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TMUX4051: Graphs of leakage current vs. tempersature and charge injection vs. source voltage

Part Number: TMUX4051
Other Parts Discussed in Thread: MUX508, CD4051B, , TMUX1108

The (preliminary) datasheet so far doesn't give any plots of Ion or Ioff leakage currents vs. temperature and charge injection versus source voltage for comparisons to other alternative parts like MUX508 or DG4051.

Could you please provide them ?

  • Hi Mirko,

    The plots are planned to be added in to the datasheet at full release. What are your leakage current and charge injection requirements?


  • Hi Tyler,

    as I understand it correctly, the worst case leakage currents published in the TMUX405x datasheet are similarily chosen to at least reach/best their classic counterparts (CD4051B or SN74HC4051 etc.) to be a drop in replacement (with a 1.8V logic advantage). Also the limits of these classic parts are/were dictated by measurement limits in production at the time of their introduction (decades ago), isn't it ?

    So since the TMUX4051 is fabricated certainly in a much better process than those old parts (originally produced, when the datasheets were first written, 1970ies/80ies), I would expect that TYPICAL leakage perfromance is not worse than that of a modern high voltage precision analog switch like the MUX508, correct ?

    I need leakage currents of less than 10nA at temperatures up to 60°C, or better than 1nA to be absolutely on the safe side, if some ageing/stress effects may come into play.

    My investigations show, that even the old CD4051B, HC4051 and other more expensive contenders like the Vishay DG4051 etc. easily reach that performance, but some are unfortunately not specified/tested as such or much more expensive.

    If  I were TI, I would specify/test the TMUX405x more aggressively in that regard to bring it close to the precision switch region, even if the yield goes down a little bit and (test) cost may go up a few cents. The market would certainly appreciate such a low budget precision switch product for cost sensitive applications (At least I do, I'm looking for a cost effective minaturized 8:1 MUX for quite a while).

    Charge injection is not overly important for my application, but it would be nice to know, at which voltage the 0pC crossover point is, if it is a complementary switch.

    Thank you,


  • Hi Mirko,

    Since the TMUX4051 is not fully released yet, the min and max limits may shift but will likely remain close to the values given in the current, pre-production datasheet. It appears that the typical value would work for your application, but that value will likely vary across manufacturing lots and temperature so it is not guaranteed to meet your requirement. To guarantee the 10nA performance at 60°C, you would have to use the MUX508 or the TMUX1108 depending on your voltage requirements. The TMUX1108 is offered in the small footprint RSV package.