sn7414 schmitt trigger

SN5414, SN54LS14,SN7414, SN74LS14

HEX SCHMITT-TRIGGER INVERTERS

SDLS049B – DECEMBER 1983 – REVISED FEBRUARY 2002

1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

Operation From Very Slow Edges

Improved Line-Receiving Characteristics

High Noise Immunity

description

Each circuit functions as an inverter, but becauseof the Schmitt action, it has different inputthreshold levels for positive-going (VT+) andnegative-going (VT–) signals.

These circuits are temperature compensated andcan be triggered from the slowest of input rampsand still give clean, jitter-free output signals.

ORDERING INFORMATION

TA PACKAGE† ORDERABLEPART NUMBER

TOP-SIDEMARKING

PDIP NTube SN7414N SN7414N

PDIP – NTube SN74LS14N SN74LS14N

Tube SN7414D7414

0°C to 70°C SOIC DTape and reel SN7414DR

7414

0°C to 70°C SOIC – DTube SN74LS14D

LS14Tape and reel SN74LS14DR

LS14

SOP – NS Tape and reel SN7414NSR SN7414

SSOP – DB Tape and reel SN74LS14DBR LS14

Tube SN5414J SN5414J

CDIP JTube SNJ5414J SNJ5414J

CDIP – JTube SN54LS14J SN54LS14J

–55°C to 125°C Tube SNJ54LS14J SNJ54LS14J

CFP WTube SNJ5414W SNJ5414W

CFP – WTube SNJ54LS14W SNJ54LS14W

LCCC – FK Tube SNJ54LS14FK SNJ54LS14FK† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

Copyright 2002, Texas Instruments IncorporatedPRODUCTION DATA information is current as of publication date.Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily includetesting of all parameters.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

SN5414, SN54LS14 . . . J OR W PACKAGESN7414 . . . D, N, OR NS PACKAGE

SN74LS14 . . . D, DB, OR N PACKAGE(TOP VIEW)

1

2

3

4

5

6

7

14

13

12

11

10

9

8

1A1Y2A2Y3A3Y

GND

VCC6A6Y5A5Y4A4Y

3 2 1 20 19

9 10 11 12 13

4

5

6

7

8

18

17

16

15

14

6YNC5ANC5Y

2ANC2YNC3A

1Y 1A NC

4Y 4A6A

3YG

ND

NC

NC – No internal connection

V CC

SN54LS14 . . . FK PACKAGE(TOP VIEW)

On products compliant to MIL-PRF-38535, all parameters are testedunless otherwise noted. On all other products, productionprocessing does not necessarily include testing of all parameters.

SN5414, SN54LS14,SN7414, SN74LS14HEX SCHMITT-TRIGGER INVERTERS


2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

logic diagram (positive logic)

1A

2A

3A

4A

5A

6A

1Y

2Y

3Y

4Y

5Y

6Y

1

3

5

9

11

13

2

4

6

8

10

12

Y = A

Pin numbers shown are for the D, DB, J, N, NS, and W packages.

SN5414, SN54LS14,SN7414, SN74LS14




schematic

’14

GND

Output Y

100 Ω

VCC

6 kΩ

Input A

GND

Output Y

VCC

20 kΩ

Input A

’LS14

Resistor values shown are nominal.




absolute maximum ratings over operating free-air temperature (unless otherwise noted)†

Supply voltage, VCC (see Note 1) 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage: ’14 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

’LS14 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package thermal impedance, θJA (see Note 2):D package 86°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DB package 96°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N package 80°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NS package 76°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperaturerange, Tstg –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, andfunctional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is notimplied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. Voltage values are with respect to network ground terminal.2. The package termal impedance is calculated in accordance with JESD 51-7

recommended operating conditions

SN5414 SN7414UNIT

MIN NOM MAX MIN NOM MAXUNIT

VCC Supply voltage 4.5 5 5.5 4.75 5 5.25 V

IOH High-level output current –0.8 –0.8 mA

IOL Low-level output current 16 16 mA

TA Operating free-air temperature –55 125 0 70 °C

electrical characteristics over recommended operating free-air temperature range (unlessotherwise noted)

PARAMETER TEST CONDITIONS‡SN5414SN7414 UNITTEST CONDITIONS

MIN TYP§ MAX

VT+ VCC = 5 V 1.5 1.7 2 V

VT– VCC = 5 V 0.6 0.9 1.1 V

Hysteresis(VT+ – VT–)

VCC = 5 V 0.4 0.8 V

VIK VCC = MIN, II = –12 mA –1.5 V

VOH VCC = MIN, VI = 0.6 V, IOH = –0.8 mA 2.4 3.4 V

VOL VCC = MIN, VI = 2 V, IOL = 16 mA 0.2 0.4 V

IT+ VCC = 5 V, VI = VT+ –0.43 mA

IT– VCC = 5 V, VI = VT– –0.56 mA

II VCC = MAX, VI = 5.5 V 1 mA

IIH VCC = MAX, VIH = 2.4 V 40 µA

IIL VCC = MAX, VIL = 0.4 V –0.8 –1.2 mA

IOS¶ VCC = MAX –18 –55 mA

ICCH VCC = MAX 22 36 mA

ICCL VCC = MAX 39 60 mA

‡ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.§ All typical values are at VCC = 5 V, TA = 25°C.¶ Not more than one output should be shorted at a time.

SN5414, SN54LS14,SN7414, SN74LS14




switching characteristics, VCC = 5 V, TA = 25°C (see Figure 1)

PARAMETERFROM

(INPUT)TO

(OUTPUT) TEST CONDITIONS

SN5414SN7414 UNITPARAMETER (INPUT) (OUTPUT) TEST CONDITIONS

MIN TYP MAXUNIT

MIN TYP MAX

tPLHA Y RL = 400 Ω CL = 15 pF

15 22ns

tPHLA Y RL = 400 Ω, CL = 15 F

15 22ns

recommended operating conditions

SN54LS14 SN74LS14UNIT

MIN NOM MAX MIN NOM MAXUNIT

VCC Supply voltage 4.5 5 5.5 4.75 5 5.25 V

IOH High-level output current –0.4 –0.4 mA

IOL Low-level output current 4 8 mA

TA Operating free-air temperature –55 125 0 70 °C

electrical characteristics over recommended operating free-air temperature range (unlessotherwise noted)

PARAMETER TEST CONDITIONS†SN54LS14 SN74LS14

UNITPARAMETER TEST CONDITIONS†MIN TYP‡ MAX MIN TYP‡ MAX

UNIT

VT+ VCC = 5 V 1.4 1.6 1.9 1.4 1.6 1.9 V

VT– VCC = 5 V 0.5 0.8 1 0.5 0.8 1 V

Hysteresis(VT+ – VT–)

VCC = 5 V 0.4 0.8 0.4 0.8 V

VIK VCC = MIN, II = –18 mA –1.5 –1.5 V

VOH VCC = MIN, VI = 0.5 V, IOH = –0.4 mA 2.5 3.4 2.7 3.4 V

VOL VCC = MIN VI = 1 9 VIOL= 4 mA 0.25 0.4 0.25 0.4

VVOL VCC = MIN, VI = –1.9 VIOL = 8 mA 0.35 0.5

V

IT+ VCC = 5 V, VI = VT+ –0.14 –0.14 mA

IT– VCC = 5 V, VI = VT– –0.18 –0.18 mA

II VCC = MAX, VI = 7 V 0.1 0.1 mA

IIH VCC = MAX, VIH = 2.7 V 20 20 µA

IIL VCC = MAX, VIL = 0.4 V –0.4 –0.4 mA

IOS§ VCC = MAX –20 –100 –20 –100 mA

ICCH VCC = MAX 8.6 16 8.6 16 mA

ICCL VCC = MAX 12 21 12 21 mA

† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.‡ All typical values are at VCC = 5 V, TA = 25°C.§ Not more than one output should be shorted at a time, and duration of the short-circuit should not exceed one second.

switching characteristics, VCC = 5 V, TA = 25°C (see Figure 2)

PARAMETERFROM TO

TEST CONDITIONS MIN TYP MAX UNITPARAMETER(INPUT) (OUTPUT)

TEST CONDITIONS MIN TYP MAX UNIT

tPLHA Y RL = 2 kΩ CL = 15 pF

15 22ns

tPHLA Y RL = 2 kΩ, CL = 15 F

15 22ns




PARAMETER MEASUREMENT INFORMATIONSERIES 54/74 DEVICES

tPHL tPLH

tPLH tPHL

LOAD CIRCUITFOR 3-STATE OUTPUTS

High-LevelPulse

Low-LevelPulse

VOLTAGE WAVEFORMSPULSE DURATIONS

Input

Out-of-PhaseOutput

(see Note D)

3 V

0 V

VOL

VOH

VOH

VOL

In-PhaseOutput

(see Note D)

VOLTAGE WAVEFORMSPROPAGATION DELAY TIMES

VCC

RL

Test Point

From OutputUnder Test

CL(see Note A)

LOAD CIRCUITFOR OPEN-COLLECTOR OUTPUTS

LOAD CIRCUITFOR 2-STATE TOTEM-POLE OUTPUTS

(see Note B)

VCC

RLFrom Output

Under Test

CL(see Note A)

TestPoint

(see Note B)

VCCRL


CL(see Note A)

TestPoint

1 kΩ

NOTES: A. CL includes probe and jig capacitance.B. All diodes are 1N3064 or equivalent.C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.D. S1 and S2 are closed for tPLH, tPHL, tPHZ, and tPLZ; S1 is open and S2 is closed for tPZH; S1 is closed and S2 is open for tPZL.E. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO ≈ 50 Ω; tr and tf ≤ 7 ns for Series

54/74 devices and tr and tf ≤ 2.5 ns for Series 54S/74S devices.F. The outputs are measured one at a time with one input transition per measurement.

S1

S2

tPHZ

tPLZtPZL

tPZH

3 V

3 V

0 V

0 V

thtsu

VOLTAGE WAVEFORMSSETUP AND HOLD TIMES

TimingInput

DataInput

3 V

0 V

OutputControl

(low-levelenabling)

Waveform 1(see Notes C

and D)


and D)≈1.5 V

VOH – 0.5 V

VOL + 0.5 V

≈1.5 V

VOLTAGE WAVEFORMSENABLE AND DISABLE TIMES, 3-STATE OUTPUTS

1.5 V 1.5 V

1.5 V 1.5 V

1.5 V

1.5 V 1.5 V

1.5 V 1.5 V

1.5 V

1.5 V

tw

1.5 V 1.5 V

1.5 V 1.5 V

1.5 V 1.5 V

VOH

VOL

Figure 1. Load Circuits and Voltage Waveforms

SN5414, SN54LS14,SN7414, SN74LS14




PARAMETER MEASUREMENT INFORMATIONSERIES 54LS/74LS DEVICES

tPHL tPLH

tPLH tPHL

LOAD CIRCUITFOR 3-STATE OUTPUTS

High-LevelPulse

Low-LevelPulse

VOLTAGE WAVEFORMSPULSE DURATIONS

Input

Out-of-PhaseOutput

(see Note D)

3 V

0 V

VOL

VOH

VOH

VOL

In-PhaseOutput

(see Note D)

VOLTAGE WAVEFORMSPROPAGATION DELAY TIMES

VCC

RL

Test Point


CL(see Note A)

LOAD CIRCUITFOR OPEN-COLLECTOR OUTPUTS

LOAD CIRCUITFOR 2-STATE TOTEM-POLE OUTPUTS

(see Note B)

VCC

RLFrom Output

Under Test

CL(see Note A)

TestPoint

(see Note B)

VCCRL


CL(see Note A)

TestPoint

5 kΩ

NOTES: A. CL includes probe and jig capacitance.B. All diodes are 1N3064 or equivalent.C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.D. S1 and S2 are closed for tPLH, tPHL, tPHZ, and tPLZ; S1 is open and S2 is closed for tPZH; S1 is closed and S2 is open for tPZL.E. Phase relationships between inputs and outputs have been chosen arbitrarily for these examples.F. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO ≈ 50 Ω, tr ≤ 1.5 ns, tf ≤ 2.6 ns.G. The outputs are measured one at a time with one input transition per measurement.

S1

S2

tPHZ

tPLZtPZL

tPZH

3 V

3 V

0 V

0 V

thtsu

VOLTAGE WAVEFORMSSETUP AND HOLD TIMES

TimingInput

DataInput

3 V

0 V

OutputControl

(low-levelenabling)


and D)


and D) ≈1.5 V

VOH – 0.5 V

VOL + 0.5 V

≈1.5 V

VOLTAGE WAVEFORMSENABLE AND DISABLE TIMES, 3-STATE OUTPUTS

1.3 V 1.3 V

1.3 V 1.3 V

1.3 V

1.3 V 1.3 V

1.3 V 1.3 V

1.3 V

1.3 V

tw

1.3 V 1.3 V

1.3 V 1.3 V

1.3 V 1.3 V

VOL

VOH

Figure 2. Load Circuits and Voltage Waveforms




TYPICAL CHARACTERISTICS OF ’14 CIRCUITS†

T+

Figure 3

–25–50–75

1.64

1.62

1.61

1.600 25 50

– P

osi

tive

-Go

ing

Th

resh

old

Vo

ltag

e –

V

1.66

1.67

POSITIVE-GOING THRESHOLD VOLTAGEvs

FREE-AIR TEMPERATURE1.70

75 100 125

1.65

1.63

TA – Free-Air Temperature – °C

V

VCC = 5 V

1.68

1.69

Figure 4

T–

–25–50–75

0.84

0.82

0.81

0.800 25 50

– N

egat

ive-

Go

ing

Th

resh

old

Vo

ltag

e –

V

0.86

0.87

NEGATIVE-GOING THRESHOLD VOLTAGEvs


75 100 125

0.85

0.83


V

VCC = 5 V

0.88

0.89

T+

–

–25–50–75

790

770

760

7500 25 50

– H

yste

resi

s –

mV

810

820

HYSTERESISvs

FREE-AIR TEMPERATURE850

75 100 125

800

780


V

VCC = 5 V

830

840

Figure 5

T–

V

† Data for temperatures below 0°C and above 70°C and supply voltage below 4.75 V and above 5.25 V are applicable for SN5414 only.

SN5414, SN54LS14,SN7414, SN74LS14




TYPICAL CHARACTERISTICS OF ’14 CIRCUITS†

Figure 6

780760 800 820 840

DISTRIBUTION OF UNITSFOR HYSTERESIS

860 880 900

VT+ – VT– – Hysteresis – mV

VCC = 5 VTA = 25°C

Rel

ativ

e F

req

uen

cy o

f Occ

ure

nce

740

Figure 7

4.754.5

0.8

0.4

0.2

05

Th

resh

old

Vo

ltag

e -–

V

1.2

1.4

THRESHOLD VOLTAGESvs

SUPPLY VOLTAGE2.0

5.25 5.5

1.0

0.6

TA = 25°C

1.6

1.8


Positive-Going Threshold Voltage, VT+

Negative-Going Threshold Voltage, VT–

4.5

0.8

0.4

0.2

0

1.2

1.4

2.0

1.0

0.6

1.6

1.8

Figure 8

4.75 5

HYSTERESISvs

SUPPLY VOLTAGE

5.25 5.5

TA = 25°C

VCC – Supply Voltage – V

T+

––

Hys

tere

sis

– V

VT

–V

V

Figure 9

0.40

1

00.8

2

OUTPUT VOLTAGEvs

INPUT VOLTAGE4

1.2 2

3


O–

Ou

tpu

t V

olt

age

– V

VCC = 5 VTA = 25°C

1.6

VT– VT+





TYPICAL CHARACTERISTICS OF ’LS14 CIRCUITS†

Figure 10

1.64

1.62

1.61

1.60

Po

siti

ve-G

oin

g T

hre

sho

ld V

olt

age

– V

1.66

1.67

POSITIVE-GOING THRESHOLD VOLTAGEvs


1.65

1.63

VCC = 5 V

1.68

1.69

TA – Free-Air Temperature – °C–25–50–75 0 25 50 75 100 125

T+

–V

Figure 11

0.84

0.82

0.81

0.80

0.86

0.87

NEGATIVE-GOING THRESHOLD VOLTAGEvs


0.85

0.83

VCC = 5 V

0.88

0.89

–25–50–75 0 25 50 75 100 125TA – Free-Air Temperature – °C

– N

egat

ive-

Go

ing

Th

resh

old

Vo

ltag

e –

VT

– V

Figure 12

790

770

760

750

810

820

HYSTERESISvs

FREE-AIR TEMPERATURE850

800

780

VCC = 5 V

830

840

–25–50–75 0 25 50 75 100 125


T+

––

Hys

tere

sis

– V

VT

–V

Figure 13

760740 780 800 820

DISTRIBUTION OF UNITSFOR HYSTERESIS

840 860 880


VCC = 5 VTA = 25°C

Rel

ativ

e F

req

uen

cy o

f Occ

ure

nce

720

99% AREABOVE 735 mV


SN5414, SN54LS14,SN7414, SN74LS14




TYPICAL CHARACTERISTICS OF ’LS14 CIRCUITS†

Figure 14

0.8

0.4

0.2

0

1.2

1.4

THRESHOLD VOLTAGES AND HYSTERESISvs

SUPPLY VOLTAGE2.0

1.0

0.6

TA = 25°C

1.6

1.8


4.754.5 5 5.25 5.5

Th

resh

old

Vo

ltag

e –

V

Positive-Going Threshold Voltage, VT+

Negative-Going Threshold Voltage, VT–

Hysteresis, VT+ – VT–

Figure 15

0.40

1

00.8

2

OUTPUT VOLTAGEvs

INPUT VOLTAGE4

1.2 2

3

VI – Input Voltage – V

O–

Ou

tpu

t V

olt

age

– V

V

VCC = 5 VTA = 25°C

1.6

VT– VT+





TYPICAL APPLICATION DATA

TTL System

CMOS

Sine-WaveOscillator

TTL System Interfacefor Slow Input Waveforms

330 Ω

Input

Multivibrator

0.1 Hz to 10 MHz

Open-CollectorOutput

Input Output

Pulse Stretcher

Pulse Shaper

Input

Output

VT–

VT+

VT–

VT+

Input

Output

Threshold Detector

VT+

Input

Output

Point A

A

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,enhancements, improvements, and other changes to its products and services at any time and to discontinueany product or service without notice. Customers should obtain the latest relevant information before placingorders and should verify that such information is current and complete. All products are sold subject to TI’s termsand conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale inaccordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TIdeems necessary to support this warranty. Except where mandated by government requirements, testing of allparameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible fortheir products and applications using TI components. To minimize the risks associated with customer productsand applications, customers should provide adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or processin which TI products or services are used. Information published by TI regarding third–party products or servicesdoes not constitute a license from TI to use such products or services or a warranty or endorsement thereof.Use of such information may require a license from a third party under the patents or other intellectual propertyof the third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is withoutalteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproductionof this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable forsuch altered documentation.

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Mailing Address:

Texas InstrumentsPost Office Box 655303Dallas, Texas 75265

Copyright 2002, Texas Instruments Incorporated

sn7414 schmitt trigger

Documents

deceptive business practice

sn74ls14 hex schmitt

cl includes probe

ma ma ma

voltage waveforms enable

recommended operating conditions

necessarily include testing

recommended operating free