74ABT821 PHILIPS [NXP Semiconductors], 74ABT821 Datasheet - Page 2

• Manufacturer Part Number: 74ABT821
• Description: 10-bit D-type flip-flop; positive-edge trigger 3-State
• Manufacturer: PHILIPS [NXP Semiconductors]

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