DM74LS298M 查看數據表（PDF） - Fairchild Semiconductor

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DM74LS298M

Quad 2-Port Register Multiplexer with Storage

Fairchild Semiconductor 

Absolute Maximum Ratings (Note 1)

Supply Voltage

7V

Input Voltage

7V

Operating Free Air Temperature Range

DM54LS

DM74LS

Storage Temperature Range

−55˚C to +125˚C

0˚C to +70˚C

−65˚C to +150˚C

Recommended Operating Conditions

Symbol

Parameter

DM54LS298

DM74LS298

Units

Min

Nom

Max

Min

Nom

Max

VCC

Supply Voltage

4.5

5

5.5

4.75

5

5.25

V

VIH

High Level Input Voltage

2

2

V

VIL

Low Level Input Voltage

0.7

0.8

V

IOH

High Level Output Current

−0.4

−0.4

mA

IOL

Low Level Output Current

4

8

mA

TA

Free Air Operating Temperature

−55

125

0

70

˚C

ts (H)

Setup Time HIGH or LOW

25

25

ns

ts (L)

S to CP

25

25

th (H)

Hold Time HIGH or LOW

0

0

ns

th (L)

S to CP

0

0

ts (H)

Setup Time HIGH or LOW

15

15

ns

ts (L)

I0x or I1x to CP

15

15

th (H)

Hold Time HIGH or LOW

5.0

5.0

ns

th (L)

I0x or I1x to CP

5.0

5.0

tw (H)

CP Pulse Width HIGH or LOW

20

20

ns

tw (L)

20

20

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” table are not guaranteed at the absolute maximum ratings. The “Recommended Operating

Conditions” table will define the conditions for actual device operation.

Electrical Characteristics

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

Symbol

Parameter

Conditions

Min

VI

Input Clamp Voltage

VCC = Min, II = −18 mA

VOH

High Level Output

VCC = Min, IOH = Max,

DM54

2.5

Voltage

VIL = Max

DM74

2.7

VOL

Low Level Output

VCC = Min, IOL = Max,

DM54

Voltage

VIH = Min

DM74

IOL = 4 mA, VCC = Min

DM74

II

Input Current @ Max

VCC = Max, VI = 7V

DM74

Input Voltage

VI = 10V

DM54

IIH

High Level Input Current

VCC = Max, VI = 2.7V

IIL

Low Level Input Current

VCC = Max, VI = 0.4V

IOS

Short Circuit

VCC = Max

DM54 −20

Output Current

(Note 3)

DM74 −20

ICC

Supply Current

VCC = Max, I0n, I1n,

S = GND, CP = M

Note 2: All typicals are at VCC = 5V, TA = 25˚C.

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

Typ

(Note 2)

3.4

0.35

0.25

Max

−1.5

0.4

0.5

0.4

0.1

20

−0.4

−100

−100

21

Units

V

V

V

mA

µA

mA

mA

mA

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