One could take the NASA approach, wherein they thoroughly characterize
every component they buy for use in their outer-space conditions, since
the manufacturer does not do so.
They also have to redo this exercise if the part design or manufacturing
process is changed at all.
On 5/19/16 8:38 AM, Jeff Walton wrote:
It would be nice if the HV5622 manufacturer would provide guidance for 5V operation in addition to
12v, but I suppose that is not their target market. With CMOS chip design it is likely a speed /
noise / timing issue more than anything else and there are many designs that successfully use these
parts at TTL logic levels and lower clock rates. The internal technology is certainly capable of
operation at 5V with good waveforms and the timing is not tight. It would be surprising if anyone
is attempting to "select" chips for their products and more likely that the timing data
just needs to be restated. The manufacturer is going to always try to yield and test at the high
end of the spec because that is the competitive nature of "specsmanship".
--
David Forbes, Tucson AZ
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