© Semiconductor Components Industries, LLC, 2006

June, 2006 − Rev. 2

1

Publication Order Number:

SN74LS14/D

SN74LS14

Schmitt Triggers

Dual Gate/Hex Inverter

The SN74LS14 contains logic gates/ 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. Additionally, they have

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 totem pole output. The

Schmitt trigger uses positive feedback to effectively speed-up slow

input transitions, 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.

LOGIC AND CONNECTION DIAGRAMS

SN74LS14

14

13

12

11

10

9

123456

8

7

GND

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min

Typ

Max

Unit

Supply Voltage

4.75

5.0

5.25

V

Operating Ambient

Temperature Range

0

25

70

°C

Output Current − High

−0.4

mA

Output Current − Low

8.0

mA

LOW

POWER

SCHOTTKY

SOIC

D SUFFIX

CASE 751A

PLASTIC

N SUFFIX

CASE 646

14

1

14

1

Device

Package

Shipping

ORDERING INFORMATION

SN74LS14N

14 Pin DIP

2000 Units/Box

SN74LS14D

SOIC−14

55 Units/Rail

SN74LS14DR2

SOIC−14

2500/Tape & Reel

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