CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
3.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
DC Electrical Specifications
TEST
CONDITIONS
PARAMETER
HC TYPES
High Level Input
Voltage
V
IH
-
-
2
4.5
6
Low Level Input
Voltage
V
IL
-
-
2
4.5
6
High Level Output
Voltage
CMOS Loads
High Level Output
Voltage
TTL Loads
Low Level Output
Voltage
CMOS Loads
Low Level Output
Voltage
TTL Loads
Input Leakage
Current
Quiescent Device
Current
I
I
I
CC
V
CC
or
GND
V
CC
or
GND
V
OL
V
IH
or V
IL
V
OH
V
IH
or V
IL
-0.02
-0.02
-0.02
-
-4
-5.2
0.02
0.02
0.02
-
4
5.2
-
0
2
4.5
6
-
4.5
6
2
4.5
6
-
4.5
6
6
6
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
-
3.98
5.48
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.5
1.35
1.8
-
-
-
-
-
-
0.1
0.1
0.1
-
0.26
0.26
±0.1
8
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
-
3.84
5.34
-
-
-
-
-
-
-
-
-
-
-
0.5
1.35
1.8
-
-
-
-
-
-
0.1
0.1
0.1
-
0.33
0.33
±1
80
1.5
3.15
4.2
-
-
-
1.9
4.4
5.9
-
3.7
5.2
-
-
-
-
-
-
-
-
-
-
-
0.5
1.35
1.8
-
-
-
-
-
-
0.1
0.1
0.1
-
0.4
0.4
±1
160
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
µA
µA
SYMBOL
V
I
(V)
I
O
(mA)
V
CC
(V)
25
o
C
MIN
TYP
MAX
-40
o
C TO 85
o
C -55
o
C TO 125
o
C
MIN
MAX
MIN
MAX
UNITS
3
CD74HC123, CD74HCT123, CD74HC423, CD74HCT423
DC Electrical Specifications
(Continued)
TEST
CONDITIONS
PARAMETER
HCT TYPES
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
CMOS Loads
High Level Output
Voltage
TTL Loads
Low Level Output
Voltage
CMOS Loads
Low Level Output
Voltage
TTL Loads
Input Leakage
Current
Quiescent Device
Current
Additional Quiescent
Device Current Per
Input Pin: 1 Unit Load
I
I
I
CC
∆I
CC
V
CC
and
GND
V
CC
or
GND
V
CC
-2.1
V
OL
V
IH
or V
IL
V
IH
V
IL
V
OH
-
-
V
IH
or V
IL
-
-
-0.02
4.5 to
5.5
4.5 to
5.5
4.5
2
-
4.4
-
-
-
-
0.8
-
2
-
4.4
-
0.8
-
2
-
4.4
-
0.8
-
V
V
V
SYMBOL
V
I
(V)
I
O
(mA)
25
o
C
MIN
TYP
MAX
-40
o
C TO 85
o
C -55
o
C TO 125
o
C
MIN
MAX
MIN
MAX
UNITS
V
CC
(V)
-4
4.5
3.98
-
-
3.84
-
3.7
-
V
0.02
4.5
-
-
0.1
-
0.1
-
0.1
V
4
4.5
-
-
0.26
-
0.33
-
0.4
V
0
0
-
5.5
5.5
4.5 to
5.5
-
-
-
-
100
±0.1
8
360
-
-
-
±1
80
450
-
-
-
±1
160
490
µA
µA
µA
NOTE: For dual-supply systems theoretical worst case (V
I
= 2.4V, V
CC
= 5.5V) specification is 1.8mA.
HCT Input Loading Table
INPUT
All
UNIT LOADS
0.35
NOTE: Unit Load is
∆I
CC
limit specified in DC Electrical Table, e.g.
360µA max at 25
o
C.
Prerequisite for Switching Specifications
25
o
C
PARAMETER
HC TYPES
Minimum Input,
Pulse Width
A
t
WL
2
4.5
6
B
t
WH
2
4.5
6
100
20
17
100
20
17
-
-
-
-
-
-
-
-
-
-
-
-
125
25
21
125
25
21
-
-
-
-
-
-
-
-
-
-
-
-
150
30
26
150
30
26
-
-
-
-
-
-
-
-
-
-
-
-
ns
ns
ns
ns
ns
ns
SYMBOL
V
CC
(V)
MIN
TYP
MAX
-40
o
C TO 85
o
C
MIN
TYP
MAX
-55
o
C TO 125
o
C
MIN
TYP
MAX
UNITS
4
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.
