FST16211 24-Bit Bus Switch July 1997 Revised July 2002 FST16211 24-Bit Bus Switch General Description Features The Fairchild Switch FST16211 provides 24-bits of high- 4 switch connection between two ports speed CMOS TTL-compatible bus switching. The low On Minimal propagation delay through the switch Resistance of the switch allows inputs to be connected to Low l CC outputs without adding propagation delay or generating Zero bounce in flow-through mode additional ground bounce noise. Control inputs compatible with TTL level The device is organized as a 12-bit or 24-bit bus switch. When OE is LOW, the switch is ON and Port 1A is con- Also packaged in plastic Fine-Pitch Ball Grid Array 1 (FBGA) nected to Port 1B. When OE is LOW, Port 2A is connected 2 to Port 2B. When OE is HIGH, a high impedance state 1/2 exists between the A and B Ports. Ordering Code: Order Number Package Number Package Description FST16211G BGA54A 54-Ball Fine-Pitch Ball Grid Array (FBGA), JEDEC MO-205, 5.5mm Wide (Note 1)(Note 2) FST16211MEA MS56A 56-Lead Shrink Small Outline Package (SSOP), JEDEC MO-118, 0.300 Wide (Note 2) FST16211MTD MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide (Note 2) Note 1: Ordering code G indicates Trays. Note 2: Devices also available in Tape and Reel. Specify by appending the suffix letter X to the ordering code. Logic Diagram 2002 Fairchild Semiconductor Corporation DS500037 www.fairchildsemi.comConnection Diagrams Pin Descriptions Pin Name Description Pin Assignment for SSOP and TSSOP OE , OE Bus Switch Enables 1 2 1A, 2A Bus A 1B, 2B Bus B FBGA Pin Assignments 1 234 56 A 1A 1A NC OE 1B 1B 2 1 2 1 2 B 1A 1A 1A OE 1B 1B 4 3 7 1 3 4 C 1A 1A GND 1B 1B 1B 6 5 7 5 6 D 1A 1A 1A 1B 1B 1B 10 9 8 8 9 10 E 1A 1A 2A 2B 1B 1B 12 11 1 1 11 12 F 2A 2A 2A 2B 2B 2B 4 3 2 2 3 4 G 2A 2A V GND 2B 2B 6 5 CC 5 6 H 2A 2A 2A 2B 2B 2B 8 7 9 9 7 8 J 2A 2A 2A 2B 2B 2B 12 11 10 10 11 12 Truth Table Inputs Inputs/Outputs OE OE 1A, 1B 2A, 2B 1 2 LL 1A = 1B 2A = 2B LH 1A = 1B Z HL Z 2A = 2B Pin Assignment for FBGA HH Z Z (Top Thru View) www.fairchildsemi.com 2 FST16211