©2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FOD852 Rev. 1.5 7
FOD852 — 4-Pin DIP Photodarlington Output Optocoupler
Test Circuits
Input
Vcc
Vcc
10%
90%
Input
Output
Output
td
tr
ts
tf
Output
R
L
R
D
R
D
R
L
Figure 14. Test Circuit for Response Time
Figure 15. Test Circuit for Frequency Response
