It's not necessary. The HV5530 is a CMOS chip, so its low and high logic thresholds are 30% and 70% of whatever the VCC happens to be. It only needs to be run at 12V if you want to meet the datasheet specs for maximum clock rates (8MHz). I have never seen a nixie clock design that clocks out at more than 2MHz, and it works quite well at 3.3V at that frequency. My only concern about supply voltage is whether it's high enough to turn on the output HV FETs properly, so I wouldn't run it at less than 5V.
On Tuesday, May 10, 2016 at 4:44:39 PM UTC-7, gregebert wrote: > > Is there a level-shifter going into the HV5530 to drive the inputs to +12V > ? I've heard some folks are driving at 5V or 3.3V levels, which doesn't > meet datasheet specs. > > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/ec7c8f8b-c69f-46f0-a1fb-246c9a31b55d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
