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參數(shù)資料
| 型號(hào)： | HD74HC299 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 8-bit Universal Shift/Storage Register (with 3-state outputs) |
| 中文描述： | 8位通用移位/存儲(chǔ)寄存器（3態(tài)輸出） |
| 文件頁(yè)數(shù)： | 6/11頁(yè) |
| 文件大?。?/td> | 81K |
| 代理商： | HD74HC299 |
HD74HC299
6
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
—
23
Propagation delay t
PLH
time
2.0
—
—
190 —
240
ns
Clock to Q
A
’ or Q
H
’
t
PHL
4.5
—
—
38
—
48
6.0
—
—
32
—
41
t
PHL
2.0
—
—
220 —
275
ns
Clear to Q
A
’ or Q
H
’
4.5
—
—
44
—
55
6.0
—
—
37
—
47
t
PLH
t
PHL
2.0
—
—
190 —
240
ns
Clock to Q
A
– Q
H
4.5
—
—
38
—
48
6.0
—
—
32
—
41
t
PHL
2.0
—
—
220 —
275
ns
Clear to Q
A
– Q
H
4.5
—
—
44
—
55
6.0
—
—
37
—
47
Output enable
t
ZH
t
ZL
2.0
—
—
160 —
200
ns
time
4.5
—
—
32
—
40
6.0
—
—
27
—
34
Output disable
t
HZ
t
LZ
2.0
—
—
160 —
200
ns
time
4.5
—
—
32
—
40
6.0
—
—
27
—
34
Setup time
t
su
2.0
100 —
—
125
—
ns
Select
4.5
20
—
—
25
—
6.0
17
—
—
21
—
Hold time
t
h
2.0
5
—
—
5
—
ns
Select
4.5
5
—
—
5
—
6.0
5
—
—
5
—
Removal time
t
rem
2.0
50
—
—
65
—
ns
Clear
4.5
10
—
—
13
—
6.0
9
—
—
11
—
Pulse width
t
w
2.0
80
—
—
100
—
ns
4.5
16
—
—
20
—
6.0
14
—
—
17
—
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