资 源 简 介
The x92FCT157T devices are quad two-input mulTIplexers that select four bits of data from two sources under the control of a common data-select (S) input. The output-enable (E) input is acTIve low. When E is high, all of the outputs (Y) are forced low, regardless of all other input condiTIons.
Moving data from two groups of registers to four common output buses is a common use of the x92FCT157T devices. The state of S determines the parTIcular register from which the data comes. It also can be used as a function generator. These devices are useful for implementing highly irregular logic by generating any 4 of the 16 different functions of 2 variables, with 1 variable common.
The x92FCT157T devices are logic implementations of a four-pole, two-position switch, where the position of the switch is determined by the logic levels at S.
