TX0304 driver capability for 15cm

Lucifer

Other Parts Discussed in Thread: TXB0304

we uses TX0304 SPI interface for 1.8V ó 3.3V application, however the distance of the daughter card to main board is about 15cm.

I think we need a buffer between both side, could you help suggest a suitable SPI buffer for me? Thanks.

over 10 years ago

0 Jennifer Joseph over 10 years ago

TI__Intellectual 2530 points

What load is being driven? Please advice.

The TXB0304 can drive 70pF loading. You should add the known load and the lumped capacitance from pcb as calculated from below.

The rule of thumb for PCB trace inductance is 20nH per inch, Typical PCB trace has a DC resistance of 12 milliohms per inch ,Typical capacitance for PCB is 3pF per inch

I will look into the buffer recommendation.

Thanks

0 Lucifer over 10 years ago in reply to Jennifer Joseph

Expert 2600 points

Dear Sir,

this level shift ic is between MCU and Flash, Thanks.

Logic

Logic forum

TX0304 driver capability for 15cm