Resources and Help IEEE Standard Reference Designations for Electrical and Electronics Parts and Equipments Abstract: This revision added paragraphs on repeated circuits, selected and matched parts, and designation of deposited components on hybrid printed circuits. Supplement A of was incorporated into the text, along with minor clarifications and updating of references. Significant changes are marked by vertical black bars in the margin, adjacent to the changed text. The original issue of this standard was prepared by Subcommittee 16 on Reference Designations, appointed by Sectional Committee Y32 on Graphic Symbols and Designations for the purpose of preparing standard reference designations in the field of electrical and electronic equipment. In the U. In order to minimize confusion, intensive and successful efforts have since been made to coordinate the two standards throughout their subsequent revisions.
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