GR >> AT27C512R-90JC 
89436
AT27C512R-90JC
Atmel
Quantity 20000
Packaging IC OTP 512KBIT 90NS 32PLCC
Description original&Quality new original
554301
AT27C512R-90JC
Microchip Technology
Quantity 9000
Packaging IC OTP 512KBIT 90NS 32PLCC
Description original&Quality new original