SN74LS192 datasheet(5/7 Pages) ONSEMI

5 / 7 page

SN74LS192

http://onsemi.com

AC CHARACTERISTICS (TA = 25°C)

Symbol

Parameter

Limits

Unit

Test Conditions

Min

Typ

Max

fMAX

Maximum Clock Frequency

MHz

VCC = 5.0 V

CL = 15 pF

tPLH

tPHL

CPU Input to

TCU Output

tPLH

tPHL

CPD Input to

TCD Output

tPLH

tPHL

Clock to Q

tPLH

tPHL

PL to Q

tPHL

MR Input to Any Output

AC SETUP REQUIREMENTS (TA = 25°C)

Symbol

Parameter

Limits

Unit

Test Conditions

Min

Typ

Max

Any Pulse Width

VCC = 5.0 V

Data Setup Time

Data Hold Time

5.0

trec

Recovery Time

DEFINITIONS OF TERMS

SETUP TIME (ts) is defined as the minimum time required for

the correct logic level to be present at the logic input prior to

the PL transition from LOW-to-HIGH in order to be

recognized and transferred to the outputs.

HOLD TIME (th) is defined as the minimum time following the

PL 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 PL transition

from LOW-to-HIGH and still be recognized.

RECOVERY TIME (trec) is defined as the minimum time

required between the end of the reset pulse and the clock

transition from LOW-to-HIGH in order to recognize and

transfer HIGH data to the Q outputs.

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