HD74LS373
Testing Method
Test Circuit
V
CC
Output
R
L
S
1
Load circuit 1
4.5V
1Q
5kΩ
OC
Input
P.G.
Z
out
= 50Ω
1D
2D
2Q
Output
3Q
Output
4Q
Output
5Q
Output
6Q
Output
7Q
Output
8Q
Output
C
L
S
2
Same as Load Circuit 1.
Same as Load Circuit 1.
Same as Load Circuit 1.
Same as Load Circuit 1.
Same as Load Circuit 1.
Same as Load Circuit 1.
Same as Load Circuit 1.
See Function Table
3D
4D
5D
6D
7D
8D
G
Input
P.G.
Z
out
= 50Ω
Notes:
1. C
L
includes probe and jig capacitance.
2. All diodes are 1S2074(H).
Waveforms 1
t
TLH
90 %
1.3 V
10 %
t
PLH
t
THL
90 %
1.3 V
10 %
t
PHL
3V
0V
Data
V
OH
Q
S
1
, S
2
Closed
1.3 V
1.3 V
V
OL
Note:
Input pulse; t
TLH
≤
15 ns, t
THL
≤
6 ns, PRR = 1 MHz, duty cycle 50%
Rev.2.00, Feb.18.2005, page 4 of 7