Absolute Maximum Ratings (Note)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Supply Voltage

7V

Input Voltage

7V

Operating Free Air Temperature Range

b55§C to a125§C

54LS

DM74LS

0§C to a70§C

Storage Temperature Range

b65§C to a150§C

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

 

54LS14

 

 

DM74LS14

 

Units

 

 

 

 

 

 

 

 

 

Min

Nom

Max

Min

Nom

 

Max

 

 

 

 

 

 

 

 

 

 

 

VCC

Supply Voltage

4.5

5

5.5

4.75

5

 

5.25

V

VTa

Positive-Going Input

1.5

1.6

2.0

1.4

1.6

 

1.9

V

 

Threshold Voltage (Note 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VTb

Negative-Going Input

0.6

0.8

1.1

0.5

0.8

 

1

V

 

Threshold Voltage (Note 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HYS

Input Hysteresis (Note 1)

0.4

0.8

 

0.4

0.8

 

 

V

 

 

 

 

 

 

 

 

 

 

IOH

High Level Output Current

 

 

b0.4

 

 

 

b0.4

mA

IOL

Low Level Output Current

 

 

4

 

 

 

8

mA

TA

Free Air Operating Temperature

b55

 

125

0

 

 

70

§C

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

Symbol

Parameter

Conditions

 

Min

Typ

Max

Units

 

(Note 2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VI

Input Clamp Voltage

VCC e Min, II e b18 mA

 

 

 

b1.5

V

VOH

High Level Output

VCC e Min, IOH e Max

54LS

2.5

3.4

 

V

 

Voltage

VIL e Max

DM74

2.7

3.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOL

Low Level Output

VCC e Min, IOL e Max

54LS

 

0.25

0.4

 

 

Voltage

VIH e Min

DM74

 

0.35

0.5

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VCC e Min, IOL e 4 mA

DM74

 

0.25

0.4

 

ITa

Input Current at

VCC e 5V, VI e VTa

DM74

 

b0.14

 

mA

 

Positive-Going Threshold

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ITb

Input Current at

VCC e 5V, VI e VTb

DM74

 

b0.18

 

mA

 

Negative-Going Threshold

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

II

Input Current @ Max

VCC e Max, VI e 7V

DM74

 

 

0.1

mA

 

Input Voltage

VCC e Max, VI e 10.0V

54LS

 

 

 

 

 

 

 

 

 

 

 

 

 

IIH

High Level Input Current

VCC e Max, VI e 2.7V

 

 

 

20

mA

IIL

Low Level Input Current

VCC e Max, VI e 0.4V

 

 

 

b0.4

mA

IOS

Short Circuit

VCC e Max

54LS

b20

 

b100

mA

 

Output Current

(Note 3)

DM74

b20

 

b100

 

 

 

 

 

 

 

 

ICCH

Supply Current with

VCC e Max

 

 

8.6

16

mA

 

Outputs High

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ICCL

Supply Current with

VCC e Max

 

 

12

21

mA

 

Outputs Low

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note 1: VCC e 5V.

 

 

 

 

 

 

Note 2: All typicals are at VCC e 5V, TA e 25§C.

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

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National Products Inverter manual Absolute Maximum Ratings Note, Recommended Operating Conditions, DM74LS, Hys