Octal Bus Buffer

Inverting

The MC74VHC540 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 MC74VHC540 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 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 7V, allowing the interface of 5V systems

to 3V systems.

apply to both standard and Pb--free devices. Please see our website at

www.onsemi.com for specific Pb--free orderable part numbers, or

contact your local ON Semiconductor sales office or representative.

ON Semiconductort

© Semiconductor Components Industries, LLC, 2006

March, 2006 -- Rev. 3

1

Publication Order Number:

MC74VHC540/D

MC74VHC540

PIN ASSIGNMENT

A5

A3

A2

A1

OE1

GND

A8

A7

A6

A4

5

4

3

2

1

10

9

8

7

6

14

15

16

17

18

19

20

11

12

13

Y3

Y2

Y1

OE2

Y8

Y7

Y6

Y5

Y4

L

L

H

X

L

L

X

H

L

H

X

X

FUNCTION TABLE

Inputs

Output Y

OE1

OE2

A

H

L

Z

Z

DW SUFFIX

20--LEAD SOIC WIDE PACKAGE

CASE 751D--05

ORDERING INFORMATION

MC74VHCXXXDW

MC74VHCXXXDT

MC74VHCXXXM

SOIC WIDE

TSSOP

SOIC EIAJ

DT SUFFIX

20--LEAD TSSOP PACKAGE

CASE 948E--02

M SUFFIX

20--LEAD SOIC EIAJ PACKAGE

CASE 967--01