The CD54HC158 and CD74HC158 are obsolete and no longer are supplied. Data sheet acquired from Harris Semiconductor SCHS153C
CD54/74HC157, CD54/74HCT157, CD54/74HC158, CD54/74HCT158
High-Speed CMOS
Original
Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.