USB-6001 I/O voltage

[Alubeiro]

Hi everybody,

The reference manual of the USB-6001 says in page 9 that the I/O voltage is 5Vdc.

I am thinking on using it to test a PCB where the microcontroller is powered to 3.3Vdc so the question is, ¿is it possible to connect the I/O power input to 3v3 instead os 5Vdc?

Thanks and best regards

[K C]

Hi, 

The specifications says (page 3) that the input high minimum voltage is 2.0V. So it should be no problem connecting it to 3.3V device.

Kees

[Alubeiro]

Hi again,

I forgot to put a couple of things.

What the hell is the pin +5V of the right connector for?

In page 23 it seems that the 5V come from the USB but in page 7 it looks like it isn't and that this pin is for power the module.

Any help will be apreciated.

Thanks and best regards

[Alubeiro]

Hi K C

Thanks for your quick  response but i can't find this information in anywhere, ¿which document are you looking at?

I have   http://www.ni.com/pdf/manuals/374369a.pdf               and also the reference manual.

Best regards

[K C]

At page 4 of the link you posted. Although there it says Vih = 2.3V but still OK for you.

I cannot find the document anymore I found a few hours ago.

Kees

[Alubeiro]

Hi K C,

This Vih = 2.3V is the minimun voltage level to determinate a logic 1 and the Vil = 0.8V is the maximun voltage level to determinate a logic 0.

The input voltage range applied to input pins must be  between 0V and 5V.

My doubt is about the power supply in 15th pin. This is:

- What is the range of the supply voltage? it must be 5V or can be 3v3 as well?

Thanks and best regards

[K C · Accepted solution]

The 5V pin is an output. The 6001 is powered by the USB interface.