yes i saw the ROC. my main reason for loosely interpreting the max ratings and going with something within that range was to reduce components (for level shifting and what not). I imagine the better way for me to interpret is to think that the closer I get to the MAX ratings the more likely it could fail. I think for my next clock with these chips I'll get closer to ROC and do things "right". but for now i'm a few volts within the MAX ratings so hopefully all is good and things continue working OK. This is, as you mentioned, for home use so I don't have to worry too much if it fails.
this clock in question is here https://hackaday.io/project/46429-nixie-clock-3 I do have room for the additional components to get things to ROC but didn't at the time think it necessary. However theres always NEXT TIME ! :) thanks for the info... very helpful! On Sunday, February 25, 2018 at 1:51:29 PM UTC-8, Tomasz Kowalczyk wrote: > > This was taken fron Absolute Maximum Ratings. There is a note right under > them: > "Notice: Stresses above those listed under “Absolute Maximum Ratings” may > cause permanent damage to the device. This is a stress rating only, and > functional operation of the device at those or any other conditions above > those indicated in the operational sections of this specification is not > intended. Exposure to maximum rating conditions for extended periods may > affect device reliability." > > Right under that there are Recommended Operating Conditions, which clearly > state VDD 10,2-13,8V and logic input between VDD-2V to VDD. So if it works > at 3,3V logic, then good for you, but if something unexpected happens, then > manufacturer takes no responsibility, as you use it out of Recommended > Operating Conditions. > > Shortly speaking, area between ROC and AMR is treated like "it won't burn, > but it doesn't have to work". AMR is the limit of permanent damage of the > chip, while ROC determines range in which manufacturer guarantees, that > information found in the datasheet will be accurate. > > So it is up to you. If the clock is running at your home, then an > unexpected failure won't be a disaster. But I would never sell a clock with > parts operating out of specifications. > > W dniu niedziela, 25 lutego 2018 22:26:41 UTC+1 użytkownik mchan napisał: >> >> This thread was from a few months ago but wanted to add something. First >> those chips are pretty cool due to their size so i'll have to try soem at >> some point. >> >> Secondly people keep saying the HV5530 needs 12V logic. I've run these >> at 3.3V and all seems to be good. I based this on the data sheet where it >> said Supply Voltage, VDD –0.5V to +15V >> >> then Logic Input Levels –0.5V to VDD+0.5V >> >> I interpreted that as plus or minus a half volt to the 3.3V it's running >> at. Have I got that wrong and the fact it's "working" is a bit of a fluke >> ? :) >> >> >> >> >> >> >> >> On Saturday, October 28, 2017 at 10:33:45 AM UTC-7, SWISSNIXIE - Jonathan >> F. wrote: >>> >>> >>> Hi folks, >>> >>> We all know the PLCC Style HV-Drivers from Microchip, for example HV5530. >>> All of them require a +12V Data Signal according to datasheet, but yet >>> the run in some circuits with even 5V data signals.. >>> >>> >>> While browsing microchips website i found HV5523/HV5623. >>> http://ww1.microchip.com/downloads/en/DeviceDoc/hv5523.pdf >>> >>> Those are fast 16Mhz registers with 5V logic data and can switch up to >>> 220V@100mA per Channel and come in a very small QFN package. (Attached an >>> image to PLCC for comparision) >>> I will definitly order some of them to test :) they would help to make a >>> very slim and thin clock board :) >>> >>> >>> >>> Has anyone experimented with them already? Something to know? >>> >>> >>> -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/2f6b8f26-6213-4762-8945-d551142ae367%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
