June 1993

Revised April 1999

© 1999 Fairchild Semiconductor Corporation

DS011617.prf

www.fairchildsemi.com

74VHC14

Hex Schmitt Inverter

General Description

The VHC14 is an advanced high speed CMOS Hex

Schmitt Inverter fabricated with silicon gate CMOS technol-

ogy. It achieves the high speed operation similar to equiva-

lent Bipolar 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 out-

put signals, thus providing greater noise margin than con-

ventional 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 cir-

cuit prevents device destruction due to mismatched supply

and input voltages.

Features

s Power down protection is provided on all inputs

s Pin and function compatible with 74HC14

Ordering Code:

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

Logic Symbol

IEEE/IEC

Pin Descriptions

Connection Diagram

Truth Table

Order Number

Package Number

Package Description

74VHC14M

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow

74VHC14SJ

M14D

14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74VHC14MTC

MTC14

14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74VHC14N

N14A

14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Pin Names

Description

Inputs

Outputs

AO

LH

HL