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Description
74HC574 View Datasheet(PDF) - ON Semiconductor
Part Name
Description
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74HC574
Octal 3−State Noninverting D Flip−Flop
ON Semiconductor
74HC574 Datasheet PDF : 8 Pages
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t
r
t
f
CLOCK
90%
50%
10%
t
w
90%
Q 50%
10%
1/f
max
t
PLH
t
PHL
t
TLH
t
THL
Figure 3.
74HC574
SWITCHING WAVEFORMS
V
CC
GND
1.3 V
t
PZL
t
PLZ
Q
1.3 V
t
PZH
t
PHZ
Q
3.0 V
GND
HIGH
IMPEDANCE
10%
V
OL
90%
V
OH
HIGH
IMPEDANCE
Figure 4.
DATA
CLOCK
VALID
50%
t
su
t
h
50%
Figure 5.
V
CC
GND
V
CC
GND
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
C
L
*
*Includes all probe and jig capacitance.
Figure 6.
D0
2
D1
3
D2
4
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
1 k
W
C
L
*
CONNECT TO V
CC
WHEN
TESTING t
PLZ
AND t
PZL
.
CONNECT TO GND WHEN
TESTING t
PHZ
AND t
PZH
.
*Includes all probe and jig capacitance.
Figure 7. Test Circuit
D3
5
D4
6
D5
7
D6
8
D7
9
CLOCK
11
OUTPUT ENABLE
1
C
Q
D
C
Q
D
C
Q
D
CQ
D
C
Q
D
CQ
D
C
Q
D
C
Q
D
19
Q0
18
Q1
17
Q2
16
Q3
15
Q4
14
Q5
13
Q6
12
Q7
Figure 8. Expanded Logic Diagram
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