FST33X257QSP

FST33X257 24:12 Multiplexer/Demultiplexer Bus Switch May 2002 Revised July 2002 FST33X257 24:12 Multiplexer/Demultiplexer Bus Switch 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 OEx 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 s 4Ω switch connection between two ports s Minimal propagation delay through the switch s Low lCC s Zero bounce in flow-through mode s Control inputs compatible with TTL level Ordering Code: Order Number FST33X257QSP Package Number MQA48A Package Description 48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. © 2002 Fairchild Semiconductor Corporation DS500724 www.fairchildsemi.com FST33X257 Logic Diagram Connection Diagram Pin Descriptions Pin Name OEx Sx A B1–B2 Description Bus Switch Enable Select Input Bus A Bus B Truth Table Sx X L H OEx H L L Function Disconnect A = B1 A = B2 www.fairchildsemi.com 2 FST33X257 Absolute Maximum Ratings(Note 1) Supply Voltage (VCC) DC Switch Voltage (VS) DC Input Voltage (VIN)(Note 2) DC Input Diode...