Test Diagrams (Continued)
tRISE = 750ps
tFALL= 750ps
0.4V
Input – VD+/D-
GND
10%
V OH
Output- VOUT
VOL
90%
50%
50%
tpLH
90%
50%
10%
50%
tpHL
Figure 17. USB Switch Propagation Delay Waveforms
tRISE= 750ps
tFALL= 750ps
0.4V
Input – VD+/D-
GND
10%
V OH
Output- VOUT
VOL
90%
50%
50%
tpLH
90%
50%
10%
50%
tpHL
Figure 18. Pulse Skew: tSK(P)=| tPHL – tPLH |
tRISE= 750ps
tFALL= 750ps
0.4V
Input – VD+/D-
GND
10%
VOH
Output1- VOUT
VOL
90%
50%
50%
tpLH1
90%
50%
10%
tpHL1
50%
VOH
Output2- VOUT
VOL
50%
tpLH2 tpHL2
tsk(o )
50%
Figure 19. Output Skew: tSK(O)=| tPLH1 – tPLH2 | or | tPHL1 – tPHL2 |
© 2007 Fairchild Semiconductor Corporation
FSA223 • Rev. 1.0.4
10
www.fairchildsemi.com