AC Electrical Characteristics
V
CC
e
5V, T
A
e
25
§
C, t
r
e
t
f
e
6 ns, C
L
e
45 pF
Symbol
Parameter
Conditions
Typ
Guaranteed
Limit
Units
f
MAX
Maximum Operating
Frequency
40
25
MHz
t
PHL
, t
PLH
Maximum Propagation
Delay, Clock to Q
A'
or Q
H'
Maximum Propagation
Delay, Clear to Q
A'
or Q
H'
Maximum Propagation
Delay, Clock to Q
A
±Q
H
Maximum Propagation
Delay, Clear to Q
A
±Q
H
Maximum Enable Time
25
35
ns
t
PHL
39
40
ns
t
PHL
, t
PLH
C
L
e
45 pF
25
35
ns
t
PHL
C
L
e
45 pF
28
40
ns
t
PZL
, t
PZH
C
L
e
45 pF
R
L
e
1 k
X
C
L
e
5 pF
R
L
e
1 k
X
10
35
ns
t
PHZ
, t
PLZ
Maximum Disable Time
18
25
ns
t
S
Minimum Setup
Time
Select
20
ns
Data
20
ns
t
H
Minimum Hold
Time
Select
0
ns
Data
0
ns
t
W
t
REM
Minimum Pulse Width
12
20
ns
Clear Removal Time
10
ns
AC Electrical Characteristics
C
L
e
50 pF, t
r
e
t
f
e
6 ns unless otherwise specified
T
A
e
25
§
C
74HC
54HC
Symbol
Parameter
Conditions
V
CC
T
A
eb
40 to 85
§
C
Guaranteed Limits
T
A
eb
55 to 125
§
C
Units
Typ
f
MAX
Maximum Operating Frequency
2.0V
4.5V
6.0V
5
4
3.5
18
20
MHz
MHz
MHz
25
29
20
23
t
PHL
, t
PLH
Maximum Propagation
Delay, Clock to Q
A'
or Q
H'
2.0V
4.5V
6.0V
15
27
25
170
38
35
210
48
44
240
54
49
ns
ns
ns
t
PHL
Maximum Propagation
Delay, Clear to Q
A'
or Q
H'
2.0V
4.5V
6.0V
70
30
26
200
44
38
250
55
46
280
62
52
ns
ns
ns
t
PHL
, t
PLH
Maximum Propagation
Delay, Clock to Q
A
±Q
H
C
L
e
50 pF
C
L
e
150 pF
C
L
e
50 pF
C
L
e
150 pF
C
L
e
50 pF
C
L
e
150 pF
C
L
e
50 pF
C
L
e
150 pF
C
L
e
50 pF
C
L
e
150 pF
C
L
e
50 pF
C
L
e
150 pF
2.0V
2.0V
65
100
170
206
210
260
240
295
ns
ns
4.5V
4.5V
27
34
38
46
48
57
54
66
ns
ns
6.0V
6.0V
25
31
35
39
44
49
49
55
ns
ns
t
PHL
Maximum Propagation
Delay, Clear to Q
A
±Q
H
2.0V
2.0V
70
110
200
236
250
295
280
325
ns
ns
4.5V
4.5V
30
37
44
52
55
65
62
75
ns
ns
6.0V
6.0V
26
32
38
46
46
57
52
64
ns
ns
3