AT >> AT27C256R-12PA 
90913
AT27C256R-12PA
Atmel
Quantity 20000
Packaging IC OTP 256KBIT 120NS 28DIP
Description original&Quality new original
554154
AT27C256R-12PA
Microchip Technology
Quantity 9000
Packaging IC OTP 256KBIT 120NS 28DIP
Description original&Quality new original