The FST3257 is a quad 2:1 high-speed CMOS TTL-compatible multiplexer / demultiplexer bus switch produced by Fairchild company. It has the features of 4Ω switch connection between two ports, minimal propagation delay through the switch, low ICC, zero bounce in flow-through node control inputs compatible with TTL level
The Fairchild Semiconductor FST3257 is a high-speed CMOS TTL-compatible quad 2:1 multiplexer/demultiplexer bus switch. It allows four independent connections between two ports with minimal propagation delay and zero bounce in flow-through nodes. The device features low quiescent supply current (ICC) and control inputs compatible with standard TTL levels.
| Operating Temperature Range | -40 to +85°C |
|---|---|
| Switch On Resistance | 4 Ω typical at 64mA |
| Quiescent Supply Current (ICC) | 3 µA typical |
| Propagation Delay | 0.25 ns max (Bus to Bus) |
The switch connects A port to B port when /OE is LOW.
The switch enters an OPEN state with a high-impedance condition between ports.
Yes, the control inputs are compatible with TTL levels.