TXS0206: Independent control of VCCA and VCCB

Dan Lowe

Part Number: TXS0206

I plan to use the TXS0206 to interface a 1.8V microprocessor with a 2.7V microSD card. I would like to be able to switch off the 2.7V rail whilst leaving the 1.8V rail on i.e. set VCCB to 0V and leave VCCA at 1.8V.

Is this an acceptable mode for the level translator to be in? Will there be any leakage current between the 'A' and 'B' sides of the chip if I put it into a high impedance state before setting VCCB to 0V?

Thanks in advance for any help.

Dan

over 8 years ago

0 Nicholas Mariani9 over 8 years ago

TI__Intellectual 2100 points

Hey Dan,

This should be fine for the chip. The only requirement that I am aware of for power up is that Vcca should be powered before turning on Vccb. It sounds like you will be taking the proper safety steps by enabling high-z on this chip, something most don't do... Given how you wish to turn supplies off you should be good to go. If you find that you have a problem with it let me know.

If this answered your question please hit the green "Verify Answer" button below.

Best Regards,
Nick

0 Dan Lowe over 8 years ago in reply to Nicholas Mariani9

Prodigy 20 points

Thanks Nick, that's really helped.

Logic

Logic forum

TXS0206: Independent control of VCCA and VCCB