TXS0108E: Facing Issue while using bidirectional LED

Junehar Kevin J

Prodigy 90 points

Part Number: TXS0108E
Other Parts Discussed in Thread: SN74LXC8T245, TXU0104

Tool/software:

Hi Team,

We are using the below attached circuit for driving our Bidirectional LED.

But the LED intensity is very low.

Looks like some drive issue.

Please suggest some debug procedures to rectify this issue.

Thanks

Kevin

8 months ago

0 Clemens Ladisch 8 months ago

Guru 317480 points

The TXS is a passive switch with open-drain outputs; the high level is generated only by the pull-up resistors.

Use the SN74LXC8T245 or 2× TXU0104.

0 Junehar Kevin J 8 months ago in reply to Clemens Ladisch

Prodigy 90 points

Hi Clemens,

Thanks for the input.

can you share the output ping source and sink current details.

Thanks

Kevin

0 Clemens Ladisch 8 months ago in reply to Junehar Kevin J

Guru 317480 points

With a 3.3 V supply, LXC outputs have a drive strength of 24 mA; TXU, 10 mA.

0 Jack Guan 8 months ago in reply to Clemens Ladisch

TI__Mastermind 41266 points

Hi Junehar,

For future reference, the specs are you looking for is located in the Electrical Ch. section under your application's VCCA/ VCCB need and IOH/ IOL test conditions column. Please let us know if any additional questions.

Regards,

Jack

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TXS0108E: Facing Issue while using bidirectional LED