MIL-DTL-24784/14B(SH)
reference to the power distribution diagrams in Chapter 5. Describe mechanical devices,
cooling systems, and so forth; support the descriptions by reference to mechanical schematic,
overall and functional block diagrams.
3.6.3.3.2 Integrated circuits and micro-miniature capsules. Simplified schematics in accordance
with NAVSEA SE000-01-IMB-010 or logic diagrams showing input and output connections,
truth tables, and waveforms as applicable, supported by a brief description of overall functional
operation, shall be included for circuits within different types of nonrepairable integrated circuits
and micro-miniature capsules. Nonrepairable circuits are not required for functional
understandings of theory of operation. Manufacturer's data sheet information may also be
included if it contains the technical contents of this requirement and meets the format and
legibility requirements of this specification.
3.6.3.3.3 Digital equipment. The functional description of digital equipment shall be similar to
that for conventional equipment. However, the functional and hardware makeup of digital
equipment requires a variation in the method of presentation and descriptive requirements.
Special considerations relative to the functional description of digital equipment are specified
herein.
3.6.3.3.3.1 Method of presentation. An overall description of the functional relationship of the
logic sections, units, and assemblies comprising the equipment shall be provided. The following
shall be included:
a.
An introduction to, and description of the signal characteristics:
1.
Signal levels or bi-stable states utilized by the equipment; that is, true (1) and false (0),
and their relative voltage levels.
2.
Interpretation of the word-code bit structure; that is, address, instruction, or data bit
codes.
3.
Signals, identified by their operational accomplishment.
b.
Overall and functional block diagrams and descriptions.
c.
Logic principles shall be described beginning with an introduction to the basic digital logic
symbology used in the manual. Each logic function shall be described and supported by
Boolean equations, truth tables, simplified logic diagrams, and timing diagrams.
d.
Functional description of power distribution, power supplies, and regulators shall conform to
3.6.5.1c.
3.6.3.4 Chapter 4, Scheduled maintenance. It is intended that the engineering effort required to
develop preventive maintenance data be expended only once and that the data, where applicable
be used both in this chapter and in Logistic Support Analysis (LSA) or maintenance requirements
cards (MRC) where one or more of the latter three data items are required by the contract (see
6.2). The preparation of this chapter of the manual should therefore be delayed until completion
of the, LSA or MRC; submissions of the manual draft copy for review should be marked "TO BE
SUPPLIED UPON COMPLETION OF LSA". When the approved LSA, or MRC data is
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