PCA9306: Voltage Transmission Issue

Matt Qi

Part Number: PCA9306
Other Parts Discussed in Thread: TCA9548A,

I have a question about the voltage transmission of the PCA9306DCUR:

If the I2C input of chip pin SCL1/SDA1 or SCL2/SDA2 has a low-level voltage (0.1V), will the other end of the chip corresponding to SCL2/SDA2 or SCL1/SDA have a low-level voltage (0.1V) or is it close to 0V?

over 2 years ago

0 Clemens Ladisch over 2 years ago

Guru 321890 points

This device is a passive switch. The output voltage will be the same as the input voltage (plus a small voltage drop over the switch resistance, depending on the current).

0 Tyler Townsend over 2 years ago

TI__Guru 58958 points

Hi Matt,

This question is similar to the TCA9548A thread you created. PCA9306 is a passive device like Clemens already stated. The input side voltage is different from the output voltage by and RDS_ON voltage drop x the pass through current of the internal switch.

Regards,

Tyler

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PCA9306: Voltage Transmission Issue