FSTU3257QSCX ,Quad 2:1 Multiplexer/Demultiplexer Bus Switch with -2V Undershoot ProtectionElectrical CharacteristicsV T = −40 °C to +85 °CCC ASymbol Parameter Units ConditionsMin Typ Max(V) ..
FSTU3257QSCX ,Quad 2:1 Multiplexer/Demultiplexer Bus Switch with -2V Undershoot ProtectionFSTU3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch with −2V Undershoot ProtectionAugust 1999Rev ..
FSTU32X384 ,20-Bit Low Power Bus Switch with -2V Undershoot ProtectionFeaturesThe Fairchild Switch FSTU32X384 provides 20 bits of high-
FSTU3257MTCX-FSTU3257MX-FSTU3257QSC-FSTU3257QSCX
Quad 2:1 Multiplexer/Demultiplexer Bus Switch with -2V Undershoot Protection
FSTU3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch with −2V Undershoot Protection August 1999 Revised December 2000 FSTU3257 Quad 2:1 Multiplexer/Demultiplexer Bus Switch with −2V Undershoot Protection General Description Features The Fairchild Switch FSTU3257 is a quad 2:1 high-speedUndershoot hardened to −2V (A and B Ports) CMOS TTL-compatible multiplexer/demultiplexer busSoft enable turn-on to minimize bus to bus charge switch. The low on resistance of the switch allows inputs to sharing during enable be connected to outputs without adding propagation delay 4Ω switch connection between two ports. or generating additional ground bounce noise. Minimal propagation delay through the switch. When OE is LOW, the select pin connects the A Port to the Low l . selected B Port output. The A and B Ports are “undershoot CC hardened” with Undershoot Hardened Circuit (UHC) pro-Zero bounce in flow-through mode. tection to support an extended range of 2.0V below Control inputs compatible with TTL level. ground. Fairchild’s integrated UHC senses undershoot at See Applications Note AN-5008 for details the I/O and responds by preventing voltage differentials from developing and turning on the switch. 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 FSTU3257M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow FSTU3257QSC MQA16 16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide FSTU3257MTC 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 X H Disconnect OE Bus Switch Enable LL A = B S Select Input 1 HL A = B ABus A 2 B –B Bus B 1 2 UHC is a trademark of . © 2000 DS500302
