TXS0102: TXS0102 and TXS0104 max capacitive load

Kelvin Tee

Part Number: TXS0102

Hi,

Do we have the max capacitive load these two translators can support?

From the datasheet and apps note, it never specified an absolute number.

https://www.ti.com/lit/an/scea044/scea044.pdf?ts=1694158703316&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fen-us%252Fdocs%252Funiversalsearch.tsp%253FlangPref%253Den-US%2526searchTerm%253DSCEA044%2526nr%253D48

Rgds
Kelvin

10 months ago

0 Jack Guan 10 months ago

TI__Mastermind 20701 points

Hey Kelvin,

This max capacitive load is relative to the data rate needed for your system requirements. With this in mind, we recommend the maximum capacitive load to be <70pF for the TXS family devices so the one shot circuitry does not time out before the signal is driven fully to the output rail.

Regards,

Jack

0 Kelvin Tee 10 months ago in reply to Jack Guan

TI__Genius 10035 points

Hi Jack,

The data rate is 400kHz. Do you have the chart for maximum capacitive load vs data rate?

Rgds,
Kelvin

0 Clemens Ladisch 10 months ago in reply to Kelvin Tee

Guru 260450 points

This sounds like I²C.

For the worst case, see I2C Bus Pullup Resistor Calculation; please note that the TXS already has internal 10 kΩ pull-ups, and that its edge accelerators will make it somewhat faster than that. You should add the footprints for external pull-ups, but it's possible that you do not actually need them.

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TXS0102: TXS0102 and TXS0104 max capacitive load