Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MC74F139N found under Microcircuit Digita by Components Corp Of America. The National Stock Number assigned to this part is 5962012672856, and the Federal Supply Class is 5962 Microcircuits Electronic. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MC74F139N.