LSF0108: Ioff Or Partial Power Down Features?

IDK

Part Number: LSF0108

Tool/software:

Hi,

What is the expected operation for the LSF0108 and other LSF translators if VREF_A is off (0V) and VREF_B & the EN pin are both at 3.3V? Would the B-side I/O be pulled down to GND, would the I/O be high impedance, or would there be some sort of other behavior that is dependent on the state of the I/O?

Thanks,
Matthew

6 months ago

+1 Jack Guan 6 months ago

TI__Mastermind 40136 points

Hi Matthew,

The I/Os can still be influenced during this state, as VREFB and EN are shorted high and the device is still enabled. To properly disable the device and place the I/Os in High-Z, an open drain driver driving the EN pin low would be sufficient. Here is an example of this setup: www.ti.com/.../5614304068001

Regards,

Jack

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LSF0108: Ioff Or Partial Power Down Features?