GR >> AT27C512R-12PC 
89402
AT27C512R-12PC
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 120NS 28DIP
Description original&Quality new original
554252
AT27C512R-12PC
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 120NS 28DIP
Description original&Quality new original