DM74AS257SJX Просмотр технического описания (PDF) - Fairchild Semiconductor

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DM74AS257SJX

3-STATE Quad 1 of 2 Line Data Selector/Multiplexers

Fairchild Semiconductor 

DM74AS257 Switching Characteristics

over recommended operating free air temperature range

Symbol

Parameter

From

To

Conditions

tPLH

Propagation Delay Time,

LOW-to-HIGH Level Output

tPHL

Propagation Delay Time,

HIGH-to-LOW Level Output

tPLH

Propagation Delay Time,

LOW-to-HIGH Level Output

tPHL

Propagation Delay Time,

HIGH-to-LOW Level Output

Data

Any

VCC = 4.5V to 5.5V,

Y

CL = 50 pF,

RL = 500Ω

Select

Any

Y

tPZH

Output Enable Time to

HIGH Level

tPZL

Output Enable Time to

LOW Level

OUTPUT Any

Control

Y

tPHZ

Output Disable Time,

from HIGH Level

tPLZ

Output Disable Time,

from LOW Level

OUTPUT Any

Control

Y

DM74AS258 Switching Characteristics

over recommended operating free air temperature range

Symbol

Parameter

From

To

Conditions

tPLH

Propagation Delay Time,

LOW-to-HIGH Level Output

tPHL

Propagation Delay Time,

HIGH-to-LOW Level Output

tPLH

Propagation Delay Time,

LOW-to-HIGH Level Output

tPHL

Propagation Delay Time,

HIGH-to-LOW Level Output

Data

Any

VCC = 4.5V to 5.5V,

Y

CL = 50 pF,

RL = 500Ω

Select

Any

Y

tPZH

Output Enable Time to

HIGH Level

tPZL

Output Enable Time to

LOW Level

OUTPUT Any

Control

Y

tPHZ

Output Disable Time,

from HIGH Level

tPLZ

Output Disable Time,

from LOW Level

OUTPUT Any

Control

Y

Min

Max

Units

1

5.5

ns

1

6

ns

2

11

ns

2

10

ns

2

7.5

ns

2

9.5

ns

1.5

6.5

ns

2

7

ns

Min

Max

Units

1

5

ns

1

4

ns

2

9.5

ns

2

10

ns

2

8

ns

2

10

ns

1.5

6

ns

2

6.5

ns

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