74HC595 Datasheet, PDF (6/8 Pages) NXP Semiconductors – 8-bit serial-in/serial or parallel-out shift register with output latches; 3-state

AC SWITCHING WAVEFORM AND AC TEST CIRCUIT
Voltage Waveforms 1. Propagation Delay and Output Transition Times
Input
50%
tPLH
In-Phase
Output
50% ^90%
10%
tr
tPHL
90%
Out-of-Phase
Output
50%
10%
tf
Vcc
50%
0V
tPHL
90% _50% ^VOH
10% _VOL
tf
tPLH
50%
90% ^VOH
10%
VOL
tr
WS74HC595
Voltage waveforms 2. Enable And Disable Times For 3-State Outputs
Output
Control
(Low-Level
Enabling)
Output
Waveform1
Output
Waveform
2
50%
tPZL
tPZH
≈Vcc
50%
50%
50%
tPLZ
10%
90%
tPHZ
Vcc
0V
≈Vcc
VOL
VOH
≈0 V
Voltage waveforms 3. Setup And Hold and Input Rise And Fall Times
Reference
Input
50%
Data
Input
50%
10%
tsu
90%
tr
th
90%
Vcc
0V
Vcc
50%
10% _{0 V}
tf
6