• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 21 subscribers
  • Views 403 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

SN74AXC8T245: What is the output high-Z impedance ? What is the drive strength of these outputs?

SN74AXC8T245: Input impedance

Carlo
Expert 7715 points

Part Number: SN74AXC8T245

Hi team,


Good day.

What is the input impedance of SN74AXC8T245? Is there any range of values or how to compute this?


Regards,
Carlo

  • 0
    TI__Guru* 97676 points

    Hi Carlo,

    It depends on what you're trying to accomplish. If you're looking to simulate signal integrity, I would recommend using the provided IBIS models, which include package parasitics as well as characteristics of the device.

    If you're just looking for input characteristics, you can find those in the electrical characteristics table. The input leakage is listed as up to 1uA at 3.6V, so a minimum of 3.6/1e-6 = 3.6 Mohm resistance. It also lists the typical input capacitance of 4.5 pF. These two together should give you a reasonable representation of the input for most applications.