GR >> AT27C512R-55PC 
89426
AT27C512R-55PC
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 55NS 28DIP
Description original&Quality new original
554282
AT27C512R-55PC
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 55NS 28DIP
Description original&Quality new original