TXB0108: Input Current value

Y.Ottey

Part Number: TXB0108

Dear TI Team

We are considering voltage level conversion from 3.3V to 2.8V from B side to A side in the following form.

At this time, if there is data on the current value (current value drawn into the device) that is input to the B side when the voltage levels on the A side and B side are Low, please tell me.
(The data sheet only shows the input current value of the OE pin.)
Even if there is no current data for the above conditions, please let me know if there is a reference value when the input/output is low.

Best Regards,

Y.Ottey

over 5 years ago

0 Clemens Ladisch over 5 years ago

Guru 319620 points

When the device is idle (i.e., both A and B low), then you can use the same I_I value for other inputs.
(When the device is switching, i.e., A is still high, then the external device that drives B low must also sink the current through the 4 kΩ resistor. This happens only for a short time, until the A side is low.)

0 Y.Ottey over 5 years ago in reply to Clemens Ladisch

Mastermind 6145 points

Hi Ladisch

Regarding II, only OE is specified in the data sheet.

When both A and B sides are Low, is it acceptable to recognize that the B side input (current input to the B1 to B8 pins) is max. 2 μA?

Dear TI Team,

Is the above recognition correct?

Regards,

Y.Ottey

0 Dylan Hubbard over 5 years ago in reply to Y.Ottey

TI__Mastermind 46655 points

Hey Ottey,

Yes, Clemens assertion is correct, during that time you will only have leakage into the input buffer which be similar to the leakage of the OE input buffer.

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TXB0108: Input Current value