FST3244 ,8-Bit Bus SwitchFST3244 8-Bit Bus SwitchJune 1997Revised December 2000FST32448-Bit Bus Switch
FST3244MTC ,8-Bit Bus SwitchFeaturesThe Fairchild Switch FST3244 provides 8-bits of high- 4
FST3244
8-Bit Bus Switch
FST3244 8-Bit Bus Switch June 1997 Revised December 2000 FST3244 8-Bit Bus Switch General Description Features The Fairchild Switch FST3244 provides 8-bits of high-4Ω switch connection between two ports. speed CMOS TTL-compatible bus switching in a standardMinimal propagation delay through the switch. ’244 pin-out. The low on resistance of the switch allows Low l . CC inputs to be connected to outputs without adding propaga- Zero bounce in flow-through mode. tion delay or generating additional ground bounce noise. Control inputs compatible with TTL level. 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. Ordering Code: 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 Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Diagram Connection Diagram Truth Table Inputs Inputs/Outputs OE OE 1A, 1B 2A, 2B 1 2 LL 1A = 1B 2A = 2B Pin Descriptions LH 1A = 1B Z Pin Name Description HL Z 2A = 2B OE , OE Bus Switch Enable 1 2 HH Z Z 1A, 2A Bus A 1B, 2B Bus B © 2000 DS500021
