If MilitaryAerospace specified devices are required

please contact the National Semiconductor Sales

OfficeDistributors for availability and specifications

Supply Voltage

7V

Input Voltage

7V

Operating Free Air Temperature Range

DM54LS and 54LS

b

DM74LS

Storage Temperature Range

b

Note

The ‘‘Absolute Maximum Ratings’’ are those values

beyond which the safety of the device cannot be guaran-

teed The device should not be operated at these limits The

parametric values defined in the ‘‘Electrical Characteristics’’

table are not guaranteed at the absolute maximum ratings

The ‘‘Recommended Operating Conditions’’ table will define

the conditions for actual device operation

Recommended Operating Conditions

Symbol

Parameter

DM54LS253

DM74LS253

Units

Min

Nom

Max

Min

Nom

Max

Supply Voltage

45

5

55

475

5

525

V

High Level Input Voltage

2

2

V

Low Level Input Voltage

07

08

V

High Level Output Current

b

1

b

26

mA

Low Level Output Current

12

24

mA

Free Air Operating Temperature

b

55

125

0

70

C

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(Note 1)

Input Clamp Voltage

b

15

V

High Level Output

DM54

24

34

V

Voltage

DM74

24

31

Low Level Output

DM54

04

Voltage

DM74

05

V

DM74

04

Input Current

Max

01

mA

Input Voltage

High Level Input Current

20

m

A

Low Level Input Current

b

04

mA

Off-State Output Current

with High Level Output

20

m

A

Voltage Applied

Off-State Output Current

with Low Level Output

b

20

m

A

Voltage Applied

Short Circuit

DM54

b

20

b

100

mA

Output Current

(Note 2)

DM74

b

20

b

100

Supply Current

7

12

mA

Supply Current

85

14

mA

Note 1

Note 2

Not more than one output should be shorted at a time and the duration should not exceed one second

Note 3

Note 4

2