7490 datasheet(3/10 Pages) NSC

3 / 10 page

’90A Switching Characteristics

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

From (Input)

RL e 400X

Symbol

Parameter

To (Output)

CL e 15 pF

Units

Min

Max

fMAX

Maximum Clock

A to QA

MHz

Frequency

BtoQB

tPLH

Propagation Delay Time

AtoQA

Low to High Level Output

tPHL

Propagation Delay Time

AtoQA

High to Low Level Output

tPLH

Propagation Delay Time

AtoQD

Low to High Level Output

tPHL

Propagation Delay Time

AtoQD

High to Low Level Output

tPLH

Propagation Delay Time

BtoQB

Low to High Level Output

tPHL

Propagation Delay Time

BtoQB

High to Low Level Output

tPLH

Propagation Delay Time

BtoQC

Low to High Level Output

tPHL

Propagation Delay Time

BtoQC

High to Low Level Output

tPLH

Propagation Delay Time

BtoQD

Low to High Level Output

tPHL

Propagation Delay Time

BtoQD

High to Low Level Output

tPLH

Propagation Delay Time

SET-9 to

Low to High Level Output

QA QD

tPHL

Propagation Delay Time

SET-9 to

High to Low Level Output

QB QC

tPHL

Propagation Delay Time

SET-0

High to Low Level Output

Any Q

7490 Datasheet(PDF) 3 Page - National Semiconductor (TI)

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