Richard Crossley wrote:
> Hi,
>
> Been a while since I had to get my hands dirty and do any electronics design
> so hopefully this will have an obvious answer.
>
> I have three lines of 3.6V logic that I need to translate to around 15V
> levels, two of which also need to drive high voltage FETs so they really
> need to be able to both sink and source to overcome the gate capacitance and
> achieve reasonable (sub microsecond) switching times (I know 15V drive for
> the FET is 'overkill' but there is a lot of legacy CMOS logic in the
> system). The board area is very pushed for size so I was hoping there would
> be some monolithic interface circuit that could achieve this rather than
> discrete components.
If you have a 5V supply availible and the 3.6V logic can supply 
sufficiant current then a 74LS06 or 74LS07 (the only difference is one 
is inverting the other isn't) running on 5V and with a pullup to 15V on 
the outputs would do nicely for getting the levels to 15V.

As for the FET drive your best option is probablly a 15V CMOS buffer.


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