Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UPD43256C-12L found under Microcircuit Memory by Nec Electronics U S A Inc. The National Stock Number assigned to this part is 5962012878526, 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 UPD43256C-12L.