FST16861 datasheet(2/6 Pages) ONSEMI

2 / 6 page

DS500318

www.fairchildsemi.com

March 2000

Revised June 2005

FST16861

20-Bit Bus Switch

General Description

The Fairchild Switch FST16861 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.

When OE1 is LOW, the switch is ON and Port 1A is con-

nected to Port 1B. When OE2 is LOW, Port 2A is connected

to Port 2B. When OEX is HIGH, a high impedance state

exists between the A and B Ports.

Features

■ 4

: switch connection between two ports

■ Minimal propagation delay through the switch

■ Low lCC

■ Zero bounce in flow-through mode

■ 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

Truth Table

Connection Diagram

Pin Descriptions

Order Number

Package Number

Package Description

FST16861MTD

MTD48

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

Inputs

Inputs/Outputs

OE1

OE2

1A, 1B

2A, 2B

Pin Name

Description

OE1, OE2

Bus Switch Enables

1A, 2A

Bus A

1B, 2B

Bus B

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