SRC Forum - Message Replies
Forum: Reliability & Maintainability Questions and Answers
Topic: Reliability & Maintainability Questions and Answers
Topic Posted by: Reliability & Maintainability Forum
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998
Posted by: XiangPing,Wu
Date posted: Sun Apr 16 22:49:34 US/Eastern 2000
I have bought a book of Worst Case Circuit Analysis Application Guidelines from RAC. I wonder where the figure 13 on page 71 and figure 14 on page 72 are from? Are they provided by the device vendor?
Subject: WCCA Data Sources
Reply Posted by: Jack Farrell
Organization: Reliability Analysis Center
Date Posted: Mon Apr 17 8:28:06 US/Eastern 2000
Figure 13 Temperature Effects on Propagation Delay - Most vendors supply propagation delay information based on a temperature range from -55C to +125C. If the rated qualifying temperature specified is beyond the boundaries of your analysis Section 188.8.131.52 (pg 32) of your WCCA book provides an adjustment formula.
Figure 14 Power Supply Effects on Propagation Delay - Most vendors publish the operating supply voltage range required for operation. However, very few vendors’ detail the effects of varying supply voltage on propagation delay. Section 184.108.40.206 (pg 32) of your WCCA book provides some guidelines for adjusting propagation delay vs. supply voltage.