FSTU3253

FSTU3253 Dual 4:1 Multiplexer/Demultiplexer Bus Switch with −2V Undershoot Protection August 2001 Revised September 2001 FSTU3253 Dual 4:1 Multiplexer/Demultiplexer Bus Switch with −2V Undershoot Protection General Description The Fairchild Switch FSTU3253 is a dual 4:1 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 is LOW, S0 and S1 connect 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. The A and B Ports are protected against undershoot to support an extended range to 2.0V below ground. Fairchild’s integrated Undershoot Hardened Circuit (UHC) senses undershoot at the I/O and responds by preventing voltage differentials from developing and turning the switch on. Features s Undershoot hardened to −2.0V 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 s See application note AN-5008 and AN-5021 for details on undershoot Ordering Code: Order Number FSTU3253M FSTU3253QSC FSTU3253MTC Package Number M16A MQA16 MTC16 Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow 16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide 16-...