MIL-HDBK-1331 Parameters To Be Controlled For The Specification Of Microcircuits, Handbook ForThis handbook describes the parameters required as a minimum for the specification of microcircuits. Parameters, rather than circuits, are considered because circuits vary with the manufacturers involved. Further, circuit designs should be subject to change if improvement results as long as the affected designs are compatible and fully interchangeable. The specific objectives of this document are as follows: a. To provide the minimum parameters that should be specified to ensure adequate evaluation of circuit design and performance. b. To provide maximum commonality of parameters for purpose of test and measurement, within and between major classes of microcircuit types and to allow the recognition of interface problems between types of microcircuits. c. To provide standard abbreviations, definitions and symbols pertinent to the specification of microcircuits. d. To promote maximum interchangeability and compatibility between microcircuits types.

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MIL-HDBK-1331A

3.  DEFINITIONS

3.1  For the purpose of this handbook, the terms, letter symbols, abbreviations, and definitions of

Appendix A should apply.

4.  GENERAL GUIDANCE

4.1  General.  The applicable acquisition documents prepared for the acquisition of microcircuits should include, as a minimum, the parameters described herein specified as a function of temperature and any other pertinent conditions as associated with the applicable microcircuit category.  The acquisition document should also contain the additional parameters and controls, if any, required for assurance of interchangeability in specific applications.  The acquisition document should also identify which parameters are to be tested on a 100 percent basis and which allow sampling.  Accept/reject limits for parameter values and acceptable quality levels, where applicable, should also be included.  The terminology and symbols used in the acquisition document should conform to those used herein.  The generic term "microcircuit" used in this handbook includes all categories of construction as defined in

MIL-PRF-38535.  Where MIL-STD-883 provides test methods for the parameters identified in section 5 or specified in the applicable acquisition document, the appropriate test method of MIL-STD-883 should be used for the measurement or control of those parameters and such use should be governed by the applicable general requirements of MIL-STD-883.

4.2  Requirements for standardization parameters.  In order to best fit the microcircuit user's needs for a standardized set of parameters, the following requirements have been established.

a.    All important circuit parameters should be described.

b.    The symbology should be descriptive of the measured parameters.

c.    Test parameters for a given microcircuit type or function should be specified in such a manner as to be independent of the internal microcircuit construction or the application of the microcircuit.

For logic circuits:

d.    Positive current should be defined as conventional current flow into a device terminal.

e.   The limiting terms "min" (minimum) and "max" (maximum) should be considered to apply to magnitudes only and the sign should be indicated.

f.    Vx should be considered to be a positive voltage at terminal x with respect to ground or 0 volts.

Vxy should be considered to be a positive voltage at terminal x with respect to terminal y. g.    Parameter limits should be specified under the least favorable appropriate conditions of

temperature, biases, supply voltages, signals, and loading within the applicable range of each test condition.

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