Hiya, Does anyone know how to achieve this without any extra ‘control’ lines, and/or are there any ICs that do this? Basically you’ll end up with: ______ ______ ______ | 3.3v | 3.3v | lvl | 5v/TTL | 5V | | |---------------|shift |---…

http://www.maxim-ic.com/appnotes.cfm/ap … umber/3007 Those do the job nicely… ^^ http://media.maxim-ic.com/images/appnot … 7Fig04.gif

You can also just use a single FET as a bidirectional level shifter … like the 3370 but without the extra anhancements. I think either Maxim or TI has an app note on the subject.

Use Bus Switches, Iâ€™ve used this without any problem when I need have my 3.3v devices talk to my 5v TTL logic. How to guide. http://www.idt.com/products/getDoc.cfm?docID=7530 I’ve used IDTQS3245SO part from Mouser.

The document wiml was alking about can be found here: http://www.standardics.philips.com/supp … n97055.pdf That’s great cause it only needs a singe FET. The pull-ups are in place for the I2C bus, and not required for ‘other’ systems unless their lines are driven open-collector.

I bought a bunch of max3378’s to do exactly what you want, arbitrary voltage translation, just set each side to what ever voltage you want (within spec of course) You may also have luck with the 74LVXC3245, but they have a fixed voltage and are a bit harder to use

TI also has an I2C-Bus and SMBus Voltage Level-Translator. http://focus.ti.com/docs/prod/folders/p … a9306.html we have used it as an i2c level shifter. we have also used max3371 for rs232 compatible level translation. both products are doing their jobs very well. but max3371 [2.2$] is expensive…

Hello everybody, I have the same problem but with one difference, I live in Colombia and some os those components (Max… Mosfets) are not avaliable here so is there any way of doing a translator with simple transistors and resistors? The document I found here in other topic “Two Transistors Form Bi…

sebaspc: Hello everybody, I have the same problem but with one difference, I live in Colombia and some os those components (Max… Mosfets) are not avaliable here so is there any way of doing a translator with simple transistors and resistors? The document I found here in other topic “Two Transist…

Bi-directional 3.3v <-> 5v level shifting...

Wireless & IoT

wiml October 3, 2006, 4:43am 10

Places like [DigiKey will ship to Colombia (of course you end have to pay international shipping rates which are pretty high… :shock: )](http://www.digi-key.com/)

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Bi-directional 3.3v <-> 5v level shifting...

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