LSF0102: Low Level DC Offset

Jim CHEN

Part Number: LSF0102
Other Parts Discussed in Thread: SN74AXCH2T45, SN74AXC2T45

Dear Team,

I learn from another E2E question that there is a DC offset when logic low. And we can increase pullup resistor value to improve this offset.

https://e2e.ti.com/support/logic/f/151/t/889635?tisearch=e2e-sitesearch&keymatch=LSF0102

But my customer would like to know if TI has another level-shift solution that has no offset when logic low.

Do you have any suggestion?

Thank you.

Regards,

Jim

over 5 years ago

0 Dylan Hubbard over 5 years ago

TI__Mastermind 46555 points

Hi Jim,

Here is a list of translators that should be better for this: http://www.ti.com/logic-circuit/voltage-level-translation/direction-controlled-voltage-translation/products.html.

0 Jim CHEN over 5 years ago in reply to Dylan Hubbard

TI__Expert 4795 points

Hi Dylan,

From your list, I would like to propose SN74AXC2T45 and SN74AXCH2T45 to my customer.

Could you help to confirm these two solution has no offset when logic level low?

Thank you.

Regards,

Jim

0 Dylan Hubbard over 5 years ago in reply to Jim CHEN

TI__Mastermind 46555 points

Hi Jim,

The SN74AXC2T45 is a good selection. Low level offset is indicated in the data sheet with Vol. If you are just driving another high impedance digital input, then the low level voltage will be GND.

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LSF0102: Low Level DC Offset