This document introduces Fairchild Switch products, which are switches used to achieve signal isolation and voltage translation. They consume very little power and can perform high-speed switching operations.
This document provides an introduction to Fairchild Semiconductor's FST (Fairchild Switch) Bus Switch products. It explains how these devices address system design challenges in modular architectures by providing bus isolation, voltage translation, and basic logic functions such as multiplexing and bus exchange. Unlike standard logic devices, FST bus switches do not add signal propagation delay or increase power consumption when the switch is open.
| ON Resistance (typical) | < 5 Ω |
|---|---|
| Propagation Delay | < 250 ps |
| Threshold Voltage (VTN) | ~1V |
It is a logic device designed for applications that require simple logic functions, bus isolation, and/or voltage translation without adding signal delay or power.
When the device is OPEN or OFF, it consumes no power and provides high impedance isolation between terminals.
The device acts as a low-impedance resistor with an ON resistance typically less than 5 Ω.