On 1/27/2011 3:51 AM, Wouter van Ooijen wrote:
>> I would go the three sets of MOSFET route plus two resistors per mosfet.
>> One of those dual jobbies made as ballast inverter drivers would do the
>> trick.
> I know that solution, but I prefer one chip to a bunch of fets plus
> resistors.
>
>> As an aside I'm surprised at how cheap RS are for the octal 74LVC4245A b=
us
>> transceiver  0.49c each minimum order 5!
> Now it would be nice if there were a similar chip with 4 in each
> direction, fixed direction would be OK.
>
There is: LM239, quad comparator, at $0.25 a device. These are=20
reasonably fast. I am using one now
for an MMC card interface.

--Bob A

--=20
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