Definition: The term "fsac2" refers to a specific type of semiconductor found in integrated circuits. In its most basic form, this term corresponds to a 2N700F4351FSAC (Forth Semiconductor) device. This device is a high-speed asynchronous logic circuit that consists of two NPN transistors connected in series with a fast reset voltage and an asynchronous pull-up resistor. The word "fsac" is short for Fast Synchro Logic Array (Fast Sync LoaD), which refers to the use of FLCs (Forth Lightning Circuits) within logic circuits. The "2N700F4351FSAC" refers to a specific type of FLC that has been developed and tested extensively in various semiconductor manufacturing facilities. The term "fsac2" specifically refers to a variant or subcomponent of this FLC, which is an advanced version designed for high-speed asynchronous logic circuits. The device is characterized by a lower operating temperature (FSAC) and a higher clock speed (1.33 MHz), making it ideal for applications requiring high-speed asynchronous logic. The detailed definition would typically include details like its size, performance specifications such as clock rate and voltage drop, and the materials used to manufacture it, all of which contribute to its characteristics and potential use cases in integrated circuits.