FST3253M

FST3253 Dual 4:1 Multiplexer/Demultiplexer Bus Switch September 1997 Revised December 1999 FST3253 Dual 4:1 Multiplexer/Demultiplexer Bus Switch General Description The Fairchild Switch FST3253 is a dual 4:1 high-speed CMOS TTL-compatible multiplexer/demultiplexer bus switch. The low on resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. When OE is LOW, S0 and S1 connect the A Port to the selected B Port output. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. Features s 4Ω 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 FST3253M FST3253QSC FST3253MTC Package Number M16A MQA16 MTC16 Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Diagram Connection Diagram Truth Table Pin Descriptions Pin Name OE1, OE2 S0 , S1 A B1 , B2 , B3 , B4 Description Bus Switch Enables Select Inputs Bus A Bus B S1 X X L L H H S0 X X L H L H OE1 H X L L L L OE2 X H L L L L Function Disconnect 1A Disconnect 2A A = B1 A = B2 A = B3 A = B4 © 1999 Fairchild Semiconductor Corporation DS500058 www.fairchildsemi.com FST3253 Absolute Maximum Ratings(Note 1) Supply Voltage (VCC ) DC Switch Voltage (VS) DC Input Voltage (VIN)(Note 2) DC Input Diode Current (lIK) VIN