Texas Instruments 486DX Microprocessor

In 1989, the 32-bit 80486 heralded the fourth generation of microprocessors with two radical innovations: the integration of a floating-point unit along with the processor and the addition of an internal 8-Kbyte memory cache. With 1.2 million transistors on an 81-square millimeter silicon die, the 486 chip was created with 1.0-micron complementary metal oxide semiconductor (CMOS) technology. This microprocessor took the world's personal computer markets by storm, and was issued by the designer, Intel, and licensed manufacturers such as Texas Instruments, IBM, Advanced Micro Devices, and Cyrix.