Two Level Shifters

Aaron Heng

Other Parts Discussed in Thread: LM71

Hi,

I have 32 LM71 devices on my motherboard, and I split into two banks: bank 1 - 16 devices and bank 2 - 16 devices. Each bank connects to one level shifter. Could you please check attached schematic if it is doable? It looks like that two level shifters fighting each other when I tried to read the SIO line. When I removed one level shifter then it read OK. Please advise.

Aaron

over 9 years ago

0 C. Ryan Land over 9 years ago

TI__Genius 9860 points

Moving to Voltage Level Translation forum.

Can you describe what you mean by "fighting?" Are the DIR pins ever floating?

0 Aaron Heng over 9 years ago in reply to C. Ryan Land

TI__Mastermind 32570 points

Hi Ryan,

When I want to read bank 1 from U6 or bank 2 from U9, I set DOUT_EN = HIGH, and both of my direction pins for both U6 and U9 to HIGH.

Aaron

Logic

Logic forum

Two Level Shifters