International ISO Standard IS0 17987-4 Road vehicles Local Interconnect Second edition Network (LIN) - 2025-06 Part 4: Electrical physical layer (EPL) specification 12 V/24 V Vehicules routiers - Reéseau Internet local (LIN) - Partie 4: Spécification de la couche électrique physique (EPL) 12V/24V Reference number IS0 17987-4:2025(en) @ ISO 2025 IS0 17987-4:2025(en) COPYRIGHTPROTECTEDDOCUMENT IS02025 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or ISo's member body in the country of the requester. ISO copyright office CP 401: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland @ IS0 2025 - All rights reserved ii IS0 17987-4:2025(en) Contents Page Foreword .iv Introduction V 1 Scope. .1 2 Normative references .1 3 Terms, definitions, symbols and abbreviated terms .1 3.1 Terms and definitions .1 3.2 Symbols. ..2 3.3 Abbreviated terms .5 4 Conventions .6 5 Electrical physical layer requirements 5.1 Bit rate deviation. 6 5.1.1 General .6 5.1.2 12 V LIN systems: parameters .6 5.1.3 24 V LIN systems: parameters .7 5.2 Timing requirements. .9 5.2.1 Bit timing .9 5.2.2 Synchronizationprocedure ..9 5.2.3 Bit sample timing. .10 5.3 Line driver/receiver. 12 5.3.1 General configuration 12 5.3.2 Definition of supply voltages for the physical interface 12 5.3.3 Signal specification. 13 5.3.4 12 V LIN systems: electrical parameters. .14 5.3.5 24 V LIN systems: Electrical parameters 18 5.3.6 Line characteristics .21 5.3.7 12 V LIN systems: performance in non-operation supply voltage range 22 5.3.8 24 V LIN systems: performance in non-operation supply voltage range. 22 5.3.9 Performance during fault modes. 22 5.3.10 ESD/EMI compliance 22 6 Procedures C, D and E .23 AnnexA(informative)LiNperipheralinterfacedesignconsiderations .24 Annex B (normative) LIN AA procedure C physical layer .29 Annex C (normative) LIN AA procedure D physical layer .32 Annex D (normative) LIN AA procedure E physical layer .39 Bibliography .43 @ IS0 2025 - All rights reserved iii IS0 17987-4:2025(en) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the Iso/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of Iso documents should be noted. This document was drafted in accordance with the editorial rules of the ISo/IEC Directives, Part 2 (see www.iso.org/directives). Iso draws attention to the possibility that the implementation of this document may involve the use of (a) patent(s). Iso takes no position concerning the evidence, validity or applicability of any claimed patent rights in respect thereof. As of the date of publication of this document, Iso had received notice of (a) patent(s) which may be required to implement this document. However, implementers are cautioned that thismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableat www.iso.org/patents. IsO shall not be held responsible for identifying any or all such patent rights. Any trade name used in this document is information given for the conven