1、MIL-STD- 188-1 14A30 SEPTEMBER 1985.SUPERSEDINGMIL-STD-188-11 424 MARCH 1976?b.NO DELIVERABLEDATA REWIRED BYTHIS DOCUMENTMILITARY STANDARDELECTRICAL CHARACTERISTICSOFDIGITAL INTERFACE CIRCUITSTCTSAPPROVED FOR PUBLICRELEASE; DISTRIBUTIONIS UNLIMITEDCopyright Communications - Electronics Command Provi
2、ded by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-188-114A30 September 1985LJEPARTMENT OF DEFENSEbJashington, DC 20301Electrical Characteristicsof Digital Interface CircuitsMIL-STD-188-114A1. This Military Standard is approve
3、d and mandatory for use by all Depart-ments and Agencies of the Department of Defense, in accordance with thememorandum of the Under Secretary of Defense for Research and Engineering,dated 16 August 1983. (See Appendix A).2. Beneficial comments (reconwnendations, additions, deletions) and anypertine
4、nt data which may be of use in improving this document should betiddressed to:CommanderU.S. Army Communications-Electronics CommandATTN: AMSEL-SEI-IFort Monmouth, New Jersey 07703-5203by using the self-addressed Standardization Document Improvement proposal (DDForm 1426) appearing at the end of this
5、 document or by letter. )iiCopyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-188-114A30 September 1985FOREWORD1. Originally, Military Standard 188 (MIL-STD-188) covered tech
6、nicalstandards for tactical and long haul communications, but later evolvedthrough revisions (MIL-STD-188A, MIL-STD-188B) into a document applicable totactical communications only (MIL-STD-188C).2. The Defense Conwnunications Agency (DCA) publishec!D5A Circulars (DCAC)promulgating standards and engi
7、neering criteria applicable to the long haulDefense Communications System (DCS) and to the technical support of theNational Military Comnand System (NMCS).3. As a result of a Joint Chiefs of Staff (JCS) action, standards for allmilitary corrxnunicationsare now being published in a PIIL-STD-188 serie
8、s ofdocuments. The MIL-STD-188 series is subdivided into a MIL-STD-188-1OOseries covering common standards for tactical and long haul conmnications, aMIL-STD-188-200 series covering standards for tactical communications only,and a MIL-STD-188-300 series covering standards for long haul communication
9、sonly. Emphasis is being placed on developing connnon standards for tacticaland long haul communications published in the MIL-STD-188-1OO series.4. This document contains electrical and functional characteristics of theunbalanced and balanced voltage digital interface circuits applicable to bothlong
10、 haul and tactical connunications.5. This document supersedes MIL-STD-188-114 which superseded subparagraph4.3.1.3 of MIL-STD-188-1OO and subparagraph 7.2.1 of MIL-STD-188C.iiiCopyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or netwo
11、rking permitted without license from IHS-,-,-MIL-STD-188-114A30 September 1985 IDENTIFICATION OFINTERNATIONAL STANDARDIZATION AGREEMENTCertain provisions of this document (see 4.7) are the subject of inter-national? standardization agreement QSTAG 594. Uhen an amendment, revision,or cancellation of
12、this standard is proposed which will modify the inter-national agreement concerned, the preparing activity will take appropriateaction through international standardization channels, including departmentalstandardization offices to change the agreement or make other appropriateacconunodations.ACKNOW
13、LEDGEMENTThe Electronic Industries Association (EIA) is the copyright holder ofmaterial used in this document. Their permission to reproduce portions ofEIA Standards RS-422A and RS-423A is gratefully acknowledged. These EIAstandards may be purchased from the Electronics Industries Association (EIA),
14、2001 Eye Street, I!.W.,Washington, D.C., 20006.ivVW v . . . - - Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.a71Paraqraph11.11.21.322.12.1.12.1.22.233.13.244.14.24.34.44.4.14.
15、4.24.4.34.54.64.74.8MIL-STD-188-114A30 September 1985CONTENTSTitlePromulgation sheetForewordIdentification of InternationalStandardization AgreementAcknowledgementsCOPEPurposeApplicationSystem standards and design objectivesREFERENCED DOCUMENTSGovernment documentsStandardsOther Government documents
16、and publicationsOrder of precedenceDEFINITIONSDefinitionsAbbreviations and acronymsGENERAL REQUIREMENTSDescription of digital interfacecircuitsDescription of functionalinterchange circuitsSignaling rate rangeSelectiorl of type of digital interfacecircuitTypes of balanced generatorsUse of balanced vo
17、ltage digitalinterface circuitUse of balanced and unbalanced voltagedigital interface circuitsRelationship with other digitalinterface standardsGrounding requirementsInteroperability requirements of ABCA ArmiesCompromising emanations (TEMpEST) requirements 10PacJgiiiiiiviv11134444455577778889999Copy
18、right Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-188-114A30 September 1985Paraqraph Title Pacje55.15.1.15.1.1.15.1.1.25.1.1.35.1.1.45.1.1*55.1.1.65.1.1.75.1.1.85.1.1.95.1.25.1.
19、35.1.3.15.1.3.25.1.3.35.1.3.45.1.3.55.1.3.65.1.45.1.55.25.2.15.2.1.15.2.1.25.2.1.35.2.1.45.2.1.55.2.1.65.2.1.75.2.1.85.2.25.2.35.2.3.15.2.3.25.2.3.35.2.3.45.2.3.55.2.3.65.2.3.75.2.45.2.55.3DETAILED REQUIREMENTSUnbalanced voltage digital interfacecircuitGenerator characteristicsSignal senseSignaling
20、rate rangeOpen-circuit measurementTest termination measurementShort-circuit measurementPower-off measurementOutput signal waveformOutput signal waveshapingHigh impedance output stateWire or cable characteristicsLoad characteristicsReceiver input current-voltagemeasurementReceiver input sensitivity m
21、easurementReceiver input balance measurementMultiple receiversFail safe operationTotal load characteristic limitsOperational constraintsCircuit protectionBalanced voltage digital interface circuitGenerator characteristicsSignal senseSignaling rate rangeOpen-circuit measurementTest termination measur
22、ementShort-circuit measurementPower-off measurementOutput signal waveformHigh impedance output stateWire or cable characteristicsLoad characteristicsReceiver input current-voltagemeasurementReceiver input sensitivity measurementReceiver input balance measurementMultiple receiversFail safe operationT
23、otal load characteristic limitsWire or cable termination resistanceOperational constraintsCircuit protectionTerminated voltage digital interfacecircuit111112121214141415151717171818181820202021222222222225252525282828282828282929292930 I-30viCopyright Communications - Electronics Command Provided by
24、 IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-paraqraph5.3.15.3.1.15.3.1.25.3.1.35.3.1.45.3.1.55.3.1.65.3.1.75.3.25.3.35.3.3.15.3.3.25.3.3*35.3.3*45.3.3.55. 3.3.65. 3.3.75.3.45.3.55.45.4.15.4.25.4.2.15.4.2.25.4.2.35.4.2.45.4.2.55.4.2.6
25、. 5.4.2.75.4.2.85.4.2.95.4.2.10MIL-STD-188-114A30 September 1985Title PaqeGenerator characteristicsSignal senseSignaling rate rangeOutput voltage measurewntBalance measurementCurrent measurementsPower-off testOutput si nal waveform!Mire or cab e characteristicsLoad characteristicsReceiver input curr
26、ent-voltagemeasurementReceiver input sensitivity measurementReceiver input balance measurementMultiple receiversFail safe operationTotal load characteristic limitsWire or cable termination resistanceOperational constraintsCircuit protectionFunctional interchange circuitsInterchange circuit requireme
27、ntsInterchange circuit functionsRequest to sendClear to sendReceive input controlSend dataReceive dataSend timingReceive timingSend commonReceive conunonSignal ground3030303033333333353535353535353535353535353737373737373838383838Copyright Communications - Electronics Command Provided by IHS under l
28、icense with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iIL-STD-188-l14A30 September 1985 -FIGURESTitleBlock diiigramof data terminal subsystemPaqe21113hlumber123456Unbalanced voltage digital interface circuitUnbalance generator parameter measurementshominl
29、 waveform of unbalanced generatorIJnblancedgenertc)r output signal waveformExample method for waveshaping of unbalancedvoltage digital interface circuitReceiver input current-voltage measurement 19789101112131415161?J8Receiver input sensitivity measurement 19Receiver input balance measurement23Balan
30、ced voltage digital interface circuitBalanced generator prameter mesurernents26Nominal waveforms of type I and type 11 generators27Balanced generator output signdl waveformTerminated voltage digital interface circuit 3i32Terminated voltye generator parameter measurementsTerminated voltage genertor o
31、utput signal waveform 3436Example of functional interchange circuitsSignling rate or cable length versus risetimefor unbalanced voltage digital interface circuit 4547Cable pir RC time.constant versus ciiblelength1920 Signaling rate versus cable length for balancedvoltdge digitl interface circuitviii
32、Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-188-114A30 September 1985PaqeTitleNumber21 Example method of fail-safe for unbalancedvoltge digital interface circuit 51Exa
33、mple method of fail-safe for balancedvoltage digital interface circuit 5254a71a15Examples of optional grounding arrangements2324 Interconnectior of signal comnon return forunbalanced voltage digital interface circuit 5660Unbalnced generator driving unbalanced receiverUnbalanced generator driving bal
34、anced receiverwithout inversion of MARK-SPACE signal sense 60Unbalanced generator driving balanced receiverwith inversion of MARK-SPACE signal sense 61Unb-lanced generator drivirlgbalanced wirepair with balanced receiver28616262Balanced generator driving balanced receiverBalanced generator driving u
35、nbalanced receiverTABLESPaqe122237TitleSignal sense for unbalanced generatorsSignal sense for balanced generatorsIIFunctionl interchange circuits111Intcroperation among devices complying withdifferent low level digital interface standards 63ixCopyright Communications - Electronics Command Provided b
36、y IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-riJL-sTD-188-l14A30 September 1985APPENDICES-ppndixABcParagraph3030.130.230.330.3.130.3.230.3.330.3.430.3.530.3.630.430.530.5.130.5.230.630.6.1ADOendixTitle PaqeMemorandum f*omthe Under Se
37、cretary of Detensefor Research and Engineering, 16 August 1983,Subject: Mandatory Use of Military Telecom-munications Standards in the MIL-STD-188 Series 39List of Abbreviations and Acronyms used in141L-STD-188-114A41Guidelines on Interconnections 43Title PaqeGENERALScopeApplicationGuidelines on int
38、erconnectingwire or cable characteristicsConductor sizeMutual pair capacitanceStray capacitancePair-to-pair balanced crosstalkMire or cable length for unbalancedvoltage digital interface circuitWire or cable lerlgthfor balancedvoltage digital interface circuitWire or cable termination resistanceFail
39、 safe operationExample of fail sefe operationfor unbalanced voltage digitalinterface circuitExample of fail safe operationfor balanced voltage digitalinterface circuitOptional grounding arrangementsSignal common return forunbalanced voltage cligita?interface circuitGuidelines on InteroperatiorAmong
40、Devices Complying withllifferent Low Lem! DigitalInterface Standarcs434343434344444444464949505053xCopyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.Paragraph4040.140.240.340.440.5
41、40.5.140.5.2MIL-STD-188-114A30 September 1985TitleGENERALScopeApplicationUnbalanced voltage digitalinterface standardsBalanced voltage digitalinterface standardsInterfacing balanced orunbalanced generators withbalanced or unbalanced receiversExamples of interfacingunbalanced generators withbalanced
42、or unbalancedreceiversExamples of interfacingbalanced generators withbalanced or unbalancedreceiversPaqe5757575757585959xiCopyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STU-1
43、88-114A30 September 19851. SCOPE1.1 Purpose. This document specifies the electrica? characteristics ofthe unbalanced voltage and the balanced voltage digital interface circuits,normally implemented in integrated circuit (IC) technology. These circuitsshall be employed for the interchange of serial d
44、igital binary signalsbetween and among Data Terminal Equipment (DTE) ano Data Circuit TerminatingEquipment (DCE) or in any interconnection of binary signals between physi-cally separated equipment, regardless of the type of information, such asdigitized voice or data, that is represented by the bina
45、ry signals.The technical parameters promulgated by this document represent, ingeneral, minimum interoperability and performance characteristics which maybe exceeded in order to satisfy specific requirements. Additional nonstan-dard interface characteristics may also be implemented to satisfy specifi
46、cinteroperability requirements, provided that a basic capability exists tointeroperate with a standard interface as stated in this document.This document does not specify other characteristics of the DTE/DCEinterface, such as signal quality, and clock/data phase relationship, essen-tial for satisfac
47、tory operation of the interconnected equipment. Thosestandards are contained in MIL-STD-188-100 and MIL-STD-18S-200.1.2 A lication.+This document shall be used in the design, installation,and operation o new communications facilities for both the long haul andtactical systems. This document shall be
48、 applicable to data, timing orclock, and control circuits employed at the interface between equipment wherethe information being conveyed is in the form of binary signals at the directcurrent (de) baseband level. This document shall also be applicable to alarmand control circuits that are net direct
49、ly related to data or timing.This document shall apply to teletypewriters, data terminals, the dcside of signal conversion equipment, both terminal and IiPe side of crypto-graphic or cryptographic control equipment, digitized voice equipment, andremotely operated equipment where the interf.ce is at the dc baseband. Thisdocument shall be a
