74ABT821 Datasheet, PDF (2/6 Pages) NXP Semiconductors – 10-bit D-type flip-flop; positive-edge trigger 3-State

Philips Semiconductors
10-bit D-type flip-flop; positive-edge trigger
(3-State)
Product specification
74ABT821
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
2 3 4 5 6 7 8 9 10 11
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9
13
CP
1
OE
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9
23 22 21 20 19 18 17 16 15 14
1
EN
13
C2
2
2D
1
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
SA00224
FUNCTION TABLE
INPUTS
OE
CP
Dn
INTERNAL
REGISTER
OUTPUTS
Q0 – Q9
L
↑
l
L
L
L
↑
h
H
H
L
↑
X
NC
NC
H
↑
X
NC
Z
H
↑
Dn
Dn
Z
H = High voltage level
h = High voltage level one set-up time
prior to the Low-to-High clock transition
L = Low voltage level
l = Low voltage level one set-up time
prior to the Low-to-High clock transition
OPERATING MODE
Load and read register
Hold
Disable outputs
NC=
X=
Z=
↑=
↑=
No change
Don’t care
High impedance “off” state
Low to High clock transition
Not a Low-to-High clock transition
LOGIC DIAGRAM
SA00225
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
2
3
4
5
6
7
8
9
10
11
13
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
D
CP Q
D
CP Q
23
Q0
22
Q1
21
Q2
20
Q3
19
Q4
18
Q5
17
Q6
16
Q7
15
Q8
14
Q9
SA00226
1995 Sep 06
2