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SN74AUC2G66: What is terminator type in IBIS model?

Ella KIM
Expert 4162 points
Part Number: SN74AUC2G66

Hello,

For SN74AUC2G66 IBIS model, I can see there're two different model_type - one is Terminator and the other is Series_switch.

(1) Two types are showing different values for all variables. May I know why there're two types and what the applicational difference between two types?

(2) Can customer change "terminator" type into I/O type? Customer uses SN74AUC2G66  as a general I/O.

Thanks!

-Ella

  • 0
    Guru 305770 points

    There are three types in the IBIS model. The C pins are digital, high-impedance CMOS inputs; the A/B pins are analog, unbuffered switch I/Os. There IO_xxx and IO_xxx_S models are for switch I/Os with the switch open and closed.

  • +1 in reply to Clemens Ladisch
    TI__Genius 10552 points

    Hi Ella,

    The model "Series Switch" with an "_s" is for modeling I/O's - the source to drain path. The model Terminator without an "_s" is a terminator model and is used to represent the IV curve through the ESD cell.

    Why are you looking to change the terminator model to I/O? 

    Thanks!

    Alex