MC74HCT574A Datasheet, PDF (5/8 Pages) ON Semiconductor – Octal 3-State Noninverting D Flip-Flop with LSTTL-Compatible Inputs

MC74HCT574A
EXPANDED LOGIC DIAGRAM
D0
D1
D2
D3
D4
D5
D6
D7
2
3
4
5
6
7
8
9
CLOCK ¹¹
ENABLE 1
OUTPUT
CD
Q
CD
Q
CD
Q
CD
Q
CD
Q
CD
Q
CD
Q
CD
Q
19
18
17
16
15
14
13
12
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
tr
tf
CLOCK
2.7 V
1.3 V
0.3 V
tw
90%
Q 1.3 V
10%
1/fmax
tPLH
tPHL
tTLH
tTHL
Figure 1.
DATA
CLOCK
VALID
1.3 V
tsu
th
1.3 V
Figure 3.
SWITCHING WAVEFORMS
3.0 V
GND
3.0 V
GND
3.0 V
GND
OUTPUT
ENABLE
Q
Q
1.3 V
tPZL tPLZ
1.3 V
10%
tPZH tPHZ
90%
1.3 V
Figure 2.
TEST POINT
3.0 V
GND
HIGH
IMPEDANCE
VOL
VOH
HIGH
IMPEDANCE
OUTPUT
DEVICE
UNDER
TEST
CL*
*Includes all probe and jig capacitance
Figure 4. Test Circuit
DEVICE
UNDER
TEST
TEST POINT
OUTPUT
1 kΩ
CL*
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ AND tPZH.
*Includes all probe and jig capacitance
Figure 5. Test Circuit
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