Welcome to Futurlec. The ELECTRONIC COMPONENTS Superstore. To find the component your looking for, either search by Part Number or visit the relative department. Need Help. 74 SERIES 74 Series   Standard 74 Series, not recommended for new designs, as has been superseded by 74LS, 74HC series. 74LS SERIES 74LS Series Low Power Schottky Logic Family, offering improved speed and reduce power consumption to standard 74 series.   74LS SMD 74LS SMD Series Low Power Schottky Logic Family, in SMD type for compact designs.   74HC SERIES 74HC Series   High Speed CMOS Logic Family 74HCT SERIES 74HCT Series   High Speed Low Power CMOS Family, similar to LSTTL.