TCA9802: Multi slaves and pin EN

albgarc2014

Part Number: TCA9802

HI TI,

There are some things that are not clear to me.

Can I connect multiple slaves as shown in the picture?
Can I connect EN directly to VCCA as shown in the picture?
If I keep EN floating the device is enabled?

Thank you very much. Best Regards

over 4 years ago

+1 Clemens Ladisch over 4 years ago

Guru 316380 points

Both the A and B sides can be connected to multiple devices. What matters is the total capacitance (see figure 21), which depends on the number of devices and the length of the traces.

The EN pin is a high-impedance CMOS input; connecting it directly to V_CCA is fine.

If the EN pin is open, it does not float because it has an internal pull-up.

0 albgarc2014 over 4 years ago in reply to Clemens Ladisch

Genius 3520 points

Hello,

Sincerely thank you very much for the great clarification.

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TCA9802: Multi slaves and pin EN