TUSB1044: Could you tell me ABS max ratings of SCL pin and SDA pin?

K.Yaita

Part Number: TUSB1044

Hi Team,

Could you tell me ABS max ratings of SCL pin and SDA pin?
I would like to know if is it possible to apply voltage to these pins when power supply of TUSB1044 is off.

Is it same as the following CMOS inputs?
If the answer is yes, I believe it is no ploblem to apply voltage to SCL pin and SDA pin when power supply of TUSB1044 is off.

Best Regards,
Yaita / Japan disty

over 7 years ago

0 Diego Cortes over 7 years ago

TI__Mastermind 36085 points

Hello Yaita-san,

I am looking for the data and provide the answer as soon as I find it.

Regards,
Diego.

0 Diego Cortes over 7 years ago

TI__Mastermind 36085 points

Yaita-san,

The I2C in the TUSB1044 interface is compliant, please refer to the I2C spec here.

Regards,

Diego.

0 K.Yaita over 7 years ago in reply to Diego Cortes

Guru 29720 points

Hi Diego-san,

I found the following in page 47.
>[2] Maximum VIH = VDD(max) + 0.5 V or 5.5 V, which ever is lower. See component data sheets.

So I believe we shouldn't apply voltage to SCL pin and SDA pin when power supply of TUSB1044 is off.
Is my understanding correct?
I would like to confirm just in case.

Best Regards,
Yaita

0 K.Yaita over 7 years ago in reply to Diego Cortes

Guru 29720 points

I posted above, please confirm the content.

0 David (ASIC) Liu over 7 years ago in reply to K.Yaita

TI__Guru**** 176421 points

Yaita-san

The SCL and SDA pin of TUSB1044 are failsafe. You can still pull them up to 3.3V even when TUSB1044 power is off.

Thanks

David

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TUSB1044: Could you tell me ABS max ratings of SCL pin and SDA pin?