General Description

The Fairchild Switch FST33X257 is a 24:12 high-speed CMOS TTL-compatible multiplexer/demultiplexer bus switch. The low On Resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise.

When OE x is LOW, the select pin connects the A Port to the selected B Port output. When OEx is HIGH, the switch is OPEN and a high-impedance state exists between the two ports.

Features

■ 4Ω 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