6805 Microcontrollers

Tekmos has developed a 6805 design that can be used to replace many variations of the 6805 and 68705 microcontrollers. Our first part will be the TK68HC05B6, with 6K of ROM. Our second part will be the user programmable TK68HC705C8A / TK68HC705C9A devices. These parts will use flash memory as contrasted to the original part’s One Time Programmable (OTP) EPROM. The initial design will also support the B4 and B8 versions of the 6805. The B16 and B32 will be available with a longer lead time.

The Tekmos 6805 design has been carefully designed to duplicate the original 6805 on a clock for clock basis. This guarantees complete compatibility with existing code. Even timing loops will work perfectly.

Tekmos is currently seeking customers willing to evaluate our daughtercard-based breadboard in their system for the purposes of design verification.

Below is a list of 6805 microcontroller variants that are either available immediately or under development. If you need a version not listed here then please contact us at This e-mail address is being protected from spam bots, you need JavaScript enabled to view it