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.

DM74157 Recommended Operating Conditions

DM74S157 Electrical Characteristics

over recommended operating free air temperature (unless otherwise noted)

Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.

DM74S157 Switching Characteristics

Supply Voltage

7V

Input Voltage

5.5V

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

4.75

5

5.25

V

HIGH Level Input Voltage

2

V

LOW Level Input Voltage

0.8

V

HIGH Level Output Current

−1mA

LOW Level Output Current

20

mA

Free Air Operating Temperature

0

70

°C

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(Note 2)

Input Clamp Voltage

−1.2

V

HIGH Level

2.7

3.4

V

Output Voltage

LOW Level

0.5

V

Output Voltage

1

mA

HIGH Level

S or G

100

µA

Input Current

A or B

50

HIGH Level

S or G

−4

mA

Input Current

A or B

−2

Short Circuit Output Current

−40

−100

mA

Supply Current

50

78

mA

Symbol

Parameter

From (Input)

Units

To (Output)

Min

Max

Min

Max

Propagation Delay Time

Data to Y

7.5

10

ns

LOW-to-HIGH Level Output

Propagation Delay Time

Data to Y

6.5

10

ns

HIGH-to-LOW Level Output

Propagation Delay Time

Strobe to Y

12.5

15

ns

LOW-to-HIGH Level Output

Propagation Delay Time

Strobe to Y

12

15

ns

HIGH-to-LOW Level Output

Propagation Delay Time

Select to Y

15

17

ns

LOW-to-HIGH Level Output

Propagation Delay Time

Select to Y

15

17

ns

HIGH-to-LOW Level Output