Hi, Alot of IC manufacturers do not specify the maximum transient voltages allowable on their digital inputs. However, what they do specify is the maximum peak current that the input can take. How do you calculate this current when you have a value for the overshoot at an input to a device? Cheers Steven Whitaker ******************************************************************************************************* The information contained in this e-mail is confidential. It may also be legally privileged. It is intended only for the stated addressee(s) and access to it by any other person is unauthorised. If you are not an addressee, you must not disclose, copy, circulate or in any other way use or rely on the information contained in this e-mail. Such unauthorised use may be unlawful. If you have received this e-mail in error, please inform RACAL INSTRUMENTS LTD. immediately by phoning +44 (0)1628 604455 (ask for the I.T. dept) and delete it and all copies from your system. ******************************************************************************************************* ------------------------------------------------------------------ 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 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