SN74LS298

http://onsemi.com

4

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

Input HIGH Voltage

2.0

V

Guaranteed Input HIGH Voltage for

All Inputs

Input LOW Voltage

0.8

V

Guaranteed Input LOW Voltage for

All Inputs

Input Clamp Diode Voltage

– 0.65

– 1.5

V

Output HIGH Voltage

2.7

3.5

V

Output LOW Voltage

0.25

0.4

V

Output LOW Voltage

0.35

0.5

V

per Truth Table

I

Input HIGH Current

20

µA

Input HIGH Current

0.1

mA

Input LOW Current

– 0.4

mA

Short Circuit Current (Note 1)

–20

– 100

mA

Power Supply Current

21

mA

Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

Propagation Delay,

18

27

ns

PLH

gy

Clock to Output

21

32

ns

CC

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

Clock Pulse Width

20

ns

Data Setup Time

15

ns

Select Setup Time

25

ns

Data Hold Time

5.0

ns

Select Hold Time

0

DEFINITIONS OF TERMS

required for the correct logic level to be present at the logic

input prior to the clock transition from LOW to HIGH in

order to be recognized and transferred to the outputs.

following the clock transition from LOW to HIGH that the

logic level must be maintained at the input in order to ensure

continued recognition. A negative HOLD TIME indicates

that the correct logic level may be released prior to the clock

transition from LOW to HIGH and still be recognized.