Use a 74LV14 and power it with 3.3V

Friendly Regards

Octavio Nogueira
===================================================
nogueira@propic2.com                  ICQ# 19841898
ProPic tools - low cost PIC programmer and emulator
http://www.propic2.com
===================================================
-----Mensagem Original-----
De: "Giorgio Alboni" <rac1337@PROVINCIA.RA.IT>
Para: <PICLIST@MITVMA.MIT.EDU>
Enviada em: Domingo, Fevereiro 06, 2000 07:54
Assunto: How connect 5V I2C master with 3.3V slave?


> I have a I2C master that work with 5.0 volt and a 3.3 volt slave.
> The master is a pic16C84 and the slave is a cmos sensor. I can't use the
> open connector pin RA4 of pic. I use a portB pin.
> How can I resolve the voltage problem?
> Can work this circuit?
>
>
> -----                                                    -----
>     |     56K                         I2C DATA LINE      |
> PIC |---/\/\/\-------------------------------------------|CMOS
>     |                        |                           |
> -----                       ---                          -----
>                             \ / Diode
>                              -
>                              |
>                     ?        |           ?
>       (5V)VCC----/\/\/\----------------/\/\/\-------GND
>                             2,8volt
>
> T.I.A.
> Alboni Giorgio