Talk:Texas Instruments/Archives/2014

5400 series was mil spec

The 5400 logic series was the military spec equivalent of the 7400 series. This was common knowledge among digital designers in the 1970's and 1980's. Constant314 (talk) 22:21, 23 April 2012 (UTC)

Pls give a reference for the common knowledge. Polmandc (talk) 04:50, 24 April 2012 (UTC)

Please refer to this link http://faculty.weber.edu/fonbrown/EE1000/Chapter%206.pdf

"The industry standard for logic device nomenclature today is the 5400/7400 series (originally developed by Texas Instruments); it is by far the most common and encompasses a great many logic families. The difference between the 5400 and the 7400 series is that the 5400 series devices operate over the military temperature range of -55°C to 125°C, and the less expensive 7400 series devices need only operate over the commercial temperature range of 0°C to 70°C."

This is only "common knowledge" among experienced and aged engineers, and this is rarely documented since military documentations generally will not be released to public. All the mil-spec that leaked out in the market is actually illegal stuffs except there are very common.

To make the discussion more complete, temperature range for IC can be divided into following categories: Commerical: 0-70C Industrial: -40-85C Automotive Grade: -40-125C (there are sub-grades but I think it is not important to mention) Military Grade: -55-125C

You can see there is a gradual trend of increase in temperature range. Rimsky.cheng (talk) 02:01, 3 October 2014 (UTC)