The FST3125 is a 4-bit bus switch with a 4Ω switch connection and minimal propagation delay. Its control inputs are compatible with TTL levels.
The Fairchild FST3125 is a high-speed CMOS TTL-compatible bus switch organized as four one-bit switches with separate /OE inputs. It connects two ports (A to B) when the enable input is LOW, or places them in a high-impedance state when HIGH. The device features minimal propagation delay and zero bounce in flow-through mode.
| Number of Switches | Four 1-bit switches |
|---|---|
| Operating Temperature Range | -40 to +85 °C |
| Supply Voltage (Recommended) | 4.0 to 5.5 V |
The switch connects port A to port B when /OE is LOW.
The switch opens and a high-impedance state exists between the two ports.
Yes, it is described as CMOS TTL-compatible.