Standard Delay Format (SDF) is an

IEEE The Institute of Electrical and Electronics Engineers (IEEE) is a 501(c)(3) professional association for electronic engineering and electrical engineering (and associated disciplines) with its corporate office in New York City and its operati ...

standard for the representation and interpretation of timing data for use at any stage of an electronic design process. It finds wide applicability in design flows, and forms an efficient bridge between dynamic timing verification and

static timing analysis Static timing analysis (STA) is a simulation method of computing the expected timing of a synchronous digital circuit without requiring a simulation of the full circuit. High-performance integrated circuits have traditionally been character ...

. It was originally developed as an

OVI OVI may refer to: * Ohio Volunteer Infantry, volunteer regiment during the American Civil War * Operating a Vehicle under the Influence (of alcohol and/or drugs) * Optically Variable Ink, anti-counterfeiting measure in currency * Open Verilog In ...

standard, and later modified into the

format. Technically only the SDF version 4.0 onwards are

formats. It is an

ASCII ASCII ( ), abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices. Because ...

format that is represented in a tool and language independent way and includes path delays,

timing constraint Timing is the tracking or planning of the spacing of events in time Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is ...

values,

interconnect delay In telecommunications, interconnection is the physical linking of a carrier's network with equipment or facilities not belonging to that network. The term may refer to a connection between a carrier's facilities and the equipment belonging to ...

s and high level technology parameters. It has usually two sections: one for interconnect delays and the other for cell delays. SDF format can be used for back-annotation as well as forward-annotation. See also:

VITAL Vital or Vitals may refer to: Places * Vital Creek, a creek located in the Omineca Country region of British Columbia * Vital Range, a subrange in the Omineca Mountains in British Columbia People *Vital (given name) *Vital (surname) Arts, ente ...

EDIF EDIF (Electronic Design Interchange Format) is a vendor-neutral format based on S-Expressions in which to store Electronic netlists and schematics. It was one of the first attempts to establish a neutral data exchange format for the electronic desig ...

References

* **IEC 61523-3:2004

External links

*https://web.archive.org/web/20130524215112/http://www.eda.org/sdf/
Standard Delay Format Specification in PDF format, version 3.0 (1995)
EDA file formats IEEE DASC standards IEC standards {{standard-stub