SN74AXCH8T245: Can you tie multiple inputs/outputs together to increase current drive?

Zach Kimble

Intellectual 1940 points

Part Number: SN74AXCH8T245

Tool/software:

Hello,

Can I connect several outputs of SN74AXCH8T245 together if I also connect the corresponding inputs together? I am hoping to get more drive strength than 12mA. I cannot use the equivalent LXCH device because one of my voltage rails is below 1.1V.

Thank you!

Best regards,

Zach Kimble

1 month ago

0 Joshua Salinas 1 month ago

TI__Mastermind 21720 points

Hello Zach,

This should be fine. We normally don't recommend connecting outputs together because of bus contention.

However, you reduce the likelihood of bus contention by connecting the corresponding input together.

More information can be found here: [FAQ] Can I connect two outputs from a CMOS logic device together directly?

Regards,

Josh

0 Zach Kimble 1 month ago in reply to Joshua Salinas

TI__Intellectual 1940 points

Hi Josh,

Thank you for confirming. When you say that we reduce the likelihood of bus contention, do you mean it's still possible that we could see bus contention even if the two corresponding inputs are directly connected together?

Best regards,

Zach Kimble

+1 Joshua Salinas 1 month ago in reply to Zach Kimble

TI__Mastermind 21720 points

Hello Zach,

No, we wouldn't see bus contention if inputs are directly connected together. Sorry for the confusion.

Regards,

Josh

0 Zach Kimble 1 month ago in reply to Joshua Salinas

TI__Intellectual 1940 points

Thank you Josh!

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SN74AXCH8T245: Can you tie multiple inputs/outputs together to increase current drive?