WS74HC373
VDD
R
C
L
Parameter
tPZH
S1
S2
L
50 pF
or
150 pF
Open
Closed
S1
Test
Point
t
1kΩ
1kΩ
en
R
L
tPZL
tPHZ
tPLZ
Closed
Open
Open
Closed
Open
From Output
Under Test
t
50 pF
CL
dis
S2
Closed
(see Note A)
50 pF
or
150 pF
Open
Open
tpd or tt
-
A. CL includes probe and test-fixture capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when
disabled by the output control.
Notes:
Waveform 2 is for an output with internal conditions such that the output is high except when
disabled by the output control.
C. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by
generators having the following characteristics:
PRR≤ 1 MHz, Zo = 50Ω, tr=6ns, tf =6ns.
D. The outputs are measured one at a time with one input transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
PIN DESCRIPTION
PIN NO.
SYMBOL
DESCRIPTION
Data Inputs
3, 4, 7, 8, 13, 14, 17, 18
1D - 8D
1Q - 8Q
GND
OE
2, 5, 6, 9, 12, 15, 16, 19
Outputs
10
1
Ground (0V)
Output-enable
latch-enable
11
20
LE
VCC
Positive power supply
11
20
1
VCC
OE
1Q
LE
2
3
1D
2D
3D
1Q
2Q
3Q
8Q
4
5
1D
2D
8D
7D
7Q
6Q
7
6
8
9
4D
5D
6D
7D
4Q
5Q
6Q
7Q
2Q
13
14
17
18
12
15
16
19
3Q
3D
6D
4D
5D
5Q
8Q
8D
4Q
OE
GND
10
1
11
LE
Logic Symbol
Pin Configuration (DIP-20)
5
Wing Shing [ WING SHING COMPUTER COMPONENTS ]
