PCA9306: Relation graph for Vin and Vout

Satoshi-san,

I will look into this for you, but for the PCA9306, it will depend on the voltages at VREF1 and VREF2, since both sides are referenced to these levels and the thresholds are set based on these reference voltages. If both VREF1 and VREF2 were equal to each other, that might prove to be meaningful, what kind of information are you wanting to get from these plots?

And also, were these plots take with the same pull up on both sides? If I can't find anything, I can measure this data myself.

Regards,

Eric-san

Thank you for reply,

I answer your question, please see below;
①About Vref1 and Vref2
　Customer condition is "Vref1=1.8V±％2.5" and "Vref2=3.3V±％2.5"
②Pull up resistor
　Both side are 560Ω±％1
③Background for this plot
　Customer want to check Vin/Vout spec for between Master and Slave.

If you find the point of better to change, please change this point. (For example, pull up resistor value, etc)

Best regards,
Satoshi

Eric-san

Do you have the necessary information to other?

Best regards,
Satoshi

Satoshi-san,

Apologies for the delay, I found a PCB to test this on today. Is there any way you can send me the test setup used for these measurements? I want to verify I have the exact setup so I can get the same plots. Maybe a quick block diagram, nothing too detailed. If not, answering the questions below would help.

• How is the EN pin connected?
• When sweeping the VIN voltage from 0V to the VREF voltage, do you have the VOUT side pulled up? That is, when sweeping the SCL1/SDA1 voltage, do you have SCL2/SDA2 pulled up to 3.3V?

Regards,

Eric-san

Thank you for update.

Sorry, I don't know test condition for before attached graph.
I answer your question below,
・EN pin is connect to Vref2.
・Vout side pullup is 3.3V and 560Ω.

If there any problem on above condition, please revise test condition.

Best regards,
Satoshi