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TMUX1511: MAX Tpd and Tpd vs temperature

Part Number: TMUX1511
Other Parts Discussed in Thread: SN74CB3Q3125

Hi,

I would like to know what is the maximum propagation delay of TMUX1511? Similar devices such as SN74CB3Q3125 are specified in the datasheet as the maximum propagation delay 0.2ns@3.3V.

In addition, could you provide the test result for propagation delay vs temperature of TMUX1511?

Best Regards,

  • Hi Lector,

    We don't provided max propagation delay on the TMUX1511 because of a few reasons:

    1. Propagation delay is heavily influenced by loading conditions - while the loading conditions for the test are specified  - across temp loading conditions can change and its the loading conditions that dictate most of the propagation delay so a "max" prop delay for the chip is hard to pin down due to variation in load that may be hard to indicate in a datasheet- please see this FAQ on prop delay for a bit more information -  https://e2e.ti.com/support/switches-multiplexers-group/switches-multiplexers/f/switches-multiplexers-forum/1055554/faq-how-do-i-approximate-propagation-delay-and-channel-to-channel-skew-in-an-analog-switch-multiplexer

    2. The Reason why the older device does include it is because its not measured, its calculated. Most of our older parts we didn't run propagation delay tests  - they just approximated the value based on a perfect load (because they were slower parts anyway and generally propagation delay wasn't a huge factor on slower parts)  - (it is indicated in the notes section of the Tpd page of the older part). This part, the TMUX1511, had its propagation delay measured in lab.

    3. So we don't release the data versus temperature as the load is also varying at that point - with all that being said what does influence the propagation delay is how much the resistance increases over temperature (which there is data about in the datasheet) an inference can be made.

    Please check out the propagation delay FAQ to get an idea of how propagation delay will change over time with respect to system conditions and loading conditions.

    Please let me know if you have any other questions!

    Best,

    Parker Dodson