Winbond - 8-bit MCU Series (80C51-based)

The W79E649A W79L649A is a fast 8051 compatible Microcontroller with a redesigned processor core without wasted Clock and memory cycles. Typically, the instruction executing time of W79E649A W79L649A is 1.5 to 3 times faster than that of traditional 8051 depending on the type of instruction. In general, the overall performance is about 2.5 times better than the original for the same crystal speed. Consequently, the W79E649A W79L649A is a fully static CMOS design; it CAN also be operated at a lower crystal Clock By Winbond Electronics Corp America