On Mon, 20 Mar 2017 19:24:23 +0000, "Grasso, Charles" <[email protected]> wrote:
> Aside from the obvious air discharge tests around the SD card slot (with and > without the SD card installed) are there > any concerns regarding the ESD performance of the SD card during INSERTION? Only a guess... SD card may be charged before insertion, and may cause discharge from those contacts when inserted. This situation may slightly similar to that simulated with charged device model (CDM), and the discharge may be much faster than that of IEC 61000-4-2 and ISO 10605. However, it's capacitance is low, and I think it will not become a serious problem in general. In case of Compact Flush card, I ever heard of a case where metalized label on the card created an unexpected path for electrostatic discharges and caused a problem when hold by hand and inserted to a device. Regards, Tom -- Tomonori Sato <[email protected]> URL: http://t-sato.in.coocan.jp - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
