參數(shù)資料
型號(hào): HEF4021BD
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: 8-bit static shift register
中文描述: 4000/14000/40000 SERIES, 8-BIT RIGHT PARALLEL IN SERIAL OUT SHIFT REGISTER, TRUE OUTPUT, CDIP16
封裝: CERDIP-16
文件頁(yè)數(shù): 4/6頁(yè)
文件大?。?/td> 70K
代理商: HEF4021BD
January 1995
4
Philips Semiconductors
Product specification
8-bit static shift register
HEF4021B
MSI
FUNCTION TABLES
Serial operation
INPUTS
OUTPUTS
n
CP
D
S
D
1
D
2
D
3
X
PL
O
5
X
O
6
X
O
7
X
1
L
2
L
X
X
X
3
L
X
X
X
6
L
D
1
D
2
D
3
X
X
7
X
L
D
1
D
2
X
8
X
L
D
1
X
L
no change
Parallel operation
Notes
1.
H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
= positive-going transition
= negative-going transition
D
n
= either HIGH or LOW
n = number of clock pulse transitions
INPUTS
OUTPUTS
n
CP
D
S
X
PL
O
5
P
5
O
6
P
6
O
7
P
7
X
H
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
= 25
°
C; C
L
= 50 pF; input transition times
20 ns
V
DD
V
SYMBOL
MIN.
TYP.
MAX.
TYPICAL EXTRAPOLATION
FORMULA
Propagation delays
CP
O
n
HIGH to LOW
5
125
55
40
115
50
40
120
55
40
105
50
40
60
30
20
60
30
20
250
110
80
230
100
80
240
110
80
210
100
80
120
60
40
120
60
40
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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
9 ns
6 ns
10 ns
9 ns
6 ns
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(0,55 ns/pF) C
L
(0,23 ns/pF) C
L
(0,16 ns/pF) C
L
(1,0 ns/pF) C
L
(0,42 ns/pF) C
L
(0,28 ns/pF) C
L
(1,0 ns/pF) C
L
(0,42 ns/pF) C
L
(0,28 ns/pF) C
L
10
15
5
10
15
5
10
15
5
10
15
5
10
15
5
10
15
t
PHL
LOW to HIGH
t
PLH
PL
O
n
HIGH to LOW
t
PHL
LOW to HIGH
t
PLH
Output transition
times
HIGH to LOW
t
THL
LOW to HIGH
t
TLH
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