© 2001 Fairchild Semiconductor Corporation

DS500419

www.fairchildsemi.com

April 2001

Revised April 2001

FST16245

16-Bit Bus Switch

General Description

The Fairchild Switch FST16245 provides 16-bits of high-

speed CMOS TTL-compatible bus switching. 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 a 16-bit switch. There are two

8-bit switches with separate output enable inputs. When

OE is LOW, the switch is ON and Port a is connected to

Port B. When OE is HIGH, the switch is OFF and a high

impedance state exists between the A and B Ports.

Features

I 4

Ω switch connection between two ports.

I Minimal propagation delay through the switch.

I Zero bounce in flow-through mode.

I 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.

Connection Diagram

Pin Descriptions

Logic Diagram

Truth Table

H

= HIGH Voltage Level

L

= LOW Voltage Level

Z

= High Impedance

Order Number

Package Number

Package Description

FST16245MTD

MTD48

48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Pin Name

Description

Output Enable Input (Active LOW)

Bus A

Bus B

NC

No Internal Connection

Inputs

Outputs

A, B

LA Port

= B Port

HZ