• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 16 subscribers
  • Views 742 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.

SN74CBTLV3257: TINA-TI simulation

An Thai1
Prodigy 100 points
Part Number: SN74CBTLV3257
Other Parts Discussed in Thread: TMUX1574, TINA-TI, , SN74AXC4T774

Hi,

Are there models of P/N SN74CBTLV3257 and TMUX1574 for TINA-TI simulation? I only found IBIS models for these devices. 

Thank you. 

  • 0
    TI__Guru 52462 points

    Hi An Thai1,

    Unfortunately we do not have TINA Models for these parts. We are currently in progress for a PSPICE model for the TMUX1574, but it is still in development.

    However, I can assist you in creating a simple model that can help capture either of these parts affect on the system design. Are there any concerns with these parts that I can help answer for you?

    Best Regards,

    Parker Dodson

  • 0 in reply to Parker Dodson
    Prodigy 100 points

    Hi Parker,

    Thank you for the quick response. 

    I need to check the signal integrity of a 2.5V, 30MHz JTAG clock, which goes through the SN74CBTLV3257 then a voltage translator SN74AXC4T774. I found a TINA model for the voltage translation in one of the forum threads. Can I model the switch as a 5ohm resistor and a capacitor? 

    Thank you.   

  • 0 in reply to An Thai1
    TI__Guru 52462 points

    Hi An Thai1,

    Yes you should be able to model the channel of switch as a simple RC circuit. I have attached a basic circuit that you can use. For example Ron, with a VCC of 3V and input of 2.4V would produce a typical Ron of 10 Ohms, where CIO(A port) ~ 10.5pF and the CIO(B Port) ~ 5.5pF. 

    Best Regards,

    Parker Dodson

  • 0 in reply to Parker Dodson
    Prodigy 100 points

    Parker, 

    This is great. Thank you for your assistance.

    Regards.