Hi Kranthi, Usaually, they will provide maximum rise time as constraint not minimum rise time. Say example, http://www.freescale.com/files/32bit/doc/data_sheet/MPC603E7TEC.pdf MPC603E : Host Processor from freescale. They specify the max rise needs to meet 2ns requirement. Regards, Padmanaban -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of kranthi Sent: Wednesday, September 20, 2006 2:25 PM To: Padmanabanb@xxxxxx; 'silist' Subject: [SI-LIST] Re: Rise time impact on input buffer Hi padmanaban, I think the receiver side rise or fall time constraints are specified such that any edge in that range will not result in a shoot that is not in the maximum specified shoot levels of the receiver IC and will be detected as transmitted.If iam wrong, please correct me. kranthi -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of Padmanaban Balamuraleedharan - TLS, Chennai Sent: Wednesday, September 20, 2006 12:42 PM To: silist Subject: [SI-LIST] Rise time impact on input buffer Hi all, It's clear that fast rise(short) will create EMC problem or shoot = problem if it is not properly terminated? Will rise time have any impact on the receiver side, I mean sensing in the logic level by receiver? Why are Manufacturers of IC specifying receiver rise or fall time constraints? = What is the rise time impact in the receiver side? __/---- __/----=09 |\______________|\ |/ |/ Driver Receiver One of my guess is Slow rise (long) time signal will dissipate more = power in the buffer stage of CMOS IC and leads to metastability in the next = stage. Is my guess correct? Thanks in advance. Regards, Padmanaban DISCLAIMER=20 The contents of this e-mail and any attachment(s) are confidential and = intended for the=20 named recipient(s) only. It shall not attach any liability on the = originator or HCL or its=20 affiliates. Any views or opinions presented in this email are solely = those of the author and=20 may not necessarily reflect the opinions of HCL or its affiliates. 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