GR >> AT27C512R-12RI 
89405
AT27C512R-12RI
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 120NS 28SOIC
Description original&Quality new original
554255
AT27C512R-12RI
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 120NS 28SOIC
Description original&Quality new original