CD74HC123, CD74HCT123, CD74HC423, CD74HCT423
Prerequisite for Switching Specifications
(Continued)
25
o
C
PARAMETER
R
SYMBOL
t
WL
V
CC
(V)
2
4.5
6
A and B Hold Time
t
H
2
4.5
6
Reset Removal Time
t
REM
2
4.5
6
Retrigger Time Number
R
X
= 10KΩ, C
X
= 0
Output Pulse Width
Q or Q
R
X
= 10KΩ, C
X
= 10nF
HCT TYPES
Minimum Input,
Pulse Width
A
B
R
A and B Hold Time
Reset Removal Time
Retrigger Time Number
(Note 4)
R
X
= 10KΩ, C
X
= 0
Output Pulse Width Q or Q
R
X
= 10KΩ, C
X
= 10nF
NOTE:
4. Time to trigger depends on the values of R
X
and C
X
. The output pulse width can only be extended when the time between the active-
going edges of the trigger input pulses meet the minimum retrigger time requirement.
t
rT
t
W
5
5
-
40
50
-
-
50
-
38.7
63
-
-
51.3
-
38.2
76
-
-
51.8
ns
µs
t
WH
t
WL
t
H
t
REM
5
5
-
t
WL
5
20
20
20
10
10
-
-
-
-
-
-
-
-
-
-
25
25
25
13
13
-
-
-
-
-
-
-
-
-
-
30
30
30
15
15
-
-
-
-
-
-
-
-
-
ns
ns
ns
ns
ns
40
-
50
38.7
-
51.3
38.2
-
51.8
µs
t
W
5
t
rT
5
MIN
100
20
17
50
10
9
50
10
9
-
-
TYP
-
-
-
-
-
-
-
-
-
-
50
MAX
-
-
-
-
-
-
-
-
-
-
-
-40
o
C TO 85
o
C
MIN
125
25
21
65
13
11
65
13
11
-
-
TYP
-
-
-
-
-
-
-
-
-
-
63
MAX
-
-
-
-
-
-
-
-
-
-
-
-55
o
C TO 125
o
C
MIN
150
30
26
75
15
13
75
15
13
-
-
TYP
-
-
-
-
-
-
-
-
-
-
76
MAX
150
30
26
75
15
13
75
15
13
-
-
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5
HARRIS [ HARRIS CORPORATION ]
