3

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Note 1: The “Absolute Maximum Ratings” are those values beyond which

the safety of the device cannot be guaranteed. The device should not be

operated at these limits. The parametric values defined in the Electrical

Characteristics tables are not guaranteed at the absolute maximum ratings.

The “Recommended Operating Conditions” table will define the conditions

for actual device operation.

Recommended Operating Conditions

Electrical Characteristics

Switching Characteristics

over recommended operating free air temperature range.

Supply Voltage

7V

Input Voltage

7V

Operating Free Air Temperature Range

0

°C to +70°C

Storage Temperature Range

−65°C to +150°C

Symbol

Parameter

Min

Nom

Max

Units

Supply Voltage

4.5

5

5.5

V

HIGH Level Input Voltage

2

V

LOW Level Input Voltage

0.8

V

HIGH Level Output Current

−0.4

mA

LOW Level Output Current

8

mA

Free Air Operating Temperature

0

70

°C

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Input Clamp Voltage

−1.2

V

HIGH Level Output Voltage

LOW Level

0.25

0.4

V

Output Voltage

0.35

0.5

V

Input Current @ Maximum

0.1

mA

Input Voltage

HIGH Level Input Current

20

µA

LOW Level Input Current

−0.1

mA

Output Drive Current

−30

−112

mA

Supply Current

DM74ALS157

6

11

mA

All Inputs

= 4.5V

DM74ALS158

5

10

mA

Symbol

Parameter

From (Input)

Conditions

DM74ALS157

DM74ALS158

Units

To (Output)

Min

Max

Min

Max

Propagation Delay Time

Data to Y

3

14

3

15

ns

LOW-to-HIGH Level Output

Propagation Delay Time

2

121

8ns

HIGH-to-LOW Level Output

Propagation Delay Time

Strobe to Y

6

20

5

18

ns

LOW-to-HIGH Level Output

Propagation Delay Time

4

13

5

18

ns

HIGH-to-LOW Level Output

Propagation Delay Time

Select to Y

7

24

5

19

ns

LOW-to-HIGH Level Output

Propagation Delay Time

4

14

5

18

ns

HIGH-to-LOW Level Output