Operational Temperature Ranges

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IC Temperature Range

There are four classes of devices to choose from, as it applies to operational temperature range.
The Military family of parts offer the widest range possible for temperature extremes.
The Extended range family is not available for most devices.

The Temperature Range table above list particular temperature ranges per class of IC devices, by device [part number] prefix. So, if you need to operate within a particular temperature range, a different class of devices [ICs] need to be selected.

The tables above list, in general, the logic family types offered in the particular temperature ranges. There are a number of "sub" TTL Glue Logic families which offer either Industrial or Extended temperature range parts; how ever, as a rule it's defined on a per part or function basis. There is no generic part number to call out which defines either of those type of parts. Of course, once a particular family is chosen than it becomes fairly easily to determine if any parts are produced which work in a certain temperature range.

The 74xx digital logic families [or just 74 prefix] refer to a commercial operating temperature range. The 54xx part number [or just 54 prefix] refers to a military operating temperature range. Some 74xx device families may also work at the Industrial temperature range [but you have to check, there is no hard and fast rule]. So a 74xx244 works at a commercial operating temperature, while a 54xx244 which is the same logic device [maybe the same pinout, and package] will continue to operate to the military operating temperature range [which is wider]. The same is true for analog devices; an LM3 [commercial device] is the same as a LM1 device [but works to a military operating temperature range]. There are other designators which indicate the package type, but it does not have anything to do with operating temperature range..

So, with out a lot of words ~ pick a device with a prefix to match the operational temperature range.

Back to the main Logic Design Page or IC Manufacturers link page

Engineering Design Key words: Glue Logic Families, CMOS, TTL, ECL, Speed, IC, Integrated Circuits, Logic Types, 74xx, Operational Temperature Range, Temp Range, Commercial operating temperature range, Industrial temperature range, Military operating temperature range, Manufacturers part number prefix, Ambient Temperature, 74xx

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