MY TechnoCare 8051 Development Board MAX232,AT89S52 Microcontroller IC + DS1307 RTC + 16x2 LCD Yellow Backlight+ATMEL AVR 8051 USB ASP ISP Programmer Kit For ATmega,89S51/XX,89S8252 etc Board Support 89C51/XX etc Architecture 40-Pin
AT89C51 Microcontroller – QuartzComponents
AT89C51RC-24PU 89C51 MICROCONTROLLER IC
AT89C51 Microcontroller Pinout, Features & Datasheet
Features of microcontroller 89c51 - Polytechnic Hub