Min. Typ. 1.2 940 1 0.7 0.5 0.15 4 5 Max. Unit. 1.4 10 V μA nm nA mA μA V μsec. μsec. 100 14 10 0.4 Photointerrupters(Transmissive) SG-257 Collector power dissipation Vs. Ambient temperature Light current Vs. Collector-Emitter voltage Switching time Vs. Load resistance Forward current Vs. Forward voltage Light current Vs. Forward current Relative light current Vs. Ambient temperature Dark current Vs. Ambient temperature Relative light current Vs. Moving distance - 2-