PDF FST3345WM Data sheet ( Hoja de datos )

Número de pieza	FST3345WM
Descripción	8-Bit Bus Switch
Fabricantes	Fairchild Semiconductor
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No Preview Available ! June 1997 Revised March 2005 FST3345 8-Bit Bus Switch General Description The Fairchild Switch FST3345 provides 8-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 device is organized as an 8-bit switch bank with dual output enable inputs (OE and OE). When OE is LOW or OE is HIGH, the switch is ON and Port A is connected to Port B. When OE is HIGH and OE is LOW, the switch is OPEN and a high-impedance state exists between the two ports. Features s 4: 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 Package Number Package Description FST3345WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide FST3345QSC MQA20 20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide FST3345MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide FST3345MTCX_NL MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm (Note 1) Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Note 1: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only. Logic Diagram Connection Diagram Pin Descriptions Pin Name OE, OE A B Description Bus Switch Enables Bus A Bus B Truth Table Inputs OE OE XL HX LH Function Connect Connect Disconnect © 2005 Fairchild Semiconductor Corporation DS500019 www.fairchildsemi.com 1 page Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20 Technology Description The Fairchild Switch family derives from and embodies Fairchild’s proven switch technology used for several years in its 74LVX3L384 (FST3384) bus switch product. Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be rea- sonably expected to result in a significant injury to the user. 2. A critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 5 www.fairchildsemi.com 5 Page

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