AT >> AT27C256R-90PA 
90916
AT27C256R-90PA
Atmel
Quantity 20000
Packaging IC OTP 256KBIT 90NS 28DIP
Description original&Quality new original
554207
AT27C256R-90PA
Microchip Technology
Quantity 9000
Packaging IC OTP 256KBIT 90NS 28DIP
Description original&Quality new original