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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

DM54LS157

DM74LS157

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

’LS157 Electrical Characteristics

over recommended operating free air temperature range (unless otherwise noted)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(Note 1)

Input Clamp Voltage

b

15

V

High Level Output

DM54

25

34

V

Voltage

DM74

27

34

Low Level Output

DM54

025

04

Voltage

DM74

035

05

V

DM74

025

04

Input Current

Max

S or G

02

mA

Input Voltage

AorB

0 1

High Level Input

S or G

40

m

A

Current

AorB

20

Low Level Input

SorG

b

08

mA

Current

AorB

b

04

Short Circuit

DM54

b

20

b

100

mA

Output Current

(Note 2)

DM74

b

20

b

100

Supply Current

97

16

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

2