TCA9509:"Figure 8-2. Typical Star Application" in the TCA9509 datasheet?

Hi Yuuki,

Do you need B-sides of each buffer connected together, or can you switch to A-sides? 

Regards,

Tyler

I would like to switch the master side and connect the slave side in parallel.
If I can switch the master side and connect the slave side in parallel, there will be no problem if A and B are switched.

Hi Yuuki,

Just to be clear, do you have a block diagram of your desired implementation? 

A-sides of TCA9509 cannot be connected together. Only B-B, B-A, A-B are allowed for this device. 

If you switch to something like the TCA9517A buffer, then B-B connections are NOT allowed. Only A-A, A-B, B-A connections are allowed. 

Regards,

Tyler 

Reference materials.pdf

This is a block diagram of the desired implementation.
Thank you in advance

Hi Yuuki,

Thank you for the detailed block diagram.

What are the VIL's for each device? Slave 1-6 and masters 1-2?

Regards,

Tyler

VIL(max)=0.99V. Thank you in advance.

Hi Watanabe,

Responses will be delayed for this query as Tyler is currently out of office. Thanks! 
Regards,

Jack

For the TCA9509, it is not recommended to use VCCA = VCCB for the power supply.
The recommended setting is "VCCA ≤ (VCCB – 1 V)".
Also, installing a pull-up resistor on side A is not recommended.
Therefore, please tell me about any devices other than the TCA9509 that can be used in the manner shown in the diagram.