At 01:36 PM 2/9/2004 -0500, you wrote:
>Regarding the 4049/4050 option, you state that the Vdd must be 5V on
>this chip.
>Does this mean that this chip can only be used when converting 5V CMOS
>to the PIC?

Yes, as I also said earlier ;-)
"A MC14504 will convert from PIC to 4000 CMOS
(hex level shifter). It can go the other way too, but the
4040/50 are cheaper."

You can only go one way with each chip because you have to
connect Vdd to the desired OUTPUT level. Each handles 1-6 signals. A
4049/4050 will not do the low to high conversion in any case.

Going from low to high, fast, and with extremely low power consumption is the
difficult conversion.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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