Hello,

 

I would like to convert the 1’8V from the I/O expansion port to 3’3V or 5V, so I have been seeking on Internet and I found two options:

 

-          TXS0108E: 8-Bit Bidirectional Voltage-Level Translator For Open-Drain And Push-Pull Application

http://focus.ti.com/docs/prod/folders/print/txs0108e.html

 

-          TXB0108: 8-Bit Bidirectional Voltage-Level Translator with Auto Direction Sensing and +/-15-kV ESD Protect

http://focus.ti.com/docs/prod/folders/print/txb0108.html

 

But I have a couple of questions:

 

1.- For the I2C and SPI should I use the TXS0108E (For Open-Drain And Push-Pull)

2.- For the rest of the pins should I use the TXB0108

 

 

Thank you for your comments.

 

 

Att,

mtz