Owner's manual

4
Standard ICs BU4538B
•
Timing chart
tW tW t2 t3 tW
t1
A
B
C
D
Q
Q
t1, t2, t3 < tW
•
Measurement circuits
P. G.
P. G.
P. G. CLCL
VDD
RX
CX
CD
A
V
DD T2 T1
B
Q
Q
Fig. 1 (a) Switching time
VSS
A
B
C
D
Q
Q
50%
90%
50%
10%
20ns
20ns
50%
50%
50%
50%
50%
50%
50%
50%
20ns
20ns
t
rr
90%
10%
90%
50%
10%
20ns
20ns
tPLH
tPHL
tPHL
tWOUT
tPLH
tTHL
tTLH
tTLH
tPHL
tTHL
tPHL
90%
90%
10%
10%
90%
10%
50%
tWOUT
Fig. 1 (b) Switching time measurement waveforms