© 1999 Fairchild Semiconductor Corporation

DS500046

www.fairchildsemi.com

September 1997

Revised December 1999

Print form created on December 13, 1999 4:03

FST3384

10-Bit Low Power Bus Switch

General Description

The Fairchild Switch FST3384 provides 10 bits of high-

speed CMOS TTL-compatible bus switches. The low on

resistance of the switch allows inputs to be connected to

outputs without adding propagation delay or generating

additional ground bounce noise. The device is organized

as two 5-bit switches with separate bus enable (OE) sig-

nals. When OE is LOW, the switch is ON and Port A is con-

nected to Port B. When OE is HIGH, the switch is OPEN

and a high-impedance state exists between the two ports.

Features

s 4

Ω switch connection between two ports

s Minimal propagation delay through the switch

s Ultra low power with

< 0.1 µA typical I

CC

s Zero ground bounce in flow-through mode

s Control inputs compatible with TTL level

Ordering Code:

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

Logic Diagram

Pin Descriptions

Connection Diagram

Truth Table

Order Number

Package Number

Package Description

FST3384WM

M24B

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

FST3384QSC

MQA24

24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide

FST3384MTC

MTC24

24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Pin Names

Description

OEA, OEB

Bus Switch Enable

Bus A

Bus B

Function

LL

Connect

LH

HIGH-Z State

Connect

H

L

HIGH-Z State

Connect

H

H

HIGH-Z State

HIGH-Z State

Disconnect