Absolute Maximum Ratings
(Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage (V
CC
)
DC Input Diode Current (I
K
)
V
I
e b
0 5V
V
I
e
V
CC
a
0 5V
DC Input Voltage (V
I
)
DC Output Diode Current (I
OK
)
V
O
e b
0 5V
V
O
e
V
CC
a
0 5V
DC Output Voltage (V
O
)
DC Output Source
or Sink Current (I
O
)
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
Storage Temperature (T
STG
)
Junction Temperature (T
J
)
CDIP
PDIP
b
0 5V to
a
7 0V
b
20 mA
a
20 mA
b
0 5V to V
CC
a
0 5V
b
20 mA
a
20 mA
b
0 5V to V
CC
a
0 5V
g
50 mA
g
50 mA
Recommended Operating
Conditions
Supply Voltage (V
CC
)
’AC
’ACT
Input Voltage (V
I
)
Output Voltage (V
O
)
Operating Temperature (T
A
)
74AC ACT
54AC ACT
Minimum Input Edge Rate (DV
Dt)
’AC Devices
V
IN
from 30% to 70% of V
CC
V
CC
3 3V 4 5V 5 5V
Minimum Input Edge Rate (DV
Dt)
’ACT Devices
V
IN
from 0 8V to 2 0V
V
CC
4 5V 5 5V
2 0V to 6 0V
4 5V to 5 5V
0V to V
CC
0V to V
CC
b
40 C to
a
85 C
b
55 C to
a
125 C
125 mV ns
b
65 C to
a
150 C
125 mV ns
175 C
140 C
Note 1
Absolute maximum ratings are those values beyond which damage
to the device may occur The databook specifications should be met without
exception to ensure that the system design is reliable over its power supply
temperature and output input loading variables National does not recom-
mend operation of FACT
TM
circuits outside databook specifications
DC Characteristics for ’AC Family Devices
74AC
Symbol
Parameter
V
CC
(V)
T
A
e a
25 C
Typ
V
IH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
30
45
55
30
45
55
30
45
55
30
45
55
V
OL
Maximum Low Level
Output Voltage
30
45
55
30
45
55
I
IN
Maximum Input
Leakage Current
55
0 002
0 001
0 001
15
2 25
2 75
15
2 25
2 75
2 99
4 49
5 49
21
3 15
3 85
09
1 35
1 65
29
44
54
2 56
3 86
4 86
01
01
01
0 36
0 36
0 36
g
0 1
54AC
T
A
e
b
55 C to
a
125 C
74AC
T
A
e
b
40 C to
a
85 C
Units
Conditions
Guaranteed Limits
21
3 15
3 85
09
1 35
1 65
29
44
54
24
37
47
01
01
01
0 50
0 50
0 50
g
1 0
21
3 15
3 85
09
1 35
1 65
29
44
54
2 46
3 76
4 76
01
01
01
0 44
0 44
0 44
g
1 0
V
V
OUT
e
0 1V
or V
CC
b
0 1V
V
OUT
e
0 1V
or V
CC
b
0 1V
I
OUT
e b
50
mA
V
IL
V
V
OH
V
V
IN
e
V
IL
or V
IH
b
12 mA
b
24 mA
I
OH
b
24 mA
I
OUT
e
50
mA
V
V
IN
e
V
IL
or V
IH
12 mA
I
OL
24 mA
24 mA
V
I
e
V
CC
GND
V
V
mA
All outputs loaded thresholds on input associated with output under test
2
NSC [ NATIONAL SEMICONDUCTOR ]
