TCA9511A: Please help us to find the similar solution as TCA9511A

Helen Lin

Prodigy 120 points

Part Number: TCA9511A
Other Parts Discussed in Thread: TCA9517

Hi TI teams,

We are searching for the solution about component for isolate and level shift.

In this diagram as below, we use TCA9511A in this application. However, we found that the VOL(MAX) will be around 0.4V.

In the input side we need to keep under 0.4V. But it seems that will around 0.6V+0.1V (off set).

Please help us to find the solution for this. Thanks.

Helen

over 2 years ago

0 Jack Guan over 2 years ago

TI__Mastermind 41596 points

Hey Helen,

Before I can give a more accurate answer- Could you clarify where the 0.6V+0.1V offset as well as the input side under 0.4V requirement coming from?

Is the 1.8V on TCA9517 for VCCB? If so, this will not work as VCCB only accepts voltage from 2.7V to 5.5V. Instead, you can connect the B side to the TCA9511A but need to make sure that VOL of the TCA9517 is lower than 0.6V to avoid activating the rise time accelerators on the TCA9511A when propagating signals from B side to A side.

Regards,

Jack