QSE157 Ver la hoja de datos (PDF) - Fairchild Semiconductor

Número de pieza

componentes Descripción

Fabricante

QSE157

Plastic Silicon OPTOLOGIC® Photosensor

Fairchild Semiconductor 

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 = 360Ω

R2 = 180Ω

C1 = 15 pf

C2 = 20 pf

C1 and 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

©1.0.0 Fairchild Semiconductor Corporation

QSE156/C, QSE157/C, QSE158/C, QSE159/C Rev. 1.0.0

6

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