This data selector/multiplexer contains full on-chip decoding to select the desired data source. The 74LS151 selects one-of-eight data sources. The 74LS151 has a strobe input which must be at a low logic level to enable these devices. A high level at the strobe forces the W output HIGH, and the Y output LOW. The 74LS151 features complementary W and Y outputs.

NOTE: HC version is the high speed CMOS version which we may supply due to availability. It is fully compatible with LS version and one to one replaceable (not vice versa as HC version has more features)

Datasheet:

LS: https://www.ti.com/lit/ds/symlink/sn74ls151.pdf

HC: https://assets.nexperia.com/documents/data-sheet/74HC_HCT151.pdf