PMBus™ Specifications

Current published specs (PMBus 1.2)

The current PMBus specification is available to all upon request.

SMIF members in good standing can download the current PMBus specification from the Members Specifications page.

All others can get the PMBus specification by sending an email to GetPMBusSpec@SMIForum.org.

Be sure to include your request, your full name, and your company name in text in English in the body of your email.

Note: We may use the email address you supply to contact you regarding PMBus.

Normally, the current PMBus specification will be delivered to you by email before the end of the next business day.

See also

• PMBus Revision 1.2 Presentation: PMBus: Coming to a Server Near You 2010-02-28 (36 slides, .pdf, 185 KB)

PMBus technical resources can be found in the PMBus Developers Zone. Additional resources are available to SMIF members and PMBus adopters in the members areas of this site, accessible through the PMBus Members page.

Technical questions about the PMBus standard and specification should be emailed to techquestions@smiforum.org.

Older published specs (PMBus 1.0 & 1.1)

• PMBus Specification Part I Rev. 1.1 Final 2007-02-05 (.pdf, 238 KB)
• PMBus Specification Part II Rev. 1.1 Final 2007-02-05 (.pdf, 787 KB)
• PMBus Specification Part I Rev. 1.0 Final 2005-03-24 (.pdf, 225 KB)
• PMBus Specification Part II Rev. 1.0 Final 2005-03-28 (.pdf, 675 KB)

Working groups

The PMBus working groups are advancing the PMBus specifications. Joining SMIF and becoming a PMBus adopter allows you to particpate the working groups, and provides a mutual license to the resulting specification. To apply to join SMIF and the PMBus group, follow the instructions on the Join PMBus page.