National Semiconductor 4650  
Written by Accutron on 2017-02-24  

The National Semiconductor 4650 is a low cost non-programmable scientific calculator, released in 1976 against Texas Instruments' comparable TI-30. The 4650 chipset consists of the NS MM57103DWA/N Slide Rule Calculator and the DS8664N Segment-Digit Parallel-Input Display Driver. The display is a 12-digit NS module, internally similar to the NSA578.

National Semiconductor 4650 Manual (PDF)

National Semiconductor 4650 scientific calculator.

The stylish exterior of the 4650 conceals a cheap and simplified internal construction.

This article is part of the [Electronic Calculators] exhibit.

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