Hi,=0AI am not sure whether I can post this query in this forum !!!=0A=0AI = have a board, where there are almost 70+ IC's in the board (SDRAM, Process= or, Ethernet Phy etc..).=0AThe problem I am facing is that, the CPLD is get= ting burnt. The Failure rate is almost 3%. The CPLD used is MAXII 1270 from= altera (The VCCINT is 3.3V, using the device with internal regulator)=0A= =0ADid any of you come across the similar issue??. If yes what is the solut= ion arrived at?=0AThe problem is there in multiple of our designs. And the = problem happens only during power cycle (not sure whether during power up o= r power down).=0A =0AI observed the power supply fall time is of order 200u= s (Very fast discharge) and rise time is order 1ms.=0AThe undershoot in the= 3.3V power supply is only -0.3V during power down.=0A=0AThanks in advance= =0Asrao=0A=0A=0A=09=09=0A__________________________________________________= ________=0AYahoo! India Answers: Share what you know. Learn something new= =0Ahttp://in.answers.yahoo.com/ ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu