IEC 60679-4:1997 pdf download.Quartz crystal controlled oscillators of assessed quality – Part 4: Sectional specification – Capability approval
1 General
1.1 Scope
This part of IEC 60679 applies to quartz crystal controlled oscillators as custom built products
or as standard catalogue items and whose quality is assessed on the basis of capability
approval.
It prescribes the preferred ratings and characteristics, with appropriate tests and measuring
methods contained in the generic specification, IEC 60679-1, and gives the general
performance requirements to be used in detail specifications for quartz crystal controlled
oscillators.
The concept of preferred values is directly applicable to standard catalogue items but does not
necessarily apply to custom built products.
1.2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 60679. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 60679 are encouraged to investigate the possibility of applying the most
recent editions of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 61178-1:1993, Quartz crystal units – A specification in the IEC quality assessment system
for electronic components (IECQ) – Part 1: Generic specification
IEC 60679-1:1997, Quartz crystal controlled oscillators of assessed quality – Part 1: Generic
specification
IEC 60679-4-1– Quartz crystal controlled oscillators of assessed quality – Part 4-1: Blank detail
specification – Capability approval 1)
2 Preferred values for ratings and guidance on detail specifications
2.1 Preferred values for ratings and characteristics
The values given in detail specifications shall preferably be selected from those stated in 2.3 of
the generic specification IEC 60679-1.
2.2 Information to be prescribed in detail specifications
(Applies to both custom built and standard catalogue items.)
Guidance on the preparation of detail specifications is given in the future blank detail
specification, IEC 60679-4-1.
Each detail specification shall state all the tests and measurements required for inspection. For
standard catalogue items this shall, as a minimum, include the relevant tests given in the blank
detail specification, with methods and severities.
The following information shall be given in each detail specification.
2.2.1 Outline drawing and dimensions
The detail specification shall include a dimensional drawing of the crystal controlled oscillator,
and/or reference to an appropriate international standard, to permit easy recognition and to
provide information for dimensioning and gauging procedures.
The dimensions shall include the overall dimensions of the body of the component, and the
size and spacing of the terminations. All dimensions shall be stated in millimetres.
Terminal connections shall be identified for all enclosures.
When a detail specification covers more than one enclosure, the dimensions and their
associated tolerances shall be placed in a table below the drawing.
When the configuration is other than described above, the detail specification shall state such
dimensional information as will adequately describe the crystal controlled oscillator.
2.2.2 Marking
The detail specification shall prescribe the content of the marking on the crystal controlled
oscillator and on the primary package in accordance with 2.4 of IEC 60679-1.
2.2.3 Ordering information
The detail specification shall prescribe that the following information is required when ordering
a crystal controlled oscillator:
a) quantity;
b) detail specification number, issue number and date, and where applicable;
c) type of oscillator (e.g. SPXO, VCXO, TCXO, etc.);
d) nominal frequency in kilohertz or megahertz;
e) frequency tolerance(s) and operating temperature range;
f) full description of any additional requirements to identify the oscillator.
IEC 60679-4:1997 pdf download
