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Supply Voltage

7V

Input Voltage

7V

Operating Free Air Temperature Range

DM54LS

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

DM54LS55

DM74LS55

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

04

b

04

mA

Low Level Output Current

4

8

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 Voltage

DM54

25

V

DM74

27

Low Level Output Voltage

DM54

04

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

Short Circuit

DM54

b

20

b

100

mA

Output Current

(Note 2)

DM74

b

20

b

100

Supply Current with Outputs High

08

mA

Supply Current with Outputs Low

13

mA

Note 1

Note 2

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

Symbol

Parameter

Units

Min

Max

Propagation Delay Time

15

ns

15

2