High temperature operations of digital technology are limiting the performance of critical systems that provide everything from security of the Homeland to Energy development, Utilities/Infrastructure, Aerospace and Automotive. Micro-electronics provides a high ROI in these complex applications. There are recent component technology offerings, so this imperative can now significantly benefit from the advent of a new line of Microelectronics specifically for extreme/harsh environments, starting with the 300C Micro and a 225C, with SOI components, at a low-cost of entry. These new operating conditions will increase life & reliability of the systems up to 4 times. An example is a tool with up to four spinners (fluid flow measurement), four analog inputs (for pressure, temperature or other sensors), EEPROM storage (program and data), FSK logic (wireline data transmission), and a high-speed UART (tool communication). Additionally, this has the capability of field updates of code, and persistent calibration.