TXS0102: Output Enable

SSC

Part Number: TXS0102

For the TXS102, the datasheet says, "The output-enable (OE) input circuit is designed so that it is supplied by VCCA." If my VCCA = 2.5V and VCCB = 3.3V, is it OK to tie OE pin to VCCB?

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 316640 points

Yes. See [FAQ] Can the input voltage (Vi) to my logic device be higher than the supply voltage (Vcc)?

0 Jack Guan over 1 year ago

TI__Mastermind 40046 points

Hey SSC,

Please note that in doing so, the logic of the OE pin is still referenced to that of VCCA:

Regards,

Jack

0 SSC over 1 year ago in reply to Clemens Ladisch

Prodigy 115 points

Clemens, thanks for your feedback. The datasheet recommended operating table does have this:

Notice, the OE input shows a max of 5.5V which corresponds to the VCCB voltage. While I don't like making assumptions, I think the inference can be made that it is OK to tie OE to the VCCB rail.

0 Jack Guan over 1 year ago in reply to SSC

TI__Mastermind 40046 points

Hey SSC,

That is correct, the OE pin of this device can be tied to VCCB since it is overvoltage- tolerant (explained further in the FAQ that Clemens' has referenced), but the logic of the OE pin is still referenced to the voltage levels of VCCA.

Regards,

Jack

0 Clemens Ladisch over 1 year ago in reply to SSC

Guru 316640 points

For the OE pin, 5.5 V does not correspond to VCCB; OE can be tied to 5.5 V even when VCCB has a lower voltage.

OE can be tied to VCCA, or VCCB, or anything up to 5.5 V.

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TXS0102: Output Enable