The FST16210 is a 20-bit high-speed CMOS TTL-compatible bus switch with low switch resistance, which 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.