IEEE 91 : 1984

Table of Contents

1 Introduction
  1.1 Purpose
  1.2 Scope
  1.3 Organization
  1.4 Applicable documents
  1.5 Definitions
  1.6 Orientation of qualifying symbols
2 Symbol construction
  2.1 Composition of a symbol
  2.2 Outlines
  2.3 Use and combination of outlines
3 Qualifying symbols associated with inputs, outputs, and other
  connections
  3.1 Negation, polarity, and dynamic input symbols
  3.2 Internal connections
  3.3 Symbols inside the outline
  3.4 Subsidiary (formerly nonlogic) connections and
  3.5 signal-flow indicators
4 Dependency notation
  4.1 General explanation
  4.2 Summary of types of dependencies
  4.3 Application of dependency notation
  4.4 Special techniques used in dependency notation
5 Combinational and sequential elements
  5.0 General notes
  5.1 Basic combinational elements
  5.2 Buffers with special amplification, drivers, receivers, and
       bidirectional switches
  5.3 Elements exhibiting hysteresis Schmitt triggers Bithreshold
       detectors
  5.4 Coders
  5.5 Signal-level converters
  5.6 Multiplexers and demultiplexers
  5.7 Arithmetic elements
  5.8 Delay elements
  5.9 Basic bistable elements
  5.10 Bistable elements with special switching properties
  5.11 Monostable elements
  5.12 Astable elements
  5.13 Shift registers and counters
  5.14 Memories
  5.15 Display elements
6 Symbols for highly complex functions
  6.1 General symbol and basic rules
  6.2 Internal diagrams
  6.3 Examples of complex elements
Annex A Recommended symbol proportions (Informative)
Annex B Revised or deleted symbols (Informative)
Annex C Composite chart showing relationship of graphic symbols
        for logic diagrams from IEEE Std 91-1984, IEEE Std 91a-1991,
        and the superseded standards (Informative)
Annex D Integrated circuits used as examples commercial part
        numbers versus symbol numbers (Informative)

Abstract

Presents graphic symbols for representing logic functions or physical devices capable of carrying out logic functions. Descriptions of logic functions, the graphic representation of these functions, and examples of their applications are given. The symbols are represented in the context of electrical applications, but most may also be applied to nonelectrical systems (for example, pneumatic, hydraulic, or mechanical).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Institute of Electrical & Electronics Engineers
Pages
ISBN
Committee	SCC 11
Supersedes	MIL STD 806 : B ANSI Y32.14 : LATEST IEEE Y32.14 : 1984 IEEE 91A : 1991