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MIL-M-28787/234 Revision A, March 21, 1980
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Includes all amendments and changes through Cancellation Notice 2, August 13, 2013
Additional Comments: CNCL NO S/S
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This document establishes the requirements and test procedures for the procurement of an electronic crystal oscillator module.

The following electrical parameters reflect the 0° to 60°C and −55° to 100°C end-of-life limits from table I.
         Name                            Oscillator, crystal
         Family                          Digital
         Key code                        GVQ
         Size                            1A
         Weight                          35 grams maximum
         Environment                     Class I or Class II as specified in MIL-STD-1389

                                         Class I                Class II                     Unit

         Failure rate                    0.263                  0.286                    Failures/106
                                                                                         hours maximum
         Power supply                    5.0 ±10%               5.0 ±10%                     Vdc
         Power dissipation               330 max                330 max                      mW
           (outputs not loaded)
         Frequency             12.28677 min, 12.28923 max   12.28677 min, 12.28923 max       MHz
         Pulse width                36.6 min, 44.8 max           36.6 min, 44.8 max          ns
         Propagation delay time (Q to [Q bar] outputs)
           tPLH (CL = 130 pF)      2 min, 15 max            2 min, 15 max                    ns
           tPHL (CL = 130 pF)      2 min, 15 max            2 min, 15 max                    ns

         Output voltage
           Low level (IOL = 20 mA) 0.0 min, 0.5 max         0.0 min, 0.5 max                 V
           High level (IOH = −1 mA) 2.5 min, 4.5 max         2.5 min, 4.5 max                V

         Output drive current
           Low level (VOL = 0.5 V)       20 max                   20 max                     mA
           High level (VOH = 2.5 V)      −1 max                   −1 max                     mA

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Electronic Systems Command, ATTN: ELEX 5043, Department of the Navy, Washington, D.C. 20360, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

This module contains a 12.28800 MHz square waveform oscillator with both a true and a complement output.