IEC TR 62240-1:2013

IEC/TR 62240-1 ®
Edition 1.0 2013-04
TECHNICAL
REPORT
colour
inside
Process management for avionics – Electronic components capability in
operation –
Part 1: Temperature uprating
IEC/TR 62240-1:2013(E)
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.

IEC Central Office Tel.: +41 22 919 02 11
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.

Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: csc@iec.ch.

IEC/TR 62240-1 ®
Edition 1.0 2013-04
TECHNICAL
REPORT
colour
inside
Process management for avionics – Electronic components capability in

operation –
Part 1: Temperature uprating
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XA
ICS 03.100.50; 31.020; 49.060 ISBN 978-2-83220-739-0

– 2 – TR 62240-1  IEC:2013(E)

CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 Scope . 7

2 Normative references . 7

3 Terms, definitions and abbreviations . 7

3.1 Terms and definitions . 7

3.2 Abbreviations . 10

4 Selection provisions . 10
4.1 General . 10
4.2 Device selection, usage and alternatives . 10
4.2.1 General . 10
4.2.2 Alternatives . 11
4.2.3 Device technology . 11
4.2.4 Compliance with the electronic component management plan . 11
4.3 Device capability assessment . 12
4.3.1 General . 12
4.3.2 Device package and internal construction capability assessment . 12
4.3.3 Risk assessment (assembly level) . 12
4.3.4 Device uprating methods . 13
4.3.5 Device reliability assurance . 14
4.4 Device quality assurance in wider temperature ranges . 15
4.4.1 General . 15
4.4.2 Device parameter re-characterisation testing . 15
4.4.3 Device parameter conformance testing . 15
4.4.4 Higher assembly level testing . 15
4.4.5 Semiconductor device change monitoring . 16
4.4.6 Failure data collection and analysis . 16
4.5 Documentation . 16
4.6 Device identification . 16
Annex A (informative) Device parameter re-characterisation . 20
Annex B (informative) Stress balancing. 32
Annex C (informative) Parameter conformance assessment . 42

Annex D (informative) Higher assembly level testing . 49
Bibliography . 52

Figure 1 – Flow chart for semiconductor devices in wider temperature ranges . 18
Figure 2 – Report form for documenting device usage in wider temperature ranges . 19
Figure A.1 – Parameter re-characterisation . 21
Figure A.2 – Flow diagram of parameter re-characterisation capability assurance
process . 23
Figure A.3 – Margin in electrical parameter measurement based on the results of the
sample test . 26
Figure A.4 – Schematic diagram of parameter limit modifications . 27
Figure A.5 – Parameter re-characterisation device quality assurance . 28
Figure A.6 – Schematic of outlier products that may invalidate sample testing . 29

TR 62240-1  IEC:2013(E) – 3 –

Figure A.7 – Example of intermediate peak of an electrical parameter: voltage

feedback input threshold change for Motorola MC34261 power factor controller. . 30

Figure A.8 – Report form for documenting device parameter re-characterisation . 31

Figure B.1 – Iso-T curve: the relationship between ambient temperature and
J
dissipated power . 34

Figure B.2 – Graph of electrical parameters versus dissipated power. 35

Figure B.3 – Iso-T curve for the Fairchild MM74HC244 . 38
J
Figure B.4 – Power versus frequency curve for the Fairchild MM74HC244 . 39

Figure B.5 – Flow chart for stress balancing . 40

Figure B.6 – Report form for documenting stress balancing . 41
Figure C.1 – Relationship of temperature ratings, requirements and margins . 43
Figure C.2 – Typical fallout distribution versus T . 45
req-max
Figure C.3 – Parameter conformance assessment flow . 47
Figure C.4 – Report form for documenting parameter conformance testing . 48
Figure D.1 – Flow chart of higher level assembly testing . 50
Figure D.2 – Report form for documenting higher level assembly test at temperature
extremes . 51

Table A.1 – Example of sample size calculation . 24
Table A.2 – Parameter re-characterisation example: SN74ALS244 Octal Buffer/Driver . 27

– 4 – TR 62240-1  IEC:2013(E)

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
PROCESS MANAGEMENT FOR AVIONICS –

ELECTRONIC COMPONENTS CAPABILITY IN OPERATION –

Part 1: Temperature uprating
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.

The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC/TR 62240-1, which is a technical report, has been prepared by IEC technical committee
107: Process management for avionics.
This first edition cancels and replaces IEC/TR 62240 published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant changes:
a) Document is revised from IEC/TR 62240 to IEC/TR 62240-1.
b) Revised wording in clauses/subclauses: Introduction and Clauses 1 to 4 including
paragraph clarifications and corrections.

TR 62240-1  IEC:2013(E) – 5 –

c) Removed a
...