ST72F521, ST72521B 80/64-PIN 8-BIT MCU WITH 32 TO .
ST72521B - 80/64-PIN 8-BIT MCU
ST72521BR - 80/64-PIN 8-BIT MCU
ST72521BAR - 80/64-PIN 8-BIT MCU
ST72521BM - 80/64-PIN 8-BIT MCU