WS74HC595
AC SWITCHING WAVEFORM AND AC TEST CIRCUIT
Voltage Waveforms 1. Propagation Delay and Output Transition Times
Input
Vcc
50%
tPLH
50%
0V
tPHL
In-Phase
Output
50%
10%
tPHL
90%
90%
tr
Out-of-Phase
Output
50%
10%
t
f
50%
10% V
OL
t
f
tPLH
V
OH
90%
50%
10%
V
OL
tr
90%
V
OH
Voltage waveforms 2. Enable And Disable Times For 3-State Outputs
Output
Control
(Low-Level
Enabling)
Output
Waveform1
50%
tPZL
≈Vcc
50%
50%
tPLZ
Vcc
0V
≈Vcc
V
OL
V
OH
≈0
V
10%
90%
tPHZ
tPZH
Output
Waveform
2
50%
Voltage waveforms 3. Setup And Hold and Input Rise And Fall Times
Reference
Input
50%
Vcc
0V
t
su
t
h
90%
Vcc
50%
10%
t
f
Data
Input
50%
10%
90%
tr
0V
6