TLF11617

October 1995

74VHC14

Hex Schmitt Inverter

General Description

The ’VHC14 is an advanced high speed CMOS Hex Schmitt

Inverter fabricated with silicon gate CMOS technology It

achieves the high speed operation similar to equivalent Bi-

polar Schottky TTL while maintaining the CMOS low power

dissipation Pin configuration and function are the same as

the VHC04 but the inputs have hysteresis between the

positive-going and negative-going input thresholds which

are capable of transforming slowly changing input signals

into sharply defined jitter-free output signals thus providing

greater noise margin than conventional inverters

An input protection circuit ensures that 0V to 7V can be

applied to the input pins without regard to the supply volt-

age This device can be used to interface 5V to 3V systems

and two supply systems such as battery back up This circuit

prevents device destruction due to mismatched supply and

input voltages

Features

Y

Low power dissipation

Y

Y

All inputs are equipped with a power down protection

function

Y

Y

Y

Pin and function compatible with 74HC14

Commercial

Package

Package Description

Number

74VHC14M

M14A

14-Lead Molded JEDEC SOIC

74VHC14SJ

M14D

14-Lead Molded EIAJ SOIC

74VHC14MSC

MSC14

14-Lead Molded EIAJ Type 1 SSOP

74VHC14MTC

MTC14

14-Lead Molded JEDEC Type 1 TSSOP

74VHC14N

N14A

14-Lead Molded DIP

Note

Surface mount packages are also available on Tape and Reel Specify by appending the suffix letter ‘‘X’’ to the ordering code

EIAJ Type 1 SSOP available on Tape and Reel only order MSCX

Logic Symbol

IEEEIEC

TLF11617 – 1

Truth Table

A-Inputs

Y-Outputs

LH

HL

Connection Diagram

Pin Assignment for DIP

SSOP TSSOP and SOIC

TLF11617 – 2

C1995 National Semiconductor Corporation

RRD-B30M125Printed in U S A