Anybody know where I could find the meaning of Mil Spec Codes e.g /883B /883C /883QS etc. used on IC's etc?

Question

Anybody know where I could find the meaning of Mil Spec Codes e.g /883B /883C /883QS etc. used on IC's etc?

Answer 1

The full spec would be MIL-STD-883 class B or class S. Class A and class C were deleted many years ago; I don't see any 883/QS. Look up the manufacturer datasheet using this nomenclature to see what it means. Probably a commercial designation omitting some of the class B requirements.

Per section 1.2 and 2.0 of MIL-STD-883F, quality requirements are per Appendix A of

MIL-PRF-38535 - Integrated Circuits (Microcircuits) Manufacturing, General Specification For.

(Copies of these documents are available online at http://assist.daps.dla.mil/quicksearch/ or www.dodssp.daps.mil or

from the Standardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

883 is a standard specifying standard test procedures for semiconductors.

MIL-M-38510 used to be the the matching document containing qualification requirements. This has apparently been replaced by 3 specs for dies, hybrids, and packaged semiconductors.

This document specifies 883 class B flow:

http://www.actel.com/documents/RTAXS_DS....

Class S (space) flow:

http://www.hittite.com/content/documents...

MIL specs are readily available on-line instantly from many vendors, or pretty much free from the government, but it takes many months to receive, if they even ship them anymore.

Answer 2

Those particular ones didn't show up in the search and I don't have any IC's handy to test but you can start here

http://www.nssn.org/?source=google&adgro...

There are thousands of Mil Specs.  On IC's most have to do with the extended operating temperature range and perhaps radiation hardness.