反相器

反相器

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2023年3月20日发(作者：专利申请文件)

DATASHEET

Productspecification

FileunderIntegratedCircuits,IC06

September1993

74HC/HCT14

HexinvertingSchmitttrigger

Foracompletedatasheet,pleasealsodownload:

•TheIC0674HC/HCT/HCU/HCMOSLogicFamilySpecifications

•TheIC0674HC/HCT/HCU/HCMOSLogicPackageInformation

•TheIC0674HC/HCT/HCU/HCMOSLogicPackageOutlines

September19932

PhilipsSemiconductorsProductspecification

HexinvertingSchmitttrigger74HC/HCT14

FEATURES

•Outputcapability:standard

•I

CC

category:SSI

GENERALDESCRIPTION

The74HC/HCT14arehigh-speedSi-gateCMOSdevicesandarepincompatiblewithlowpowerSchottkyTTL(LSTTL).

TheyarespecifiedincompliancewithJEDECstandardno.7A.

The74HC/ecapableoftransformingslowly

changinginputsignalsintosharplydefined,jitter-freeoutputsignals.

QUICKREFERENCEDATA

GND=0V;T

amb

=25°C;t

r

=t

f

=6ns

Notes

1.C

PD

isusedtodeterminethedynamicpowerdissipation(P

D

inµW):

P

D

=C

PD

×V

CC

2×f

i

+∑(C

L

×V

CC

2×f

o

)where:

f

i

=inputfrequencyinMHz

f

o

=outputfrequencyinMHz

C

L

=outputloadcapacitanceinpF

V

CC

=supplyvoltageinV

∑(C

L

×V

CC

2×f

o

)=sumofoutputs

heconditionisV

I

=GNDtoV

CC

ForHCTtheconditionisV

I

=GNDtoV

CC

−1.5V

ORDERINGINFORMATION

See“74HC/HCT/HCU/HCMOSLogicPackageInformation”.

SYMBOLPARAMETERCONDITIONS

TYPICAL

UNIT

HCHCT

t

PHL

/t

PLH

propagationdelaynAtonYC

L

=15pF;V

CC

=5V1217ns

C

I

inputcapacitance3.53.5pF

C

PD

powerdissipationcapacitancepergatenotes1and278pF

September19933

PhilipsSemiconductorsProductspecification

HexinvertingSchmitttrigger74HC/HCT14

PINDESCRIPTION

NAMEANDFUNCTION

1,3,5,9,11,131Ato6Adatainputs

2,4,6,8,10,121Yto6Ydataoutputs

7GNDground(0V)

14V

CC

positivesupplyvoltage

.3IEClogicsymbol.

.5Logicdiagram

(oneSchmitttrigger).

FUNCTIONTABLE

Notes

1.H=HIGHvoltagelevel

L=LOWvoltagelevel

APPLICATIONS

•Waveandpulseshapers

•Astablemultivibrators

•Monostablemultivibrators

INPUTOUTPUT

nAnY

L

H

H

L

September19934

PhilipsSemiconductorsProductspecification

HexinvertingSchmitttrigger74HC/HCT14

DCCHARACTERISTICSFOR74HC

FortheDCcharacteristicssee“74HC/HCT/HCU/HCMOSLogicFamilySpecifications”.Transfercharacteristicsare

givenbelow.

Outputcapability:standard

I

CC

category:SSI

Transfercharacteristicsfor74HC

VoltagesarereferencedtoGND(ground=0V)

ACCHARACTERISTICSFOR74HC

GND=0V;t

f

=t

f

=6ns;C

L

=50pF

SYMBOLPARAMETER

T

amb

(°C)

UNIT

TESTCONDITIONS

74HC

V

CC

(V)

WAVEFORMS+25−40to+85−40to+125

.

V

T

+positive-going

threshold

0.7

1.7

2.1

1.18

2.38

3.14

1.5

3.15

4.2

0.7

1.7

2.1

1.5

3.15

4.2

0.7

1.7

2.1

1.5

3.15

4.2

V2.0

4.5

6.0

Figs6and7

V

T

−negative-going

threshold

0.3

0.9

1.2

0.52

1.40

1.89

0.90

2.00

2.60

0.3

0.90

1.20

0.90

2.00

2.60

0.30

0.90

1.2

0.90

2.00

2.60

V2.0

4.5

6.0

Figs6and7

V

H

hysteresis

(V

T

+−V

T

−)

0.2

0.4

0.6

0.66

0.98

1.25

1.0

1.4

1.6

0.2

0.4

0.6

1.0

1.4

1.6

0.2

0.4

0.6

1.0

1.4

1.6

V2.0

4.5

6.0

Figs6and7

SYMBOLPARAMETER

T

amb

(°C)

UNIT

TESTCONDITIONS

74HC

V

CC

(V)

WAVEFORMS+25−40to+85−40to+125

.

t

PHL

/t

PLH

propagationdelay

nAtonY

41

15

12

125

25

21

155

31

26

190

38

32

ns2.0

4.5

6.0

Fig.8

t

THL

/t

TLH

outputtransition

time

19

7

6

75

15

13

95

19

15

110

22

19

ns2.0

4.5

6.0

Fig.8

September19935

PhilipsSemiconductorsProductspecification

HexinvertingSchmitttrigger74HC/HCT14

DCCHARACTERISTICSFOR74HCT

FortheDCcharacteristicssee“74HC/HCT/HCU/HCMOSLogicFamilySpecifications”.Transfercharacteristicsare

givenbelow.

Outputcapability:standard

I

CC

category:SSI

NotetoHCTtypes

Thevalueofadditionalquiescentsupplycurrent(∆I

CC

)foraunitloadof1isgiveninthefamilyspecifications.

Todetermine∆I

CC

perinput,multiplythisvaluebytheunitloadcoefficientshowninthetablebelow.

Transfercharacteristicsfor74HCT

VoltagesarereferencedtoGND(ground=0V)

ACCHARACTERISTICSFOR74HCT

GND=0V;t

r

=t

f

=6ns;C

L

=50pF

INPUTUNITLOADCOEFFICIENT

nA0.3

SYMBOLPARAMETER

T

amb

(°C)

UNIT

TESTCONDITIONS

74HCT

V

CC

(V)

WAVEFORMS+25−40to+85−40to+125

.

V

T

+positive-going

threshold

1.2

1.4

1.41

1.59

1.9

2.1

1.2

1.4

1.9

2.1

1.2

1.4

1.9

2.1

V4.5

5.5

Figs6and7

V

T

−negative-going

threshold

0.5

0.6

0.85

0.99

1.2

1.4

0.5

0.6

1.2

1.4

0.5

0.6

1.2

1.4

V4.5

5.5

Figs6and7

V

H

hysteresis

(V

T

+−V

T

−)

0.4

0.4

0.56

0.60

−

−

0.4

0.4

−

−

0.4

0.4

−

−

V4.5

5.5

Figs6and7

SYMBOLPARAMETER

T

amb

(°C)

UNIT

TESTCONDITIONS

74HCT

V

CC

(V)

WAVEFORMS+25−40to+85−40to+125

.

t

PHL

/t

PLH

propagationdelay

nA,tonY

20344351ns4.5Fig.8

t

THL

/t

TLH

outputtransition

time

7151922ns4.5Fig.8

September19936

PhilipsSemiconductorsProductspecification

HexinvertingSchmitttrigger74HC/HCT14

TRANSFERCHARACTERISTICWAVEFORMS

Fig.6Transfercharacteristic.

Fig.7WaveformsshowingthedefinitionofV

T

+,

V

T

−andV

H

;whereV

T

+andV

T

−are

betweenlimitsof20%and70%.

Fig.8TypicalHCtransfercharacteristics;V

CC

=.9TypicalHCtransfercharacteristics;V

CC

=4.5V.

Fig.10TypicalHCtransfercharacteristics;V

CC

=6V.

Fig.11TypicalHCTtransfercharacteristics;V

CC

=4.5V.

September19937

PhilipsSemiconductorsProductspecification

HexinvertingSchmitttrigger74HC/HCT14

ACWAVEFORMS

Fig.12TypicalHCTtransfercharacteristics;V

CC

=5.5V.

Fig.13Waveformsshowingtheinput(nA)to

output(nY)propagationdelaysand

outputtransitionstimes.

(1)HC:V

M

=50%;V

I

=GNDtoV

CC

.

HCT:V

M

=1.3V;V

I

=GNDto3V.

September19938

PhilipsSemiconductorsProductspecification

HexinvertingSchmitttrigger74HC/HCT14

APPLICATIONINFORMATION

Theslowinputriseandfalltimescauseadditionalpower

dissipation,thiscanbecalculatedusingthefollowing

formula:

P

ad

=f

i

×(t

r

×I

CCa

+t

f

×I

CCa

)×V

CC

.

Where:

AverageI

CCa

differswithpositiveornegativeinput

transitions,asshowninFigs14and15.

P

ad

=additionalpowerdissipation(µW)

f

i

=inputfrequency(MHz)

t

r

=inputrisetime(µs);10%−90%

t

f

=inputfalltime(µs);10%−90%

I

CCa

=averageadditionalsupplycurrent(µA)

Fig.14AverageI

CC

forHCSchmitttriggerdevices;

linearchangeofV

i

between0.1V

CC

to

0.9V

CC

Fig.15AverageI

CC

forHCTSchmitttriggerdevices;

linearchangeofV

i

between0.1V

CC

to

0.9V

CC

.

HC/HCT14usedinarelaxationoscillatorcircuit,see

Fig.16.

Fig.16RelaxationoscillatorusingHC/HCT14.

HC:f

1

T

---

1

0.8RC

------------------

≈=

HCT:f

1

T

---

1

0.67RC

---------------------

≈=

NotetoApplicationinformation

Allvaluesgivenaretypicalunlessotherwisespecified.

PACKAGEOUTLINES

See“74HC/HCT/HCU/HCMOSLogicPackageOutlines”.