AT >> AT27C512R-15RA 
90917
AT27C512R-15RA
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 150NS 32PLCC
Description original&Quality new original
554262
AT27C512R-15RA
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 150NS 32PLCC
Description original&Quality new original