© 1999 Fairchild Semiconductor Corporation

DS500193

www.fairchildsemi.com

November 1998

Revised December 1999

FST16210

20-Bit Bus Switch

General Description

The Fairchild Switch FST16210 provides 20-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 10-bit or 20-Bit bus switch.

to Port 2B.

Features

s 4

Ω switch connection between two ports.

s Minimal propagation delay through the switch.

s Zero 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.

Connection Diagram

Pin Descriptions

Logic Diagram

Truth Table

Order Number

Package Number

Package Description

FST16210MTD

MTD48

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

Pin Name

Description

Bus Switch Enables

1A, 2A

Bus A

1B, 2B

Bus B

Inputs

Inputs/Outputs

1A, 1B

2A, 2B

LL

1A

= 1B

2A

= 2B

LH

1A

= 1B

Z

HL

Z

2A

= 2B

HH

Z

Z