TPD7S019: Questions of TPD7S019

Jimmy Lai

Expert 6845 points

Part Number: TPD7S019

Dear Team,

Could you help to review the schematic as below? Thanks.

Many Thanks,

Jimmy

over 1 year ago

0 Alfie Cheng over 1 year ago

TI__Intellectual 1880 points

Hi Jimmy,

good, there are no problem. just curious, why DDC_IN1/2 are pulled up to 3.3V?

0 Jimmy Lai over 1 year ago in reply to Alfie Cheng

TI__Expert 6845 points

Hi Alfie,

DDC_IN1/2 is connected to I2C. I2C is an open-drain output, so a pull-up is added, but a 4.7K pull-up has been added to the source end to 3.3V;
Therefore, it is better to reserve the pull-up resistor of DDC_IN1/2 at the end. Thanks.

Many Thanks,

Jimmy

0 Alfie Cheng over 1 year ago in reply to Jimmy Lai

TI__Intellectual 1880 points

Hi Jimmy,

got it, good job.

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TPD7S019: Questions of TPD7S019