HD63C09EP is a 3Mhz MPU, DIP-40 Package. Direct pin-for-pin replacement for the 6809E found in all Color Computers. Besides being a CMOS chip, which runs much cooler than the 6809E, the Hitachi 63C09E also contains an enhanced instruction set and additional CPU registers that bring significant performance beyond what a 6809 can provide. This 63C09E can replace any of the following: HD6309EP, HD63B09EP and many others. These are 100% tested working chips (100% tested / refurbished).