Hello Jim,
hm, that knowledge base article must be wrong: The octoclock internally only has a 3.3V supply. But before I say something wrong here, let me check back. Best regards, Marcus On 11.06.21 14:17, Jim Palladino wrote: > Hello, > > We are planning on using an octoclock with several devices, including an > N320. The > octoclock outputs a 5V 1pps signal, but I'm confused about the N320 1pps > input. > > According to (https://kb.ettus.com/N320/N321): > "PPS - Pulse Per Second Using a PPS signal for timestamp synchronization > requires a > square wave signal with the following a 5Vpp amplitude." > > If I look at the schematics for the N320, on page 15, > (https://kb.ettus.com/images/f/f4/USRP_N3XX_MB_Schematic.pdf) they show that > the input > 1pps signal goes through an NC7SV157. Vcc for that is 3.3V in the schematics. > > According to the datasheet, the absolute maximum rating on the input is 4.3V. > "https://www.onsemi.com/pdf/datasheet/nc7sv157-d.pdf"; > > So, I'm not sure how the N320 can safely accept a 5V input (from the > octoclock or other > device). > > Thanks, > Jim > > > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
