SN74LVC8T245: Is there any internal pull up resistor on the outputs?

Stralows

Part Number: SN74LVC8T245
Other Parts Discussed in Thread: SN74AXC8T245

Hello,

We want to drive a device that has an internal pull down resistor of 4.7k and we are concerned if the SN74LVC8T245 could have any internal pullup resistor that could create a voltage divider so low that could not pass the device threshold

For instance , from the datasheet, we know that the TXS0108EPWR has an internal pullup resistor of 4k that puts our voltage output at 2.7V

Does this device have a similar pullup resistor?

Thank you in advance

Regards

over 6 years ago

0 Karan Kotadia over 6 years ago

TI__Genius 16735 points

Hi,

The SN74LVC8T245 does not have internal pullups. The TXS devices have weak output drivers so they have internal pullups to improve rise and fall times. Since the LVC devices are not auto-bidirectional, they can have strong output drivers.

I will also recommend using the SN74AXC8T245 if you are not using the full supply range of 5V.

Thanks!

-Karan

0 Stralows over 6 years ago in reply to Karan Kotadia

Prodigy 50 points

Hello Karan,

Thank you very much for the help and suggestion.

Regards

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SN74LVC8T245: Is there any internal pull up resistor on the outputs?