FST16212

FST16212 24-Bit Bus Exchange Switch July 1997 Revised December 1999 FST16212 24-Bit Bus Exchange Switch General Description The Fairchild Switch FST16212 provides 24-bits of highspeed CMOS TTL-compatible bus switching or exchanging. 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 operates as a 24-bit bus switch or a 12-bit bus exchanger, which allows data exchange between the four signal ports via the data-select terminals. 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 FST16212MEA FST16212MTD Package Number MS56A MTD56 Package Description 56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300 Wide 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm 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 S2 L L L L H H H H S1 L L H H L L H H S0 L H L H L H L H A1 Z B1 B2 Z Z Z B1 B2 A2 Z Z Z B1 B2 Z B2 B1 Function Disconnect A1 = B1 A1 = B2 A2 = B1 A2 = B2 Disconnect A1 = B1, A2 = B2 A1 = B2, A2 = B1 Pin Descriptions Pin Name S2, S1, S0 A1, A2 B1, B2 Description Data-select inputs Bus A Bus B © 1999 Fairchild Semiconductor Corporation DS500038 www.fairc...