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LTPH245 Datasheet(PDF) 42 Page - Seiko Instruments Inc |
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LTPH245 Datasheet(HTML) 42 Page - Seiko Instruments Inc |
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42 / 64 page  3-29 Table 3-13 Detectors Input/Output Conditions Item Symbol Conditions Standard Max. Forward voltage VF IF=10mA 1.2V 1.6V LED (input) Reverse current IR VR=5V − 10 µA Photo- transistor (output) Dark current I CEO If=0mA, VCE=10V − 200nA Photo electric current IC IF=10mA, VCE=5V − 350 µA Leak current ILEAK IF=10mA, VCE=5V − 1 µA Collector saturation voltage VCE(sat) IF=10mA, IC=50 µA − 0.5V Response time (at rise) tr IC=1mA, VCC=5V 5 µs- Transfer characteristics Response time (at fall) tf RL=100 Ω 5 µs − 3.7.2 Sample External Circuit Figure 3-12 Sample External Circuit of the Paper Detector PS VPS GND Photo interruptor CPU Port Vdd (5V) Vdd (5V) 47k Ω 220 Ω GND LTPH245 * The PS signal is high when there is no paper. 470pF 74HC04 |
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