Design support, If VCC =3.3V and data inputs/outputs supports 1.8V

Dineshkumar R

Part Number: Switches & multiplexers forum

Tool/software:

Hi,

I have doubts on SN74CB3T3245. I am planning to provide VCC voltage, will be 3.3V and my I/O lines will be 1.8V tolerant on both ports A and B. I need confirmation that I/O communication will work without issues when I am providing VCC = 3.3V. Also, confirm that any voltage translation is happening during the process.

1 month ago

0 Dineshkumar R 1 month ago

Prodigy 80 points

Also, let me know the max frequency support of SN74CB3T3245.

0 Katy West 1 month ago in reply to Dineshkumar R

TI__Intellectual 2765 points

Hi Dineshkumar,

Yes, the switch will be able to pass 1.8V signals on the I/O lines while being powered by 3.3V. In this case, the IOs would not be shifted as seen from this application curve.

This device does not have a frequency spec'ed.

Best,
Katy