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FST3244WM Scheda tecnica(PDF) 1 Page - Fairchild Semiconductor |
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FST3244WM Scheda tecnica(HTML) 1 Page - Fairchild Semiconductor |
1 / 5 page © 2005 Fairchild Semiconductor Corporation DS500021 www.fairchildsemi.com June 1997 Revised January 2005 FST3244 8-Bit Bus Switch General Description The Fairchild Switch FST3244 provides 8-bits of high- speed CMOS TTL-compatible bus switching in a standard ’244 pin-out. The low on resistance of the switch allows inputs to be connected to outputs without adding propaga- tion delay or generating additional ground bounce noise. The device is organized as two 4-bit switches with separate OE inputs. When OE is LOW, the switch is ON and Port A is connected to Port B. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. Features ■ 4 : switch connection between two ports. ■ Minimal propagation delay through the switch. ■ Low lCC. ■ Zero bounce in flow-through mode. ■ Control inputs compatible with TTL level. Ordering Code: 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 Pin Descriptions Connection Diagram Truth Table Order Number Package Number Package Description FST3244WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide FST3244QSC MQA20 20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide FST3244MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide FST3244MTCX_NL (Note 1) MTC20 Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Pin Name Description OE1, OE2 Bus Switch Enable 1A, 2A Bus A 1B, 2B Bus B Inputs Inputs/Outputs OE1 OE2 1A, 1B 2A, 2B LL 1A 1B 2A 2B LH 1A 1B Z HL Z 2A 2B HH Z Z |
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