8051 Microcontrollers

Tekmos has developed an 8051 core that can be used to replace many variations of the 8051 microcontroller. Some of the 8051s that we support are the NXP S87C751/S83C751, the NXP 80C668, and the original Intel 80C32. Our 8051 can also be used as a core in the customer's system on chip.

The Tekmos 8051 core has been carefully designed to duplicate the original 8051 on a clock for clock basis. This guarantees complete compatibility with existing code. Even timing loops will work perfectly.

Below is a list of 8051 microcontroller variants that are available immediately. 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

Part Number	Description	Datasheet
TK80C32	Microcontroller, 8051	Coming Soon
TK89C668	Microcontroller, 8051, 64K Flash, 8K RAM	TK89C668
TK87C751	Microcontroller, 8051, 64K Flash	TK87C751
TK83C751	Microcontroller, 8051, 2K ROM	TK83C751