FSTU16861 Datasheet | Fairchild Semiconductor

FSTU16861 20-Bit Bus Switch with - 2V Undershoot Protection May 2001 Revised May 2001 FSTU16861 20-Bit Bus Switch with - 2V Undershoot Protection General Description The Fairchild Switch FSTU16861 provides 20-Bits of highspeed CMOS TTL-patible bus switching. 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 is organized as a 10-bit or 20-Bit bus switch. When OE1 is LOW, the switch is ON and Port 1A is connected to Port 1B. When OE2 is LOW, Port 2A is connected to Port 2B. When OEX is HIGH, a high impedance state exists between the A and B Ports. The A and B Ports are protected against undershoot to support an extended range to 2.0V below ground. Fairchild’s integrated Undershoot Hardened Circuit (UHC) senses undershoot at the I/O and responds by preventing voltage differentials from developing and turning the switch on. When OE is HIGH, the switch is OPEN and a high-impedance state exists between the two ports. Features s Undershoot hardened to - 2V (A and B Ports) s 4Ω switch connection between two ports s Minimal propagation delay through the switch s Low l CC s Zero bounce in flow-through mode s Control inputs patible with TTL level s See Application Note AN-5008 for details Ordering Code: Order Number FSTU16861MTD Package Number MTD48 Package Description 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. UHC is a trademark of Fairchild Semiconductor Corporation. © 2001 Fairchild Semiconductor Corporation DS500422 .fairchildsemi. Connection Diagram Logic Diagram Pin Descriptions Pin Name OE1, OE2 1An, 2An 1Bn, 2Bn Description Bus Switch Enables Bus A Bus B Truth Table Inputs OE1 L L H H OE2 L H L H Inputs/Outputs 1A, 1B 1A = 1B 1A = 1B Z Z 2A, 2B 2A = 2B Z 2A = 2B Z H = HIGH Voltage...