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.
Wiki of National Semiconductor
National's key markets included wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications.
UART 8250 solder on an interface card (PCB)
National Semiconductor was founded in Danbury, Connecticut by Dr. Bernard J. Rothlein on May 27, 1959, when he and seven colleagues, Edward N. Clarke, Joseph J. Gruber, Milton Schneider, Robert L. Hopkins, Robert L. Hoch, Richard N. Rau and Arthur V. Siefert, left their employment at the semiconductor division of Sperry Rand Corporation.
On September 23, 2011, the company formally became part of Texas Instruments as the "Silicon Valley" division.
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