hef4021b NXP Semiconductors, hef4021b Datasheet - Page 4

• Manufacturer Part Number: hef4021b
• Description: 8-bit Static Shift Register
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FUNCTION TABLES
Serial operation
AC CHARACTERISTICS
V
January 1995
Propagation delays
Output transition
SS
8-bit static shift register
n
1
2
3
6
7
8
= 0 V; T
CP
PL
times
HIGH to LOW
LOW to HIGH
HIGH to LOW
LOW to HIGH
HIGH to LOW
LOW to HIGH
CP
O
O
amb
n
n
= 25 C; C
INPUTS
D
D
D
D
X
X
X
X
S
1
2
3
L
V
= 50 pF; input transition times
PL
V
L
L
L
L
L
L
L
DD
10
15
10
15
10
15
10
15
10
15
10
15
5
5
5
5
5
5
t
t
t
t
t
t
SYMBOL
PHL
PLH
PHL
PLH
THL
TLH
O
D
D
D
X
X
X
5
1
2
3
OUTPUTS
no change
O
D
D
X
X
X
X
1
2
6
MIN.
O
D
X
X
X
X
X
7
1
TYP.
4
125
120
105
115
20 ns
55
40
50
40
55
40
50
40
60
30
20
60
30
20
Parallel operation
Notes
1. H = HIGH state (the more positive voltage)
n
L = LOW state (the less positive voltage)
X = state is immaterial
D
n = number of clock pulse transitions
n
= either HIGH or LOW
= positive-going transition
= negative-going transition
MAX.
250
230
100
240
210
100
120
120
110
110
CP
80
80
80
80
60
40
60
40
X
INPUTS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
D
X
S
TYPICAL EXTRAPOLATION
PL
H
98 ns
44 ns
32 ns
88 ns
39 ns
32 ns
93 ns
44 ns
32 ns
78 ns
39 ns
32 ns
10 ns
10 ns
9 ns
6 ns
9 ns
6 ns
FORMULA
Product specification
O
P
HEF4021B
5
5
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(0,55 ns/pF) C
(0,23 ns/pF) C
(0,16 ns/pF) C
(1,0 ns/pF) C
(0,42 ns/pF) C
(0,28 ns/pF) C
(1,0 ns/pF) C
(0,42 ns/pF) C
(0,28 ns/pF) C
OUTPUTS
O
P
6
6
MSI
O
P
L
L
7
7
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L