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MC74VHCT540A

Octal Bus Buffer Inverting

Motorola => Freescale 

MC74VHCT540A

Octal Bus Buffer

Inverting

The MC74VHCT540A is an advanced high speed CMOS inverting

octal bus buffer fabricated with silicon gate CMOS technology. It

achieves high speed operation similar to equivalent Bipolar Schottky

TTL while maintaining CMOS low power dissipation.

The MC74VHCT540A features inputs and outputs on opposite

sides of the package and two AND−ed active−low output enables.

When either OE1 or OE2 are high, the terminal outputs are in the

high impedance state.

The VHCT inputs are compatible with TTL levels. This device can

be used as a level converter for interfacing 3.3 V to 5.0 V, because it

has full 5.0 V CMOS level output swings.

The VHCT540A input and output (when disabled) structures

provide protection when voltages between 0 V and 5.5 V are applied,

regardless of the supply voltage. These input and output structures

help prevent device destruction caused by supply voltage −

input/output voltage mismatch, battery backup, hot insertion, etc.

The internal circuit is composed of three stages, including a buffer

output which provides high noise immunity and stable output. The

inputs tolerate voltages up to 7.0 V, allowing the interface of 5.0 V

systems to 3.0 V systems.

Features

• High Speed: tPD = 3.7 ns (Typ) at VCC = 5.0 V

• Low Power Dissipation: ICC = 4.0 μA (Max) at TA = 25°C

• TTL−Compatible Inputs: VIL = 0.8 V; VIH = 2.0 V

• Power Down Protection Provided on Inputs

• Balanced Propagation Delays

• Designed for 2.0 V to 5.5 V Operating Range

• Low Noise: VOLP = 1.2 V (Max)

• Pin and Function Compatible with Other Standard Logic Families

• Latchup Performance Exceeds 300 mA

• ESD Performance: HBM > 2000 V; Machine Model > 200 V

• Chip Complexity: 124 FETs or 31 Equivalent Gates

• These Devices are Pb−Free and are RoHS Compliant

http://onsemi.com

MARKING

DIAGRAM

20

1

SOEIAJ−20

M SUFFIX

CASE 967

74VHCT540

AWLYWWG

A

= Assembly Location

WL = Wafer Lot

Y

= Year

WW = Work Week

G

= Pb−Free Package

FUNCTION TABLE

Inputs

OE1 OE2

A

Output Y

L

L

L

H

L

L

H

L

H

X

X

Z

X

H

X

Z

ORDERING INFORMATION

Device

Package Shipping†

MC74VHCT540AMG SOEIAJ 40 Units/Rail

MC74VHCT540AMELG SOEIAJ 2000 Units/T&R

†For information on tape and reel specifications,

including part orientation and tape sizes, please

refer to our Tape and Reel Packaging Specification

Brochure, BRD8011/D.

© Semiconductor Components Industries, LLC, 2011

1

June, 2011 − Rev. 6

Publication Order Number:

MC74VHCT540A/D

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