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MC74HCT374A
http://onsemi.com
5
SWITCHING WAVEFORMS
Figure 1.
t
r
t
f
V
CC
GND
t
THL
t
TLH
90%
1.3 V
10%
2.7 V
1.3 V
0.3 V
CLOCK
t
PLH
t
PHL
Q
t
w
1/f
max
1.3 V
1.3 V
1.3 V
OUTPUT
ENABLE
Q
t
PZL
t
PLZ
t
PZH
t
PHZ
10%
90%
3 V
GND
HIGH
IMPEDANCE
V
OL
V
OH
HIGH
IMPEDANCE
1.3 V
DATA
CLOCK
3 V
3 V
GND
GND
VALID
t
h
t
su
1.3 V
Figure 2.
Figure 3.
Q
TEST CIRCUITS
Figure 4.
EXPANDED LOGIC DIAGRAM
C
D0
D1
D2
D3
D4
D5
D6
D7
3
4
7
8
13
14
17
18
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
5
6
9
12
15
16
19
D
Q
CLOCK
OUTPUT
ENABLE
11
1
*Includes all probe and jig capacitance
C
L
*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
*Includes all probe and jig capacitance
C
L
*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
CONNECT TO V
CC
WHEN
TESTING t
PLZ
AND t
PZL
CONNECT TO GND WHEN
TESTING t
PHZ
AND t
PZH
1 k
Figure 5.
C
D
Q
C
D
Q
C
D
Q
C
D
Q
C
D
Q
C
D
Q
C
D
Q