QSE156(2004) 查看數據表（PDF） - Fairchild Semiconductor

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QSE156
(Rev.:2004)

PLASTIC SILICON OPTOLOGIC® PHOTOSENSOR

Fairchild Semiconductor 

PLASTIC SILICON

OPTOLOGIC® PHOTOSENSOR

QSE156 QSE157 QSE158 QSE159

Fig. 8 Switching Speed Test Circuit

C2

R2

Pulse

Generator

VO = 5V

f = 10 KHz

d.c. = 50%

5V

R1

.1 uf

bypass

C1

GND

R1 = 360 Ω

R2 = 180 Ω

C1 = 15 pf

C2 = 20 pf

C1and C2 include probe and

stray wire capacitance

Fig. 9 Switching Times Definition for Buffers

50%

0 mA

tPLH

VOH

Output

VO

t PHL

90%

10%

50%

VOL

tr

10%

90%

tf

Fig. 10 Switching Times Definition for Inverters

50%

0 mA

tPHL

t PLH

VOH

Output

VO

10%

90%

90%

VOL

tf

10%

tr

© 2004 Fairchild Semiconductor Corporation

Page 6 of 7

8/4/04

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