© Semiconductor Components Industries, LLC, 2014

August, 2014 − Rev. 15

1

Publication Order Number:

MC74HC244A/D

MC74HC244A

Octal 3-State Noninverting

Buffer/Line Driver/

Line Receiver

High−Performance Silicon−Gate CMOS

The MC74HC244A is identical in pinout to the LS244. The device

inputs are compatible with standard CMOS outputs; with pullup

resistors, they are compatible with LSTTL outputs.

This octal noninverting buffer/line driver/line receiver is designed

to be used with 3−state memory address drivers, clock drivers, and

other bus−oriented systems. The device has noninverting outputs and

two active−low output enables.

The HC244A is similar in function to the HC240A.

Features

No. 7 A

Unique Site and Control Change Requirements; AEC−Q100

Qualified and PPAP Capable

Compliant

LOGIC DIAGRAM

DATA

INPUTS

A1

A2

A3

A4

B1

B2

B3

B4

17

15

13

11

8

6

4

218

16

14

12

9

7

5

3

YB4

YB3

YB2

YB1

YA4

YA3

YA2

YA1

NONINVERTING

OUTPUTS

PIN 10 = GND

OUTPUT

ENABLES

ENABLE A

ENABLE B

1

19

http://onsemi.com

See detailed ordering and shipping information in the package

dimensions section on page 5 of this data sheet.

ORDERING INFORMATION

1

20

MARKING DIAGRAMS

SOIC−20

DW SUFFIX

CASE 751D

HC244A

AWLYYWWG

HC

244A

ALYW

G

G

TSSOP−20

DT SUFFIX

CASE 948E

20

1

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W

= Work Week

G or

G

= Pb−Free Package

(*Note: Microdot may be in either location)

SOIC−20

TSSOP−20

PIN ASSIGNMENT

A3

A2

YB4

A1

ENABLE A

GND

YB1

A4

YB2

YB3

5

4

3

2

1

10

9

8

7

6

14

15

16

17

18

19

20

11

12

13

YA2

B4

YA1

ENABLE B

B1

YA4

B2

YA3

B3

FUNCTION TABLE

Inputs

Outputs

Enable A,

Enable B

A, B

YA, YB

LL

L

LH

H

HX

Z

Z = high impedance