AT >> AT27C512R-70RA 
90918
AT27C512R-70RA
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 70NS 32PLCC
Description original&Quality new original
554295
AT27C512R-70RA
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 70NS 32PLCC
Description original&Quality new original