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參數(shù)資料
| 型號(hào)： | HD74HC91 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 8-Bit Universal Shift/Storage Registers With Synchronous Clear And 3-ST Outputs 20-CDIP -55 to 125 |
| 中文描述： | 8位的移位寄存器 |
| 文件頁(yè)數(shù)： | 4/9頁(yè) |
| 文件大小： | 49K |
| 代理商： | HD74HC91 |
HD74HC91
4
AC Characteristics
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25
°
C
Ta = –40 to
+85
°
C
Item
Symbol
V
CC
(V)
2.0
Min Typ Max Min
Max
Unit
Test Conditions
Maximum clock
f
max
—
—
5
—
4
MHz
frequency
4.5
—
—
25
—
20
6.0
—
—
29
—
24
Propagation delay t
PLH
time
2.0
—
—
210 —
265
ns
4.5
—
21
42
—
53
6.0
—
—
36
—
45
t
PHL
2.0
—
—
210 —
265
ns
4.5
—
21
42
—
53
6.0
—
—
36
—
45
Pulse width
t
w
2.0
125 —
—
156
—
ns
Clock
4.5
25
9
—
31
—
6.0
21
—
—
26
—
Set up time
t
su
2.0
125 —
—
156
—
ns
4.5
25
1
—
31
—
6.0
21
—
—
26
—
Hold time
t
h
2.0
5
—
—
5
—
ns
4.5
5
–1
—
5
—
6.0
5
—
—
5
—
Output rise/fall
t
TLH
t
THL
2.0
—
—
75
—
95
ns
time
4.5
—
5
15
—
19
6.0
—
—
13
—
16
Input capacitance
Cin
—
—
5
10
—
10
pF
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