GR >> AT27C512R-55RI 
89429
AT27C512R-55RI
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 55NS 28SOIC
Description original&Quality new original
554285
AT27C512R-55RI
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 55NS 28SOIC
Description original&Quality new original