No 5V supply, just 3.6V and 15V.

A push-pull output would be way preferable to an open collector output to
get the FETs switching at a good speed, I'm really looking for a single chip
solution if at all possible.

Cheers,

Richard.

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On
> Behalf Of peter green
> Sent: 02 November 2008 12:47
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE] 3.6V logic to 15V
> 
> 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.
> 
> 
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist


-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist