AT >> AT27C256R-15PA 
90914
AT27C256R-15PA
Atmel
Quantity 20000
Packaging IC OTP 256KBIT 150NS 28DIP
Description original&Quality new original
554163
AT27C256R-15PA
Microchip Technology
Quantity 9000
Packaging IC OTP 256KBIT 150NS 28DIP
Description original&Quality new original