GR >> AT27C512R-90RC 
89440
AT27C512R-90RC
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 90NS 28SOIC
Description original&Quality new original
554306
AT27C512R-90RC
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 90NS 28SOIC
Description original&Quality new original