DM54LS251 datasheet(3/6 Pages) NSC

3 / 6 page

Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)

From (Input)

RL e 667X

Symbol

Parameter

to (Output)

CL e 45 pF

CL e 150 pF

Units

Min

Max

Min

Max

tPLH

Propagation Delay Time

A B C

Low to High Level Output

(4 Levels) to Y

tPHL

Propagation Delay Time

A B C

High to Low Level Output

(4 Levels) to Y

tPLH

Propagation Delay Time

A B C

Low to High Level Output

(3 Levels) to W

tPHL

Propagation Delay Time

A B C

High to Low Level Output

(3 Levels) to W

tPLH

Propagation Delay Time

Low to High Level Output

to Y

tPHL

Propagation Delay Time

High to Low Level Output

to Y

tPLH

Propagation Delay Time

Low to High Level Output

to W

tPHL

Propagation Delay Time

High to Low Level Output

to W

tPZH

Output Enable Time to

Strobe

High Level Output

to Y

tPZL

Output Enable Time to

Strobe

Low Level Output

to Y

tPHZ

Output Disable Time from

Strobe

High Level Output (Note 1)

to Y

tPLZ

Output Disable Time from

Strobe

Low Level Output (Note 1)

to Y

tPZH

Output Enable Time to

Strobe

High Level Output

to W

tPZL

Output Enable Time to

Strobe

Low Level Output

to W

tPHZ

Output Disable Time from

Strobe

High Level Output (Note 1)

to W

tPLZ

Output Disable Time from

Strobe

Low Level Output (Note 1)

to W

Note 1

CL e 5pF

Logic Diagram

TLF6415 – 2

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