NSC 5962-8875201DA, 5962-88752012A, 5962-8875201CA Datasheet

TL/F/9461

54F/74F14 Hex Inverter Schmitt Trigger

December 1994

54F/74F14
Hex Inverter Schmitt Trigger

General Description

The ’F14 contains six logic inverters which accept standard
TTL input signals and provide standard TTL output levels.
They are capable of transforming slowly changing input sig­nals into sharply defined, jitter-free output signals. In addi­tion, they have a greater noise margin than conventional
inverters.

Each circuit contains a Schmitt trigger followed by a Darling­ton level shifter and a phase splitter driving a TTL totem­pole output. The Schmitt trigger uses positive feed back to

effectively speed-up slow input transition, and provide differ­ent input threshold voltages for positive and negative-going
transitions. This hysteresis between the positive-going and
negative-going input thresholds (typically 800 mV) is deter­mined internally by resistor ratios and is essentially insensi­tive to temperature and supply voltage variations.

Features

Y

Guaranteed 4000V minimum ESD protection

Y

Standard Military Drawing
Ð 5962-88752

Commercial Military

Package

Package Description

Number

74F14PC N14A 14-Lead (0.300×Wide) Molded Dual-In-Line

54F14DM (Note 2) J14A 14-Lead Ceramic Dual-In-Line

74F14SC (Note 1) M14A 14-Lead (0.150×Wide) Molded Small Outline, JEDEC

74F14SJ (Note 1) M14D 14-Lead (0.300×Wide) Molded Small Outline, EIAJ

54F14FM (Note 2) W14B 14-Lead Cerpack

54F14LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C

Note 1: Devices also available in 13×reel. Use SuffixeSCX and SJX.

Note 2: Military grade device with environmental and burn-in processing. Use suffix

e

DMQB, FMQB and LMQB.

Logic Symbol

IEEE/IEC

TL/F/9461– 3

Connection Diagrams

Pin Assignment

DIP, SOIC and Flatpak

TL/F/9461– 1

Pin Assignment

for LCC

TL/F/9461– 2

TRI-STATEÉis a registered trademark of National Semiconductor Corporation.

C

1995 National Semiconductor Corporation RRD-B30M75/Printed in U. S. A.

Unit Loading/Fan Out

54F/74F

Pin Names Description

U.L. Input I

IH/IIL

HIGH/LOW Output IOH/I

OL

I

n

Input 1.0/1.0 20 mA/b0.6 mA

O

n

Output 50/33.3

b

1 mA/20 mA

Function Table

Input Output

AO

LH
HL

H

e

HIGH Voltage Level

L

e

LOW Voltage Level

2

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.

Storage Temperature

b

65§Ctoa150§C

Ambient Temperature under Bias

b

55§Ctoa125§C

Junction Temperature under Bias

b

55§Ctoa175§C

VCCPin Potential to

Ground Pin

b

0.5V toa7.0V

Input Voltage (Note 2)

b

0.5V toa7.0V

Input Current (Note 2)

b

30 mA toa5.0 mA

Voltage Applied to Output

in HIGH State (with V

CC

e

0V)

Standard Output

b

0.5V to V

CC

TRI-STATEÉOutput

b

0.5V toa5.5V

Current Applied to Output

in LOW State (Max) twice the rated I

OL

(mA)

ESD Last Passing Voltage (Min) 4000V

Note 1: Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under
these conditions is not implied.

Note 2: Either voltage limit or current limit is sufficient to protect inputs.

Recommended Operating
Conditions

Free Air Ambient Temperature

Military

b

55§Ctoa125§C

Commercial 0

§

Ctoa70§C

Supply Voltage

Military

a

4.5V toa5.5V

Commercial

a

4.5V toa5.5V

DC Electrical Characteristics

Symbol Parameter

54F/74F

Units V

CC

Conditions

Min Typ Max

V

T

a

Positive-Going Threshold 1.5 1.7 2.0 V 5.0V

V

T

b

Negative-Going Threshold 0.7 0.9 1.1 V 5.0V

DV

T

Hysteresis (V

T

a

–V

T

b

) 0.4 0.8 V 5.0V

V

CD

Input Clamp Diode Voltage

b

1.2 V Min I

IN

eb

18 mA

V

OH

Output HIGH 54F 10% V

CC

2.5 I

OH

eb

1mA

Voltage 74F 10% V

CC

2.5 V Min I

OH

eb

1mA

74F 5% V

CC

2.7 I

OH

eb

1mA

V

OL

Output LOW 54F 10% V

CC

0.5
V Min

I

OL

e

20 mA

Voltage 74F 10% V

CC

0.5 I

OL

e

20 mA

I

IH

Input HIGH 54F 20.0

mA Max

V

IN

e

2.7V

Current 74F 5.0

I

BVI

Input HIGH Current 54F 100

mA Max

V

IN

e

7.0V

Breakdown Test 74F 7.0

I

CEX

Output HIGH 54F 250

mA Max

V

OUT

e

V

CC

Leakage Current 74F 50

V

ID

Input Leakage

74F 4.75 V Max

I

ID

e

1.9 mA

Test All Other Pins Grounded

I

OD

Output Leakage

74F 3.75 mA 0.0

V

IOD

e

150 mV

Circuit Current All Other Pins Grounded

I

IL

Input LOW Current

b

0.6 mA Max V

IN

e

0.5V

I

OS

Output Short-Circuit Current

b

60

b

150 mA Max V

OUT

e

0V

I

CCH

Power Supply Current 25 mA Max V

O

e

HIGH

I

CCL

Power Supply Current 25 mA Max V

O

e

LOW

3