Intel 1702A & 8702A  
Written by Accutron on 2017-03-13  

Devices included in this entry:

Intel B1702A UV-EPROM (24-pin ceramic sandwich DIP; pictured in thumbnail)
Intel B8702A UV-EPROM (24-pin ceramic sandwich DIP)

Introduced in 1972, the Intel 1702 is the first commercially available UV-EPROM, capable of storing up to 256x8 bits. The 1702 was invented by founding Intel employee Dov Frohman, after discovering that stored charges in the broken gates of defective ICs would alter their behavior. By introducing an insulator that breaks down while exposed to ultraviolet radiation, an erasable and rewritable device could be manufactured.

The Intel 1702A is a revised variant of the original 1702 with a much faster programming time. While the 1702 draws a peak current of 1.2A during programming, the 1702A draws only 200mA, allowing for a much higher programming duty cycle. This reduces the programming time from 20 minutes on the 1702 to only two minutes on the 1702A.

Intel B1702A UV-EPROM.

Intel B8702A UV-EPROM.

This article is part of the [Digital Integrated Circuits] exhibit.

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