TXB0101: TXB0101 Pull up Resistor

Kami Huang60

Part Number: TXB0101
Other Parts Discussed in Thread: TXS0101

Dear Sir/Ms.

My customer connector 2 voltage level at TXB0101 both side. VCCA connect to 1.8V and VCCB connect to 3.3V. A pin connect to an open drain I/O pin + pull high resistor and pull high to 1.8V. B pin connect to a 3.3V Push-pull I/O pin. Should I add a pull high resistor at pin B?

over 6 years ago

0 Emrys Maier over 6 years ago

TI__Guru* 96591 points

Hi Kami,
It's a little hard to decipher your text into a schematic -- could you draw that for us?

0 ShreyasRao over 6 years ago

TI__Guru 56100 points

Kami Huang ,

Since it an open drain interface, TXS0101 is ideal for the application.
You do not need a pullup resistor since TXS has an internal 10k resistor for OD interface.

0 Kami Huang60 over 6 years ago in reply to ShreyasRao

Genius 3830 points

In A side is open drain but in B side is push-pull.

0 ShreyasRao over 6 years ago in reply to Kami Huang60

TI__Guru 56100 points

I would suggest switching over to TXS0101.
It works for both OD and push pull interface without the need for pullup resistor.

0 Kami Huang60 over 6 years ago in reply to ShreyasRao

Genius 3830 points

Hello Shreyas,
Thank you. I got it.

0 ShreyasRao over 6 years ago in reply to Kami Huang60

TI__Guru 56100 points

Thank you, Kami.
If you have anything else, please let us know.

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TXB0101: TXB0101 Pull up Resistor