National Semiconductor NSN66A  
Written by Accutron on 2017-02-17  

The NSN66A is a classic example of National Semiconductor's calculator display products. The NSN66A has single-die digit segments mounted on a ceramic or PCB substrate, with a red plastic cover to protect the dies and bond wires.

National Semiconductor NSN66A numeric LED display.

NSN66A, internal construction under magnification. Each die has four circular emissive regions.

NSN66A, early revision with ceramic substrate and heavy gold trim.

NSN66A displays, underside construction.

This article is part of the [Integrated Optoelectronics] exhibit.

©2000-2019 The Vintage Technology Association. All rights reserved.