Wouter van Ooijen wrote:
> On 27/1/2011 12:07 PM, Geo wrote:
>  =20
>> Wouter van Ooijen wrote:
>>
>>    =20
>>> Now it would be nice if there were a similar chip with 4 in each
>>> direction, fixed direction would be OK.
>>>      =20
>> Would the 74LVC241 work?
>>    =20
>
> nice chip! solves the 5 - > 3v3 part.
>  =20
Change LVC to HCT in that part number to get a chip that will translate=20
the other way.
> why didn't I even see it when searching? probably because it isn't=20
> called a level shifter :(
>  =20
mmm, it's not specifically designed as a level shifter, it's just a 3.3V=20
logic chip with 5V tolerant inputs.

Similarly HCT is a 5V logic family with 3.3V compatible inputs (they=20
were originally designed to be TTL compatible inputs but the thresholds=20
work fine for 3.3V cmos signals as well).

You can use other chips from those families too allowing you to do logic=20
and level shifting at the same time.
--=20
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