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SN54AHCT14, SN74AHCT14

HEX SCHMITT-TRIGGER INVERTERS

 

 

SCLS246M – OCTOBER 1995 – REVISED JANUARY 2000

1

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

D

EPIC

 (Enhanced-Performance Implanted

CMOS) Process

D

Inputs Are TTL-Voltage Compatible

D

Latch-Up Performance Exceeds 250 mA Per

JESD 17

D

ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

D

Package Options Include Plastic

Small-Outline (D), Shrink Small-Outline

(DB), Thin Very Small-Outline (DGV), Thin

Shrink Small-Outline (PW), and Ceramic Flat

(W) Packages, Ceramic Chip Carriers (FK),

and Standard Plastic (N) and Ceramic (J)

DIPs

description

The ’AHCT14 devices contain six independent

inverters. These devices perform the Boolean

function Y = A.

Each circuit functions as an independent inverter,

but because of the Schmitt action, the inverters

have different input threshold levels for

positive-going (V

T+

) and for negative-going (V

T–

)

signals.

The SN54AHCT14 is characterized for operation

over the full military temperature range of –55

°

C

to 125

°

C. The SN74AHCT14 is characterized for

operation from –40

°

C to 85

°

C.

FUNCTION TABLE

(each inverter)

INPUT

A

OUTPUT

Y

H

L

L

H

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

 

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright 

©

 2000, Texas Instruments Incorporated

1

2

3

4

5

6

7

14

13

12

11

10

9

8

1A

1Y

2A

2Y

3A

3Y

GND

V

CC

6A

6Y

5A

5Y

4A

4Y

SN54AHCT14 . . . J  OR  W  PACKAGE

SN74AHCT14 . . . D, DB, DGV, N, OR PW PACKAGE

(TOP VIEW)

3

2 1 20 19

9 10 11 12 13

4

5

6

7

8

18

17

16

15

14

6Y

NC

5A

NC

5Y

2A

NC

2Y

NC

3A

1Y

1A

NC

4Y

4A

V

6A

3Y

GND

NC

SN54AHCT14 . . . FK PACKAGE

(TOP VIEW)

CC

NC – No internal connection

EPIC is a trademark of Texas Instruments Incorporated.

On products compliant to MIL-PRF-38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.

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SN54AHCT14, SN74AHCT14

HEX SCHMITT-TRIGGER INVERTERS

 

 

SCLS246M – OCTOBER 1995 – REVISED JANUARY 2000

2

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

logic symbol

1

1A

1Y

2

3

2A

2Y

4

5

3A

3Y

6

9

4A

4Y

8

11

5A

5Y

10

13

6A

6Y

12

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

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

logic diagram, each inverter (positive logic)

Y

A

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

Supply voltage range, V

CC

 

–0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Input voltage range, V

I

 (see Note 1) 

–0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Output voltage range, V

O

 (see Note 1) 

–0.5 V to V

CC

 + 0.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Input clamp current, I

IK 

(V

< 0) 

–20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Output clamp current, I

OK 

(V

< 0 or V

O

 > V

CC

±

20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Continuous output current, I

(V

= 0 to V

CC

±

25 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Continuous current through V

CC

 or GND 

±

50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Package thermal impedance, 

θ

JA

 (see Note 2): D package 

86

°

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

DB package 

96

°

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

DGV package 

127

°

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

N package 

80

°

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

PW package 

113

°

C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Storage temperature range, T

stg

 –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, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

2. The package thermal impedance is calculated in accordance with JESD 51.

recommended operating conditions (see Note 3)

SN54AHCT14

SN74AHCT14

UNIT

MIN

MAX

MIN

MAX

UNIT

VCC

Supply voltage

4.5

5.5

4.5

5.5

V

VI

Input voltage

0

5.5

0

5.5

V

VO

Output voltage

0

VCC

0

VCC

V

IOH

High-level output current

–8

–8

mA

IOL

Low-level output current

8

8

mA

TA

Operating free-air temperature

–55

125

–40

85

°

C

NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,

Implications of Slow or Floating CMOS Inputs, literature number SCBA004.

background image

SN54AHCT14, SN74AHCT14

HEX SCHMITT-TRIGGER INVERTERS

 

 

SCLS246M – OCTOBER 1995 – REVISED JANUARY 2000

3

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25

°

C

SN54AHCT14

SN74AHCT14

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

VT+

Positive going input

4.5 V

0.9

1.9

0.9

1.9

0.9

1.9

V

Positive-going input

threshold voltage

5.5 V

1

2.1

1

2.1

1

2.1

V

VT–

Negative going input

4.5 V

0.5

1.5

0.5

1.5

0.5

1.5

V

Negative-going input

threshold voltage

5.5 V

0.6

1.7

0.6

1.7

0.6

1.7

V

VT

Hysteresis

4.5 V

0.4

1.4

0.4

1.4

0.4

1.4

V

Hysteresis

(VT+ – VT–)

5.5 V

0.4

1.5

0.4

1.5

0.4

1.5

V

VOH

IOH = –50 

m

A

4.5 V

4.4

4.5

4.4

4.4

V

VOH

IOH = –8 mA

4.5 V

3.94

3.8

3.8

V

VOL

IOL = 50 

m

A

4.5 V

0.1

0.1

0.1

V

VOL

IOL = 8 mA

4.5 V

0.36

0.44

0.44

V

II

VI = VCC or GND

0 V to 5.5 V

±

0.1

±

1*

±

1

m

A

ICC

VI = VCC or GND,

IO = 0

5.5 V

2

20

20

m

A

ICC†

One input at 3.4 V,

Other inputs at VCC or GND

5.5 V

1.35

1.5

1.5

mA

Ci

VI = VCC or GND

5 V

2

10

10

pF

* On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.

† This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC.

switching characteristics over recommended operating free-air temperature range 

V

CC 

= 5 V

±

0.5 V (unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

LOAD

TA = 25

°

C

SN54AHCT14

SN74AHCT14

UNIT

PARAMETER

(INPUT)

(OUTPUT)

CAPACITANCE

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

tPLH

A

Y

CL = 15 pF

4**

7**

1**

8**

1

8

ns

tPHL

A

Y

CL = 15 pF

4**

7**

1**

8**

1

8

ns

tPLH

A

Y

CL = 50 pF

5.5

8

1

9

1

9

ns

tPHL

A

Y

CL = 50 pF

5.5

8

1

9

1

9

ns

** On products compliant to MIL-PRF-38535, this parameter is not production tested.

noise characteristics, V

CC 

= 5 V, C

L

 = 50 pF, T

A

 = 25

°

C (see Note 4)

PARAMETER

SN74AHCT14

UNIT

PARAMETER

MIN

TYP

MAX

UNIT

VOL(P)

Quiet output, maximum dynamic VOL

0.9

V

VOL(V)

Quiet output, minimum dynamic VOL

–0.7

V

VOH(V)

Quiet output, minimum dynamic VOH

4.3

V

VIH(D)

High-level dynamic input voltage

2.1

V

VIL(D)

Low-level dynamic input voltage

0.5

V

NOTE 4: Characteristics are for surface-mount packages only.

operating characteristics, V

CC 

= 5 V, T

A

 = 25

°

C

PARAMETER

TEST CONDITIONS

TYP

UNIT

Cpd

Power dissipation capacitance

No load,

f = 1 MHz

12

pF

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SN54AHCT14, SN74AHCT14

HEX SCHMITT-TRIGGER INVERTERS

 

 

SCLS246M – OCTOBER 1995 – REVISED JANUARY 2000

4

POST OFFICE BOX 655303 

 DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

50% VCC

3 V

3 V

0 V

0 V

th

tsu

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

Data Input

tPLH

tPHL

tPHL

tPLH

VOH

VOH

VOL

VOL

3 V

0 V

50% VCC

50% VCC

Input

Out-of-Phase

Output

In-Phase

Output

Timing Input

50% VCC

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

INVERTING AND NONINVERTING OUTPUTS

Output

Control

Output

Waveform 1

S1 at VCC

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

VOL

VOH

tPZL

tPZH

tPLZ

tPHZ

VCC

0 V

50% VCC

VOL

 

+ 0.3 V

50% VCC

0 V

3 V

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

LOW- AND HIGH-LEVEL ENABLING

tPLH/tPHL

tPLZ/tPZL

tPHZ/tPZH

Open Drain

Open

VCC

GND

VCC

TEST

S1

3 V

0 V

tw

VOLTAGE WAVEFORMS

PULSE DURATION

Input

NOTES: A. CL includes probe and jig capacitance.

B. 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.

C. All input pulses are supplied by generators having the following characteristics: PRR 

 1 MHz, ZO = 50 

, tr 

3 ns, tf 

 3 ns.

D. The outputs are measured one at a time with one input transition per measurement.

From Output

Under Test

CL

(see Note A)

LOAD CIRCUIT FOR

3-STATE AND OPEN-DRAIN OUTPUTS

S1

VCC

RL = 1 k

GND

From Output

Under Test

CL

(see Note A)

Test

Point

LOAD CIRCUIT FOR

TOTEM-POLE OUTPUTS

Open

VOH –

 

0.3 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

Figure 1. Load Circuit and Voltage Waveforms

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any product or service without notice, and advise customers to obtain the latest version of relevant information

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pertaining to warranty, patent infringement, and limitation of liability.

TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent

TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily

performed, except those mandated by government requirements.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF

DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL

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In order to minimize risks associated with the customer’s applications, adequate design and operating

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TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent

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Copyright 

©

 2000, Texas Instruments Incorporated