DS90UB926Q-Q1: PDB pin

Vijay Balaji

Hello Team,

In DS90UB926Q-Q1 Deserializer, PDB pin is given pull up with 10K resistor. But the voltage in the IC received is 1.2V only.

I have changed 10k to 4.7K resistor, but the voltage received is same.

Can you suggest any solution for this.

over 2 years ago

0 Josh Baik over 2 years ago

TI__Mastermind 22936 points

Hi Vijay,

What is the voltage supply for PDB pin? It is recommended to place with pull-up 10kohm and pull-down >= 4.7uF. Please refer to the Typical Connection Diagram of the datasheet.

Best,

Josh

0 Vijay Balaji over 2 years ago in reply to Josh Baik

Prodigy 130 points

Hi Josh,

As per the datasheet the voltage supply of VDD33_B is given to PDB pin with 10K pull Up and a 4.7uF cap.

0 Josh Baik over 2 years ago in reply to Vijay Balaji

TI__Mastermind 22936 points

Hi Vijay,

Could you check if the cap for the voltage supply would be placed properly? Have you ever checked what voltage is measured on VDD33_B? Could you share the schematic?

Best,

Josh

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DS90UB926Q-Q1: PDB pin