MC74HC540A

http://onsemi.com

2

Figure 1. Pinout: 20−Lead Packages (Top View)

19

20

18

17

16

15

14

2

1

3

45

67

13

8

12

9

11

10

OE2

Y1

Y2

Y3

Y4

Y5

Y6

Y7

Y8

OE1

A1

A2

A3

A4

A5

A6

A7

A8

GND

L

L

H

X

L

L

X

H

L

H

X

X

FUNCTION TABLE

Inputs

Output Y

OE1

OE2

A

H

L

Z

Z

Z = High Impedance

X = Don’t Care

Figure 2. Logic Diagram

18

Y1

2

A1

17

Y2

3

A2

16

Y3

4

A3

15

Y4

5

A4

14

Y5

6

A5

13

Y6

7

A6

12

Y7

8

A7

11

Y8

9

A8

OE1

OE2

1

19

Output

Enables

Data

Inputs

Inverting

Outputs

PIN 10 = GND

ORDERING INFORMATION

Device

Package

MC74HC540AN

PDIP−20

18 Units / Rail

MC74HC540ANG

PDIP−20

(Pb−Free)

18 Units / Rail

MC74HC540ADW

SOIC−20 WIDE

38 Units / Rail

MC74HC540ADWG

SOIC−20 WIDE

(Pb−Free)

38 Units / Rail

MC74HC540ADWR2

SOIC−20 WIDE

1000 Tape & Reel

MC74HC540ADWR2G

SOIC−20 WIDE

(Pb−Free)

1000 Tape & Reel

MC74HC540ADTR2

TSSOP−20*

2500 Tape & Reel

MC74HC540ADTR2G

TSSOP−20*

2500 Tape & Reel

MC74HC540AF

SOEIAJ−20

40 Units / Rail

MC74HC540AFG

SOEIAJ−20

(Pb−Free)

40 Units / Rail

MC74HC540AFEL

SOEIAJ−20

2000 Tape & Reel

MC74HC540AFELG

SOEIAJ−20

(Pb−Free)

2000 Tape & Reel

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

*This package is inherently Pb−Free.