參數(shù)資料
型號(hào): HD74HC78
廠商: Hitachi,Ltd.
英文描述: Dual J-K Flip-Flops (with Preset, Common Clear and Common Clock)
中文描述: 雙JK觸發(fā)器(帶預(yù)置,共同明確和共同的時(shí)鐘)
文件頁(yè)數(shù): 5/10頁(yè)
文件大?。?/td> 59K
代理商: HD74HC78
HD74HC78
5
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
6
5
MHz
frequency
4.5
30
24
6.0
35
28
Propagation delay t
PLH
time
2.0
150 —
190
ns
Clock to Q or
Q
t
PHL
4.5
20
30
38
6.0
26
33
2.0
140 —
175
Clear to Q or
Q
4.5
18
28
35
6.0
24
30
2.0
140 —
175
Preset to Q or
Q
4.5
18
28
35
6.0
24
30
Pulse width
t
w
2.0
80
100
ns
Clock, Preset, Clear
4.5
16
8
20
6.0
14
17
Setup time
t
su
2.0
100 —
125
ns
J or K to Clock
4.5
20
2
25
6.0
17
21
Hold time
t
h
2.0
5
5
ns
Clock to J or K
4.5
5
–1
5
6.0
5
5
Removal time
t
rem
2.0
100 —
125
ns
Preset or Clear to Clock
4.5
20
0
25
6.0
17
21
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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