參數(shù)資料
型號(hào): HD74HC74
廠商: Hitachi,Ltd.
英文描述: Dual D-type Flip-Flops (with Preset and Clear)
中文描述: 雙D型觸發(fā)器(帶預(yù)置和清除)
文件頁(yè)數(shù): 4/9頁(yè)
文件大小: 58K
代理商: HD74HC74
HD74HC74
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
35
25
20
6.0
29
24
Propagation delay t
PLH
time
2.0
160 —
200
ns
Clock to Q or
Q
t
PHL
4.5
14
32
40
6.0
27
34
2.0
160 —
200
Preset or Clear to Q or
Q
4.5
13
32
40
6.0
27
34
Setup time
t
su
2.0
100 —
125
ns
Data to Clock
4.5
20
1
25
6.0
17
21
Hold time
t
h
2.0
5
5
ns
Clock to Data
4.5
5
0
5
6.0
5
5
Removal time
t
rem
2.0
25
31
ns
Preset, Clear to Clock
4.5
5
–5
6
6.0
4
5
Pulse width
t
w
2.0
80
100
ns
Clock, Preset, Clear
4.5
16
8
20
6.0
14
17
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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參數(shù)描述
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