74157 datasheet(2/6 Pages) NSC

No de pièce	74157

Description	Quad 2-Line to 1-Line Data Selectors/Multiplexers

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Fabricant	NSC [National Semiconductor (TI)]

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Absolute Maximum Ratings (Note)

If MilitaryAerospace specified devices are required

please contact the National Semiconductor Sales

OfficeDistributors for availability and specifications

Supply Voltage

7V

Input Voltage

55V

Operating Free Air Temperature Range

DM54 and 54

b

55 Cto a125 C

DM74

0 Cto a70 C

Storage Temperature Range

b

65 Cto 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

DM54157

DM74157

Units

Min

Nom

Max

Min

Nom

Max

VCC

Supply Voltage

45

5

55

475

5

525

V

VIH

High Level Input Voltage

2

V

VIL

Low Level Input Voltage

08

V

IOH

High Level Output Current

b

08

b

08

mA

IOL

Low Level Output Current

16

mA

TA

Free Air Operating Temperature

b

55

125

0

70

C

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

Symbol

Parameter

Conditions

Min

Typ

Max

Units

(Note 1)

VI

Input Clamp Voltage

VCC e Min II eb12 mA

b

15

V

VOH

High Level Output

VCC e Min IOH e Max

24

34

V

Voltage

VIL e Max VIH e Min

VOL

Low Level Output

VCC e Min IOL e Max

04

V

Voltage

VIH e Min VIL e Max

II

Input Current

Max

VCC e Max VI e 55V

1mA

Input Voltage

IIH

High Level Input Current

VCC e Max VI e 24V

40

m

A

IIL

Low Level Input Current

VCC e Max VI e 04V

b

16

mA

IOS

Short Circuit

VCC e Max

DM54

b

20

b

55

mA

Output Current

(Note 2)

DM74

b

18

b

55

ICC

Supply Current

VCC e Max (Note 3)

30

48

mA

Note 1

All typicals are at VCC e 5V TA e 25 C

Note 2

Not more than one output should be shorted at a time

Note 3

ICC is measured with 45V applied to all inputs and all outputs open

2

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