PHILIPS 74HC/HCT158 handbook

This document describes a quad 2-input multiplexer called 74HC/HCT158, which has an inverting data path and standard output capability. It can select 4 bits of data from two sources and is controlled by a common data select input (S). The four outputs present the selected data in the inverted form. Moving the data from two groups of registers to four common output buses is a common use of the '158'. It can also be used as a function generator, allowing the implementation of highly irregular logic. The product complies with JEDEC standard 7A.

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