TCA9536: About the VCC to GND capacitor

Luke Sakamoto

Part Number: TCA9536

Hi team,

In the typical application of the datasheet, there is no capacitor between VCC to GND.

However, on the EVM, there is a capacitor, 100nF.

Would you typically recommend a capacitor here? which design should customer follow?

Thanks,

Luke

0 Clemens Ladisch over 1 year ago

Guru 316380 points

The capacitor is required. The typical application schematic is wrong.

0 Tyler Townsend over 1 year ago

Hi Luke,

Yes this is a mistake on our end. I have taken a note to fix it.

Our layout example shows a decupling supply cap and its placement to VCC, but we negate the value of the cap here.

Luke Sakamoto said:
Would you typically recommend a capacitor here? which design should customer follow?

Customer should follow adding a decoupling cap to the supply line here. 100nF or 0.1uF cap close to the VCC pin is highly recommended.

Regards,

Tyler

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