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SN74CBTLV3257: TINA-TI simulation

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Replies: 4

Views: 55

Part Number: SN74CBTLV3257

Hi,

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

Thank you. 

  • 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

  • In reply to Parker Dodson:

    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.   

  • In reply to An Thai1:

    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

  • In reply to Parker Dodson:

    Parker, 

    This is great. Thank you for your assistance.

    Regards.

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