Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AT28HC291 55LM 883 found under Microcircuit Memory by Atmel Corporation. The National Stock Number assigned to this part is 5962013584068, 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 AT28HC291 55LM 883.