FST16209 ,18-Bit Bus Exchange SwitchFeaturesThe Fairchild Switch FST16209 provides 18-bits of high-
FST16209
18-Bit Bus Exchange Switch
FST16209 18-Bit Bus Exchange Switch September 1997 Revised December 1999 FST16209 18-Bit Bus Exchange Switch General Description Features The Fairchild Switch FST16209 provides 18-bits of high-4Ω switch connection between two ports. speed CMOS TTL-compatible bus switching or exchang-Minimal propagation delay through the switch. ing. The low on resistance of the switch allows inputs to be Low l . CC connected to outputs without adding propagation delay or Zero bounce in flow-through mode. generating additional ground bounce noise. Control inputs compatible with TTL level. The device operates as a 18-bit bus switch or a 9-bit bus exchanger, which allows data exchange between the four signal ports via the data-select terminals. Ordering Code: Order Number Package Number Package Description FST16209MEA MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide FST16209MTD MTD48 48-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 S1 S0 A A Function 1 2 L L L Z Z Disconnect LL H BZA = B 1 1 1 LH L BZA = B 2 1 2 Pin Descriptions LH H Z B A = B 1 2 1 HL L Z B A = B Pin Name Description 2 2 2 H L H Z Z Disconnect S2, S1, S0 Data-select inputs HH L B B A = B , A = B A , A Bus A 1 2 1 1 2 2 1 2 HHH B B A = B , A = B B , B Bus B 2 1 1 2 2 1 1 2 © 1999 DS500056
