© 1999 Fairchild Semiconductor Corporation

DS010904

www.fairchildsemi.com

January 1991

Revised August 1999

74FR2240

Octal Buffer/Line Driver

with 25

Ω Series Resistors in the Outputs

General Description

The

74FR2240 is an inverting octal buffer and line driver

designed to drive capacitive inputs of MOS memory

devices, address and clock lines or act as a low under-

shoot general purpose bus driver.

Features

s 3-STATE outputs drive bus lines or buffer memory

address registers

s Outputs sink 12 mA and source 15 mA

s 25

Ω series resistors in outputs eliminate the need for

external resistors

s Designed to drive the capacitive inputs of MOS devices

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Pin Descriptions

Truth Tables

H

= HIGH Voltage Level

L

= LOW Voltage Level

X

= Immaterial

Z

= High Impedance

Order Number

Package Number

Package Description

74FR2240SC

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

74FR2240PC

N20A

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Pin Names

Description

Output Enable Input (Active-LOW)

Inputs

Outputs

Inputs

Outputs

(Pins 12, 14, 16, 18)

LL

H

LH

L

HX

Z

Inputs

Outputs

(Pins 3, 5, 7, 9)

LL

H

LH

L

HX

Z