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FSTU32X800QSP Scheda tecnica(PDF) 1 Page - Fairchild Semiconductor |
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FSTU32X800QSP Scheda tecnica(HTML) 1 Page - Fairchild Semiconductor |
1 / 5 page © 2002 Fairchild Semiconductor Corporation DS500791 www.fairchildsemi.com November 2002 Revised October 2006 FSTU32X800 20-Bit Bus Switch with Precharged Outputs and −2V Undershoot Protection General Description The Fairchild Switch FSTU32X800 provides 20-bits of high-speed CMOS TTL-compatible bus switching. The low On Resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. The A and B Ports are protected against undershoot to support an extended range to 2.0V below ground. Fairchild’s integrated Under- shoot Hardened Circuit (UHC®) senses undershoot at the I/O and responds by preventing voltage differentials from developing and turning the switch on. The device also pre- charges the B Port to a selectable bias voltage (BiasV) to minimize live insertion noise. The device is organized as two 10-bit switches with a bus enable (OEn) signal. When OEn is LOW, the switch is ON and Port A is connected to Port B. When OEn is HIGH, the switch is OPEN and the B Port is precharged to BiasV through an equivalent 10-k Ω resistor. Features s 4 Ω switch connection between two ports s Undershoot Hardened to -2.0V s Soft enable turn-on to minimize bus-to-bus charge sharing during enable s Low lCC s Zero bounce in flow-through mode s Output precharge to minimize live insertion noise s Control inputs compatible with TTL level s See Applications Note AN-5008 for details Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. UHC® is a registered trademark of Fairchild Semiconductor Corporation. Order Number Package Number Package Description FSTU32X800QSP MQA48A 48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide |
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