FST3345 ,8-Bit Bus SwitchFeaturesThe Fairchild Switch FST3345 provides 8-bits of high-
FST3345
8-Bit Bus Switch
FST3345 8-Bit Bus Switch June 1997 Revised December 1999 FST3345 8-Bit Bus Switch General Description Features The Fairchild Switch FST3345 provides 8-bits of high-4Ω switch connection between two ports. speed CMOS TTL-compatible bus switching. The low onMinimal propagation delay through the switch. resistance of the switch allows inputs to be connected to Low l . CC outputs without adding propagation delay or generating Zero bounce in flow-through mode. additional ground bounce noise. Control inputs compatible with TTL level. 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. 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 Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Diagram Connection Diagram Pin Descriptions Truth Table Pin Name Description Inputs Function OE, OE Bus Switch Enables OE OE ABus A X L Connect BBus B H X Connect L H Disconnect © 1999 DS500019
