74LVT574 Просмотр технического описания (PDF) - Philips Electronics
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74LVT574 Datasheet PDF : 12 Pages
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Philips Semiconductors
3.3V Octal D-type flip-flop (3-State)
Product specification
74LVT574
LOGIC SYMBOL (IEEE/IEC)
1
EN
11
C1
2
1D
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
PIN DESCRIPTION
PIN NUMBER
SYMBOL
1
OE
2, 3, 4, 5, 6, 7, 8, 9
19, 18, 17, 16, 15,
14, 13, 12
D0-D7
Q0-Q7
11
CP
10
GND
20
VCC
FUNCTION
Output enable input
(active-low)
Data inputs
Data outputs
Clock pulse input (active
rising edge)
Ground (0V)
Positive supply voltage
SV00033
FUNCTION TABLE
INPUTS
INTERNAL
OUTPUTS
OE
CP
Dn
REGISTER
Q0 – Q7
L
↑
l
L
L
L
↑
h
H
H
L
↑
X
NC
NC
H
X
X
NC
Z
H=
h=
L=
l=
NC=
X=
Z=
↑=
↑=
High voltage level
High voltage level one set-up time prior to the Low-to-High clock transition
Low voltage level
Low voltage level one set-up time prior to the Low-to-High clock transition
No change
Don’t care
High impedance “off” state
Low-to-High clock transition
not a Low-to-High clock transition
LOGIC DIAGRAM
D0
D1
D2
D3
D4
2
3
4
5
6
OPERATING
MODE
Load and read register
Hold
Disable outputs
D5
D6
D7
7
8
9
11
CP
1
OE
D
CP Q
D
CP Q
D
CP Q
D
CP Q
D
CP Q
D
CP Q
D
CP Q
D
CP Q
19
Q0
18
Q1
17
Q2
16
Q3
15
Q4
14
Q5
13
Q6
12
Q7
SV00043
1998 Feb 19
3
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