54LS169 datasheet(3/8 Pages) NSC

3 / 8 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 2kX

Symbol

Parameter

To (Output)

CL e 15 pF

CL e 50 pF

Units

Min

Max

Min

Max

fMAX

Maximum Clock

MHz

Frequency

tPLH

Propagation Delay Time

Clock to

Low to High Level Output

Ripple Carry

tPHL

Propagation Delay Time

Clock to

High to Low Level Output

Ripple Carry

tPLH

Propagation Delay Time

Clock to

Low to High Level Output

Any Q

tPHL

Propagation Delay Time

Clock to

High to Low Level Output

Any Q

tPLH

Propagation Delay Time

Enable T to

Low to High Level Output

Ripple Carry

tPHL

Propagation Delay Time

Enable T to

High to Low Level Output

Ripple Carry

tPLH

Propagation Delay Time

UpDown to

Low to High Level Output

Ripple Carry (Note 1)

tPHL

Propagation Delay Time

UpDown to

High to Low Level Output

Ripple Carry (Note 1)

Note 1

The propagation delay from UPDOWN to RIPPLE CARRY must be measured with the counter at either a minimum or a maximum count As the logic level

of the updown input is changed the ripple carry output will follow If the count is minimum the ripple carry output transition will be in phase If the count is

maximum the ripple carry output will be out of phase

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