© Semiconductor Components Industries, LLC, 2001

May, 2001 – Rev. 5

1

Publication Order Number:

MC74AC244/D

MC74AC244, MC74ACT244

Octal Buffer/Line Driver

with 3-State Outputs

The MC74AC244/74ACT244 is an octal buffer and line driver

designed to be employed as a memory address driver, clock driver

and bus oriented transmitter/receiver which provides improved PC

board density.

Registers

19

20

18

17

16

15

14

2

1

34567

VCC

13

8

12

9

11

10

OE2

OE1

GND

Figure 1. Pinout: 20–Lead Packages Conductors

(Top View)

TRUTH TABLE

Inputs

Outputs

OE1

D

(Pins 12, 14, 16, 18)

L

L

L

L

H

H

H

X

Z

NOTE:

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

TRUTH TABLE

Inputs

Outputs

OE2

D

(Pins 3, 5, 7, 9)

L

L

L

L

H

H

H

X

Z

NOTE:

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

http://onsemi.com

1

20

PDIP–20

N SUFFIX

CASE 738

1

20

1

20

1

20

SO–20

DW SUFFIX

CASE 751

TSSOP–20

DT SUFFIX

CASE 948E

EIAJ–20

M SUFFIX

CASE 967

Device

Package

Shipping

ORDERING INFORMATION

MC74AC244N

PDIP–20

18 Units/Rail

MC74ACT244N

PDIP–20

18 Units/Rail

MC74AC244DW

SOIC–20

38 Units/Rail

MC74AC244DWR2

SOIC–20

1000 Tape & Reel

MC74ACT244DW

SOIC–20

38 Units/Rail

MC74ACT244DWR2

SOIC–20

1000 Tape & Reel

MC74AC244DT

TSSOP–20

75 Units/Rail

MC74AC244DTR2

TSSOP–20

2500 Tape & Reel

MC74ACT244DT

TSSOP–20

75 Units/Rail

MC74ACT244DTR2

TSSOP–20

2500 Tape & Reel

MC74AC244M

EIAJ–20

40 Units/Rail

MC74AC244MEL

EIAJ–20

2000 Tape & Reel

MC74ACT244M

EIAJ–20

40 Units/Rail

MC74ACT244MEL

EIAJ–20

2000 Tape & Reel

See general marking information in the device marking

section on page 5 of this data sheet.

DEVICE MARKING INFORMATION