IEC 62014-1:2001
(Main)Electronic design automation libraries - Part 1: Input/output buffer information specifications (IBIS version 3.2)
Electronic design automation libraries - Part 1: Input/output buffer information specifications (IBIS version 3.2)
Gives specifications for electronic behavioral of digital integrated circuit input/ output analog characteristics. It specifies a consistent software-parsable format for essential behavioral information. The goal of this standard is to support all simulators of all degrees of sophistication.
General Information
Standards Content (Sample)
INTERNATIONAL IEC
STANDARD
62014-1
First edition
2001-05
Electronic design automation libraries –
Part 1:
Input/output buffer information specifications
(IBIS version 3.2)
Reference number
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INTERNATIONAL IEC
STANDARD
62014-1
First edition
2001-05
Electronic design automation libraries –
Part 1:
Input/output buffer information specifications
(IBIS version 3.2)
IEC 2001 Copyright - all rights reserved
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 the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
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International Electrotechnical Commission
For price, see current catalogue
− 2 − 62014-1 IEC:2001(E)
CONTENTS
Page
FOREWORD . 3
INTRODUCTION . 5
Scope and object . 7
Section 1: General introduction . 8
Section 2: Statement of intent . 9
Section 3: General syntax rules and guidelines. 11
Section 4: File header information . 13
Section 5: Component description. 15
Section 6: Model statement. 24
Section 6a: Add submodel description . 50
Section 7: Package modeling . 60
Section 8: Electrical board description. 72
Section 9: Notes on data derivation method . 80
62014-1 © IEC:2001 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRONIC DESIGN AUTOMATION LIBRARIES-
Part 1: Input/output buffer information specifications
( IBIS version 3.2 )
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all
national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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
National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form of
standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that
sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards
transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC
Standard and the corresponding national or regional standard shall be clearly indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment
declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent
rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62014-1 has been prepared by IEC technical committee 93: Design
Automation
This standard is based on ANSI-EIA-656-A (September 1999): I/O buffer information specifications
(IBIS) version 3.2
The text of this standard is based on the following documents:
FDIS Report on voting
93/129/FDIS 93/136/RVD
Full information on the voting for the approval of this standard can be found in the report on voting
indicated in the above table.
This standard does not follow the rules for the structure of international standards given in Part 3 of
the ISO/IEC Directives.
IEC 62014 consists of the following parts:
IEC 62014-1, Electronic design automation libraries – Part 1: Input/Output buffer information
specifications (IBIS version 3.2)
IEC 62014-2, Electronic design automation libraries – Part 2: Library standard architectures
(TR)(under consideration)
Electronic design automation libraries – Part 3: Modules of integrated circuits for EMI
IEC 62014-3,
Behavioural simulation (under consideration )
− 4 − 62014-1 IEC:2001(E)
The committee has decided that the contents of this publication will remain unchanged until 2004. At
this date, the publication will be
reconfirmed;
withdrawn;
replaced by a revised edition, or
amended.
62014-1 © IEC:2001 – 5 –
INTRODUCTION
Background of IBIS
IBIS was first developed at Intel Corporation and has been expanded to its current form (Version 3.2)
through the cooperative efforts of additional analog simulator vendors, computer manufacturers, IC
vendors, commercial users, and universities. In May 1993, the group formed itself into the IBIS Open
Forum, an open, voluntary, cooperative association. In March 1995, the group affiliated with the EIA
(now the Electronic Industries Alliance) as the EIA IBIS Open Forum.
The Forum has been and continues to meet via teleconference approximately every third week to
propose updates to the IBIS standard, to help new participants, and to advance the standard. The Forum
also meets in person about four times a year to exchange ideas and conduct official business.
Most of the Forum activities are handled through e-mail discussions using a reflector "ibis@eda.org." A
users group reflector "ibis-users@eda.org" is also supported for users of IBIS. One can get more
information on subscribing to the reflectors and to other ongoing Forum activities through the official
web page: "http://www.eigroup.org/ibis/ibis.htm". The process of making changes and improvements to
IBIS is through a "BIRD" (Buffer Issue Resolution
Document) process involving approval by the Forum voting members. Over the years the Forum has
grown to over thirty voting members (requiring a modest yearly fee for administrative support), but the
Forum also maintains an open, public communications policy and welcomes all interested participants
regardless of membership status.
Through official EIA and ANSI (American National Standards Institution) public letter ballot
processes, IBIS Version 2.1 was ratified as ANSI/EIA-656 in December 13, 1995. Version 1.1 of IBIS
focused on TTL and CMOS logic components. Although never officially ratified as a national standard,
IBIS Version 1.1 served as a basis for advances in Version 2.1 to increase its accuracy and number of
device types that are supported.
Version 2.1 contains the following advances:
– Controlled slew rate devices
– ECL and PECL technologies
– Independent control over power rails so RS232 and other types of devices with multiple rails can be
modeled
– Differential drivers and devices
– Open-drain I/O devices such as open drain and open collector devices
– Expanded package model definitions to include coupling between pins.
The Forum also voluntarily funded a parser development activity through the sale of source code
licenses of "ibischk2" and has made executables of the parser code freely and publicly available to
enable IBIS model checking.
Industrial advances associated with new semiconductor topologies, package design and measurement
needs kept the Forum busy proposing new capabilities, eventually leading to IBIS Version 3.2. Again
through official EIA and ANSI public letter ballot processes, IBIS Version 3.2 was ratified as
ANSI/EIA-656-A on September 21, 1999.
Its advances include the following:
– Series and series switch models
– Multi-stage driver capability for phased stages
− 6 − 62014-1 IEC:2001(E)
– Submodel capability supporting dynamic clamps and bus hold functions for active and dynamic
terminations
– More specification values for overshoot and pulse immunity
– Uncoupled packages with sections and forks
– Uncoupled advanced packages known as electrical board descriptions with sections, forks and on-
board components.
IBIS Version 3.2 has complied with an original Forum objective that all subsequent versions of IBIS be
backward compatible with previous versions.
The Forum funded through voluntary source code license purchases the corresponding "ibischk3" parser
and has made its executables freely available.
The IBIS Standard has achieved wide spread national and international support and recognition as
indicated by over 40 semiconductor vendors providing IBIS models freely from their web sites. Many
more IBIS models and libraries are available from commercial vendors and directly through IC vendor
sales organizations. While IBIS models can be of value in all phases of a design and analysis process,
they are particularly suitable for printed circuit board design tools used in conjunction with the
corresponding physical and mechanical data bases describing the boards.
Future IBIS Directions
Technology continues to advance, forcing more stringent electrical requirements and newer ways of
doing things. The Forum is keeping up with such advances. However, its strategy has shifted. Up to now
the Forum has been adding to the existing fixed-format IBIS document. Such a process is slow and
subject to unexpected interactions with existing capability. The newer approach is to create a
compatible macro-language that allows more rapid reconfiguration and response to changing needs.
While the Forum has not yet ratified any of these approaches, it is pursuing these projects:
– A macro-language that fully supports IBIS Version 3.2 but can also support more advanced features
and nodal component structures
– A separate Connector Specification with advanced coupled stages to support key component used to
connect printed circuit boards (and possibly be used for more advanced package models)
– Some further advances in specification details beyond IBIS Version 3.2.
These projects advance the capability of IBIS in a manner that supports the existing IBIS Version 3.2
functionality, but also allows for much more rapid implementation of new requirements.
References
ANSI/EIA-656: IBIS Version 2.1 released December 13, 1995
ANSI/EIA-656-A: IBIS Version 3.2 released September 21, 1999
62014-1 © IEC:2001 – 7 –
ELECTRONIC DESIGN AUTOMATION LIBRARIES –
Part 1: Input/output buffer information specifications
( IBIS version 3.2 )
Scope and object
This standard gives specifications for electronic behavioral of digital integrated circuit input/ output
analog characteristics. It specifies a consistent software-parsable format for essential behavioral
information.
The goal of this standard is to support all simulators of all degrees of sophistication.
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