Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AT29C257-15JC found under Microcircuit Memory by Atmel Corporation. The National Stock Number assigned to this part is 5962015308835, 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 AT29C257-15JC.