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Photointerrupter (Reflective) NPNEC ST178
 NPNEC ST178 , Lot 100 "Pin It")
Photointerrupter (Reflective) NPNEC ST178
ST178 ● Features ·Combines high output GaAs IRED with highsensitive phototransistor. ·The detecting range is between 4~10mm. ·Non-contact detecting manner. ● Applications ·IC card electric power meter. ·AMR system. ·Water meter. ·OA equipment: facsimile, printer, copier etc. ·Combined with direction detector IC(ST288A),it can be used as detecting moving objectdirection, speed of clockwise/ counterclockwiserotation and moving distance etc. ● Dimensions Unit:mm Unless otherwise specified, the tolerances are ±0.2mm ●Absolute Maximum Ratings(Ta=25℃) Parameter Symbol Rating Unit Forward Current IF 50 mV Reverse Voltage VR 6 V Input Power Dissipation P 75 mW Collector-Emitter Voltage VCEO 25 V Emitter-Collector Voltage VECO 6 V Output Collector Power Dissipation PC 50 mW *Operating Temperature Topr -20～65 ℃ Storage Temperature Tstg -30～75 ℃ ** Soldering Temperature Tsol 260 ℃ *The special requirement could be met according to customer’s request. **Soldering time: 5s max. Soldering position: at least 2.5mm from the base of the package. ● Electro-Optical Characteristics(Ta=25℃) Parameter Symbol Test Condition Min. Typ. Max. Unit Forward Voltage VF IF=20mA - 1.25 1.5 V Input Reverse Current IR VR=3V - - 10 μA Collector Dark Current ICEO VCE=20V - - 1 μA L3 0.3 - - L4 0.4 - - Collector Light Current IL VCE=5V IF=8mA L5 0.5 - - mA Output Collector-Emitter Saturation Voltage VCE(SAT) IF=8mA Ic=0.15mA - - 0.4 V Rise Time Tr - 10 - Transfer Character -istics Response Time Fall Time Tf IF=20mA VCE=5V RC=100Ω - 10 - μS Notes: Collector light current IL, Collector-emitter saturation voltage VCE(SAT), Relative current , Response time is measured within 2~5mm between photointerrupter’s top and reflecting surface. The value is affected by the smooth of light reflecting surface. Photointerrupter(Reflective) ST178
·Distance in Fig.2 is from photointerrupter’s top to the reflecting surface. ·The reflecting surface is a sub-reflection aluminium plate. its surface is parallel to the top of photointerrupter. ·When relative collector current rises to 1.0, the conversion efficiency is the highest under this distance. ·The curves above are for you reference.
ST178 ● Features ·Combines high output GaAs IRED with highsensitive phototransistor. ·The detecting range is between 4~10mm. ·Non-contact detecting manner. ● Applications ·IC card electric power meter. ·AMR system. ·Water meter. ·OA equipment: facsimile, printer, copier etc. ·Combined with direction detector IC(ST288A),it can be used as detecting moving objectdirection, speed of clockwise/ counterclockwiserotation and moving distance etc. ● Dimensions Unit:mm Unless otherwise specified, the tolerances are ±0.2mm ●Absolute Maximum Ratings(Ta=25℃) Parameter Symbol Rating Unit Forward Current IF 50 mV Reverse Voltage VR 6 V Input Power Dissipation P 75 mW Collector-Emitter Voltage VCEO 25 V Emitter-Collector Voltage VECO 6 V Output Collector Power Dissipation PC 50 mW *Operating Temperature Topr -20～65 ℃ Storage Temperature Tstg -30～75 ℃ ** Soldering Temperature Tsol 260 ℃ *The special requirement could be met according to customer’s request. **Soldering time: 5s max. Soldering position: at least 2.5mm from the base of the package. ● Electro-Optical Characteristics(Ta=25℃) Parameter Symbol Test Condition Min. Typ. Max. Unit Forward Voltage VF IF=20mA - 1.25 1.5 V Input Reverse Current IR VR=3V - - 10 μA Collector Dark Current ICEO VCE=20V - - 1 μA L3 0.3 - - L4 0.4 - - Collector Light Current IL VCE=5V IF=8mA L5 0.5 - - mA Output Collector-Emitter Saturation Voltage VCE(SAT) IF=8mA Ic=0.15mA - - 0.4 V Rise Time Tr - 10 - Transfer Character -istics Response Time Fall Time Tf IF=20mA VCE=5V RC=100Ω - 10 - μS Notes: Collector light current IL, Collector-emitter saturation voltage VCE(SAT), Relative current , Response time is measured within 2~5mm between photointerrupter’s top and reflecting surface. The value is affected by the smooth of light reflecting surface. Photointerrupter(Reflective) ST178
·Distance in Fig.2 is from photointerrupter’s top to the reflecting surface. ·The reflecting surface is a sub-reflection aluminium plate. its surface is parallel to the top of photointerrupter. ·When relative collector current rises to 1.0, the conversion efficiency is the highest under this distance. ·The curves above are for you reference.
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