FST3257MX ,Quad 2:1 Multiplexer/Demultiplexer Bus SwitchFeaturesThe Fairchild Switch FST3257 is a quad 2:1 high-speed
FST3257M-FST3257MTC-FST3257MTCX-FST3257MX-FST3257MX_NL-FST3257QSCX
Quad 2:1 Multiplexer/Demultiplexer Bus Switch
FST3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch September 1997 Revised December 1999 FST3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch General Description Features The Fairchild Switch FST3257 is a quad 2:1 high-speed4Ω switch connection between two ports. CMOS TTL-compatible multiplexer/demultiplexer busMinimal propagation delay through the switch. switch. The low on resistance of the switch allows inputs to Low l . CC be connected to outputs without adding propagation delay Zero bounce in flow-through mode. or generating additional ground bounce noise. Control inputs compatible with TTL level. When OE is LOW, the select pin connects the A Port to the selected B Port output. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. Ordering Code: Order Number Package Number Package Description FST3257M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow FST3257QSC MQA16 16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide FST3257MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Diagram Connection Diagram Pin Descriptions Truth Table Pin Name Description SOE Function OE Bus Switch Enable X H Disconnect S Select Input LL A = B ABus A 1 B –B Bus B HL A = B 1 2 2 © 1999 DS500057
