Tekmos is a fabless semiconductor company specializing in obsolescence solutions. If your semiconductor is being end-of-lifed by the original manufacturer, or will be soon, then Tekmos can be of assistance. Our complete product line is: 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.