LSF0102: Need one I2C Level translator with Vol higher than 0.4V

Vishnu K

Prodigy 40 points

Part Number: LSF0102
Other Parts Discussed in Thread: TCA9800,

Hello all,

Could you please suggest an I2C level translator which have Vil (Input Low) greater than 0.4V?

The source microcontroller I2C actually have VOL of 0.45V, that is the reason.

over 2 years ago

0 Clemens Ladisch over 2 years ago

Guru 317000 points

LSF and TXS voltage translators work like an analog switch; see [FAQ] Why are the TXS01xx VIH/VIL specifications so stringent?

Use a buffered translator like the TCA9800/1/2/3.

0 Vishnu K over 2 years ago in reply to Clemens Ladisch

Prodigy 40 points

Hello Clemens,

Thanks a lot. Do you know any buffered level translator with exact pinout of LSF0102 ?. We already fabed out.

0 Clemens Ladisch over 2 years ago in reply to Vishnu K

Guru 317000 points

There is no buffered translator with the same pinout.

What is the test condition of that 0.45 V value? It is likely that the actual current is smaller, and that the actual V_OL also is smaller. Furthermore, even if the LSF input voltage is higer, this will just increase the output voltage (see the FAQ linked above), which is usually not a problem for I²C devices.

Logic

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LSF0102: Need one I2C Level translator with Vol higher than 0.4V