© 1999 Fairchild Semiconductor Corporation

DS009530

www.fairchildsemi.com

October 1988

Revised August 1999

74F2243

Quad Bus Transceiver

with 25

Ω Series Resistors in the Outputs

General Description

The 74F2243 is a quad bus transmitter/receiver which can

be used for 4-line asynchronous 2-way data communica-

tions between data busses. It is designed to drive the

capacitive inputs of MOS memory drivers, address drivers,

clock drivers, and bus-oriented transmitters/receivers.

The 25

Ω series resistors in the outputs reduce ringing and

eliminate the need for external resistors.

Features

s 25

Ω series resistors in outputs eliminate the need for

external resistors

s 2-Way asynchronous data bus communication

s 3-STATE outputs

s 12 mA source current

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.

Logic Symbol

IEEE/IEC

Connection Diagram

Truth Table

H

= HIGH Voltage Level

Z

= High Impedance

L

= LOW Voltage Level

N/A

= Not Allowed

Unit Loading/Fan Out

Order Number

Package Number

Package Description

74F2243SC

M14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow

Inputs

Inputs/Outputs

LL

Input

B

= A

LH

N/A

N/A

HL

Z

Z

HH

A

= B

Input

Pin Names

Description

U.L.

HIGH/LOW

Enable Input (Active LOW)

1.0/1.67

20

µA/−1 mA

Enable Input (Active HIGH)

1.0/1.67

20

µA/−1 mA

Inputs

3.5/2.67

70

µA/−1.6 mA

Outputs

750/20

−15 mA/12 mA