MM74HC191N datasheet(3/8 Pages) NSC

Part #	MM74HC191N

Description	MM54HC190/MM74HC190 Synchronous Decade Up/Down Counters with Mode Control MM54HC191/MM74HC191 Synchronous Binary Up/Down Counters with Mode Control

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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AC Electrical Characteristics TAe25 C VCCe50V tretfe6 ns CLe15 pF (unless otherwise specified)

Symbol

Parameter

From

To

Typ

Units

(Input)

(Output)

fMAX

Maximum Clock

MHz

Frequency

tPLH tPHL

Maximum Propagation Delay Time

Load

QA QB

ns

QC QD

tPLH tPHL

Maximum Propagation Delay Time

Data A

QA QB

ns

B C D

QC QD

tPLH tPHL

Maximum Propagation Delay Time

Clock

Ripple

ns

Clock

tPLH tPHL

Maximum Propagation Delay Time

Clock

QA QB

ns

QC QD

tPLH tPHL

Maximum Propagation Delay Time

Clock

MaxMin

ns

tPLH tPHL

Maximum Propagation Delay Time

DownUp

Ripple

ns

Clock

tPLH tPHL

Maximum Propagation Delay Time

DownUp

MaxMin

ns

tPHL tPLH

Maximum Propagation Delay Time

Enable

Ripple Clock

ns

tW

Minimum Clock Clear or Load

ns

Input Pulse Width

AC Electrical Characteristics VCCe20V to 60V CLe50 pF tretfe6 ns (unless otherwise specified)

From

To

TAe25 C

74HC

54HC

Symbol

Parameter

(Input)

(Output)

VCC

TAeb40 to 85 CTAeb55 to 125 C

Units

Typ

Guaranteed Limits

fMAX

Maximum Clock

V

MHz

Frequency

V

MHz

V

MHz

tPLH tPHL

Maximum Propagation

Load

QA QB

V

ns

Delay Time

QC QD

V

ns

V

ns

tPLH tPHL

Maximum Propagation

Data A

QA QB

V

ns

Delay Time

B C D

QC QD

V

ns

V

ns

tPLH tPHL

Maximum Propagation

Clock

Ripple

V

ns

Delay Time

Clock

V

ns

V

ns

tPLH tPHL

Maximum Propagation

Clock

QA QB

V

ns

Delay Time

QC QD

V

ns

V

ns

3

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Manufacturer	Part #	Datasheet	Description
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MM74HC191N Datasheet(PDF) 3 Page - National Semiconductor (TI)

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Similar Part No. - MM74HC191N

Similar Description - MM74HC191N

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