National Semiconductor was an American semiconductor manufacturer, that specialized in analog devices and subsystems, formerly headquartered in Santa Clara, California, USA.
The products of National Semiconductor included power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions.
National’s key markets included wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications.
On September 23, 2011, the company formally became part of Texas Instruments as the “Silicon Valley” division.
Wiki of National Semiconductor
An Exquisite Evaluation Board from National Semiconductor