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參數(shù)資料
| 型號： | HD74HCT74A |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Octal D-Type Edge Triggered Flip-Flops with 3-State Outputs 20-CDIP -55 to 125 |
| 中文描述： | 雙D型上升沿觸發(fā)的明確和預設字拖 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 57K |
| 代理商： | HD74HCT74A |
HD74HCT74A
5
Switching Characteristics
(C
L
= 50 pF)
Item
Symbol V
CC
(V)
Ta = 25
°
C
Ta = –40 to 85
°
C
Unit Input
Output
Min
Typ
Max
Min
Max
FROM
TO
Maximum clock
f
max
4.5
27
78
—
22
—
MHz
frequency
5.5
30
92
—
24
—
Propagation
t
PLH
t
PHL
4.5
—
14
28
—
35
ns
PRE
,
CLR
Q,
Q
delay time
5.5
—
12
25
—
32
4.5
—
14
22
—
28
CLK
Q,
Q
5.5
—
13
20
—
25
Output rise / fall
t
r
/ t
f
4.5
—
7
15
—
19
ns
Each
time
5.5
—
6
13
—
16
output
Setup time
t
su
4.5
10
—
—
13
—
ns
D
5.5
9
—
—
12
—
4.5
5
—
—
5
—
PRE
,
CLR
5.5
5
—
—
5
—
inactive
Hold time
t
h
4.5
0
—
—
0
—
ns
5.5
0
—
—
0
—
Pulse width
t
w
4.5
15
—
—
19
—
ns
5.5
14
—
—
17
—
Input capacitance
C
I
C
PD
—
—
3
10
—
10
pF
Power dissipation
capacitance
—
—
35
—
—
—
pF
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