The W79E825ASG from Nuvoton Technology Corporation is an 8051 W79 microcontroller Integrated Circuit with 8-bit architecture, 20 MHz clock and 16 KB (16K x 8) flash, in a 20-SOIC package.
The W79E825ADG from Nuvoton Technology Corporation is an 8051 W79 8-bit microcontroller with a 20 MHz clock and 16KB (16K x 8) flash, in a 20-DIP package.