TS3A5223: level sifter combine solution

Bonnie Chen

Intellectual 1120 points

Part Number: TS3A5223

Hi team,

my customer need SPDT 2:1 solution, but 1 input is 1.8V and another is 3.3V.

do we have single chip solution to do?

over 5 years ago

0 Adam Torma over 5 years ago

TI__Mastermind 45350 points

Bonnie,

These signals switches are bidirectional passive FET switches and will pass any voltage from one side of the switch to the other with out issue. If you set Vcc to the highest voltage you need to pass you can place 3.3V on one input and 1.8V on another input. The TS3A5223 will handle this without issue.

Thank you,

Adam

0 Bonnie Chen over 5 years ago in reply to Adam Torma

TI__Intellectual 1120 points

I have questions about COM1,COM2 voltage level and frequency support.
The com1,com2 are 3.3V level, right? Does it depend on VCC?

0 Adam Torma over 5 years ago in reply to Bonnie Chen

TI__Mastermind 45350 points

Bonnie,

The voltage level on the COM pin depends on what is driven to the NC or NO pins and which signal path is selected. The TS3A5223 doesn't source or sink any current by itself. You can think of the TS3A5223 ideally as a wire.

Thank you,

Adam

0 Bonnie Chen over 5 years ago in reply to Adam Torma

TI__Intellectual 1120 points

Hi Team,

We need the component to support NC pin 3.3v/1.8v input and COM pin output 3.3v, so the level shift function is for the NC pin not SEL pin.

Could you help to provide other chip to meet the request?

0 Adam Torma over 5 years ago in reply to Bonnie Chen

TI__Mastermind 45350 points

Bonnie,

Can you show a block diagram of what you are looking for? What type of signals are you passing?

Using the TS3A5223, if you place 3.3 V on the NC pin, there will be 3.3V on the COM pin. If you place 1.8V on the NC pin there will be 1.8V on the COM pin.

If you need to have 3.3V on the NC pin and 1.8V on the COM pin you will need to use a level shifter and not a signal switch. You may post a request for a level shifter in the logic forum.

Thank you,
Adam

0 Bonnie Chen over 5 years ago in reply to Adam Torma

TI__Intellectual 1120 points

Hi Adam,

so back to my question, so we don't have signal switch conbine with level shifter function, right?

0 Adam Torma over 5 years ago in reply to Bonnie Chen

TI__Mastermind 45350 points

Bonnie,

I'm not aware of a signal IC solution that will provide 2:1 function and level shift form 3.3 V to 1.8V.

Thank you,
Adam

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TS3A5223: level sifter combine solution