IEC 61240:2016
(Main)Piezoelectric devices - Preparation of outline drawings of surface-mounted devices (SMD) for frequency control and selection - General rules
Piezoelectric devices - Preparation of outline drawings of surface-mounted devices (SMD) for frequency control and selection - General rules
IEC 61240:2016 sets out general rules for drawing all dimensional and geometrical characteristics of a surface-mounted piezoelectric device package (referred to in this document as SMD) in order to ensure mechanical inter-changeability of all outline drawings of the SMDs for frequency control and selection. This edition includes the following significant technical changes with respect to the previous edition:
- outline drawings have been changed from three views (top, front and bottom) to that based on ISO layout in the third-angle projection, in which the view from the right has been added to the top, front and bottom views;
- reference line and geometrical dimensions of the package for enclosures have been changed for practical use;
- information on miniaturized leadless ceramic enclosures of piezoelectric devices (SMD) for frequency control and selection has been included in an annex.
Dispositifs piezoélectriques - Préparation des dessins d'encombrement des dispositifs pour montage en surface pour la commande et le choix de la fréquence - Règles générales
L'IEC 61240:2016 établit les règles générales pour dessiner toutes les caractéristiques dimensionnelles et géométriques des boîtiers de dispositifs piézoélectriques pour montage en surface (appelés CMS, composants pour montage en surface, dans le présent document) afin d'assurer l'interchangeabilité mécanique avec tous les autres dessins d'encombrement des dispositifs pour montage en surface pour la commande et le choix de la fréquence. La présente édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- les dessins d’encombrement en trois vues, (de dessus, de face et de dessous) ont été modifiés pour être conformes à la méthode de projection du troisième dièdre de l'ISO. La vue de droite a donc été ajoutée aux vues de dessus, de face et de dessous;
- les dimensions des lignes de référence et les dimensions géométriques du boîtier pour les enveloppes ont été modifiées pour une utilisation pratique;
- les informations sur les enveloppes céramiques sans fils de sortie miniaturisées des dispositifs piézoélectriques pour montage en surface (CMS) pour la commande et le choix de la fréquence ont été incluses dans une annexe.
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IEC 61240 ®
Edition 3.0 2016-10
INTERNATIONAL
STANDARD
Piezoelectric devices – Preparation of outline drawings of surface-mounted
devices (SMD) for frequency control and selection – General rules
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
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International Standards for all electrical, electronic and related technologies.
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IEC 61240 ®
Edition 3.0 2016-10
INTERNATIONAL
STANDARD
Piezoelectric devices – Preparation of outline drawings of surface-mounted
devices (SMD) for frequency control and selection – General rules
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 31.140 ISBN 978-2-8322-3692-5
– 2 – IEC 61240:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Classification of SMD . 6
4 Title of the outline drawing . 6
5 Composition of the outline drawing . 6
5.1 Elements of outline drawings . 6
5.2 Outline drawing . 7
5.3 Table of detailed dimensions. 7
5.4 Actual size sketch . 7
5.5 Drawing of terminal land areas . 7
5.6 Terminal lead details . 7
6 Requirements for terminal leads . 9
7 Requirements for the terminal land area . 9
8 Connections of terminal leads . 9
9 Descriptive notes . 10
Annex A (informative) Miniaturized leadless ceramic enclosures of piezoelectric
devices (SMD) for frequency control and selection . 13
A.1 Precise drawing . 13
A.2 Requirements for enclosures with 3 terminals . 15
A.3 Naming rule for new type of enclosures . 15
Annex B (informative) Example of terminal connections for surface-mounted
piezoelectric devices (SMD) for frequency control and selection . 17
Bibliography . 18
Figure 1 – Illustration of terminal projection zone . 8
Figure 2 – Example of a terminal land area . 9
Figure A.1 – Upper part of the view from above . 13
Figure A.2 – Front view (without a board) . 14
Figure A.3 – Front view (with a board) . 14
Table A.1 – Scale of drawings. 13
Table A.2 – Guideline for dimension table . 14
Table A.3 – Guideline for column “Max.” of Table A.2 for A, B . 15
Table A.4 – Examples of correspondence between new and old enclosures . 16
Table B.1 – Examples of terminal connections for various types of piezoelectric
devices . 17
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PIEZOELECTRIC DEVICES – PREPARATION OF OUTLINE
DRAWINGS OF SURFACE-MOUNTED DEVICES (SMD) FOR
FREQUENCY CONTROL AND SELECTION – GENERAL RULES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses
arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61240 has been prepared by lEC technical committee 49:
Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control,
selection and detection.
This third edition cancels and replaces the second edition published in 2012. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• outline drawings have been changed from three views (top, front and bottom) to that based
on ISO layout in the third-angle projection, in which the view from the right has been added
to the top, front and bottom views;
• reference line and geometrical dimensions of the package for enclosures have been
changed for practical use;
• information on miniaturized leadless ceramic enclosures of piezoelectric devices (SMD) for
frequency control and selection has been included in an annex.
– 4 – IEC 61240:2016 © IEC 2016
The text of this standard is based on the following documents:
CDV Report on voting
49/1172/CDV 49/1188/RVC
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
INTRODUCTION
The enclosures of quartz crystal resonators and oscillators are unified in this third edition of
IEC 61240.
Regarding the current situation of many quartz crystal device suppliers, many of them use their
own enclosure layouts in their catalogues. For the convenience of consumers, general rules of
enclosure layout and definition of size need to be unified.
The reasons prompting the revision of IEC 61240:2012 are as follows:
a) The height of packages should not be included in a drawing. Only the total height of
enclosures should be expressed.
b) In small enclosure types, the size tolerance in smaller enclosures will not meet the
conditions defined in Table A.3 (Annex A).
In newly proposed general rules of outline drawings, only the total height of enclosures should
be expressed and the size tolerance in smaller enclosures is revised.
– 6 – IEC 61240:2016 © IEC 2016
PIEZOELECTRIC DEVICES – PREPARATION OF OUTLINE
DRAWINGS OF SURFACE-MOUNTED DEVICES (SMD) FOR
FREQUENCY CONTROL AND SELECTION – GENERAL RULES
1 Scope
This International Standard sets out general rules for drawing all dimensional and geometrical
characteristics of a surface-mounted piezoelectric device package (referred to in this document
as SMD) in order to ensure mechanical inter-changeability of all outline drawings of the SMDs
for frequency control and selection.
2 Normative references
The following documents are referred to in the
...
IEC 61240 ®
Edition 3.0 2016-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Piezoelectric devices – Preparation of outline drawings of surface-mounted
devices (SMD) for frequency control and selection – General rules
Dispositifs piezoélectriques – Préparation des dessins d'encombrement des
dispositifs pour montage en surface pour la commande et le choix de la
fréquence – Règles générales
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des
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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
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3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 61240 ®
Edition 3.0 2016-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Piezoelectric devices – Preparation of outline drawings of surface-mounted
devices (SMD) for frequency control and selection – General rules
Dispositifs piezoélectriques – Préparation des dessins d'encombrement des
dispositifs pour montage en surface pour la commande et le choix de la
fréquence – Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.140 ISBN 978-2-8322-5159-1
– 2 – IEC 61240:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Classification of SMD . 6
4 Title of the outline drawing . 6
5 Composition of the outline drawing . 6
5.1 Elements of outline drawings . 6
5.2 Outline drawing . 7
5.3 Table of detailed dimensions. 7
5.4 Actual size sketch . 7
5.5 Drawing of terminal land areas . 7
5.6 Terminal lead details . 7
6 Requirements for terminal leads . 9
7 Requirements for the terminal land area . 9
8 Connections of terminal leads . 9
9 Descriptive notes . 10
Annex A (informative) Miniaturized leadless ceramic enclosures of piezoelectric
devices (SMD) for frequency control and selection . 13
A.1 Precise drawing . 13
A.2 Requirements for enclosures with 3 terminals . 15
A.3 Naming rule for new type of enclosures . 15
Annex B (informative) Example of terminal connections for surface-mounted
piezoelectric devices (SMD) for frequency control and selection . 17
Bibliography . 18
Figure 1 – Illustration of terminal projection zone . 8
Figure 2 – Example of a terminal land area . 9
Figure A.1 – Upper part of the view from above . 13
Figure A.2 – Front view (without a board) . 14
Figure A.3 – Front view (with a board) . 14
Table A.1 – Scale of drawings. 13
Table A.2 – Guideline for dimension table . 14
Table A.3 – Guideline for column “Max.” of Table A.2 for A, B . 15
Table A.4 – Examples of correspondence between new and old enclosures . 16
Table B.1 – Examples of terminal connections for various types of piezoelectric
devices . 17
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PIEZOELECTRIC DEVICES – PREPARATION OF OUTLINE
DRAWINGS OF SURFACE-MOUNTED DEVICES (SMD) FOR
FREQUENCY CONTROL AND SELECTION – GENERAL RULES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses
arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61240 has been prepared by lEC technical committee 49:
Piezoelectric, dielectric and electrostatic devices and
...
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