
TO OUTPUT
UNDER TEST
VCC
RL
SW1
SN74LS373, SN74LS374
SN74LS373
AC LOAD CIRCUIT
SWITCH POSITIONS
SYMBOL
SW1
SW2
tPZH
tPZL
tPLZ
tPHZ
Open
Closed
Closed
Closed
Closed
Open
Closed
Closed
5.0 kΩ
CL*
SW2
* Includes Jig and Probe Capacitance.
Figure 4.
SN74LS374
AC WAVEFORMS
tWH
CP
Dn
tPLH
OUTPUT
tWL
1.3 V 1.3 V
1.3 V
ts
th
1.3 V
tPHL
1.3 V
1.3 V
Figure 5.
OE
tPZL
VOUT
1.3 V
1.3 V
Figure 6.
1.3 V
tPLZ
≈ 1.3 V
VOL
0.5 V
OE
tPZH
VOUT
1.3 V
tPHZ
1.3 V
Figure 7.
1.3 V
≥ VOH
≈ 1.3 V
0.5 V
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