GR >> AT27C512R-45PC 
89418
AT27C512R-45PC
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 45NS 28DIP
Description original&Quality new original
554271
AT27C512R-45PC
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 45NS 28DIP
Description original&Quality new original