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CDCLVD1212: The minimum propagation delay tPD

Part Number: CDCLVD1212

The minimum propagation delay is missing on the datasheet. It is certainly not zero. What is the minimum value from your characterization?

Thank you!

  • Hi Andrew,

                      You are correct, the minimum propagation delay is not given on the datasheet. Unfortunately i don't have access to the characterization data since this part is very old. Let me find out with my team and i will get back to you.

  • Hi Badarish,

    Any chance that you have an update of the characterization data?

    Thanks,

    Andrew

  • Hi Andrew,

                      My apologies for the long wait. I have requested access to this file server and am waiting on it. I will get back to you as soon as i have access to the data. 

  • Hi Andrew,

                     Sorry for the late response. I was able to access some characterization data. The minimum prop delay is ~ 1.3 ns.

    Note that the data has measurements only for "nominal" corner lot material for Voltage variation (2.375 V, 2.5 V, 2.625 V) and temperature variation (-40 C, 25 C, 85 C). 

  • Hi Badarish,

    Thanks. In the datasheet, Tpd has both TYP and MAX specifications, are they applicable for both fast and slow corners in general?

    To understand the variation of MIN Tpd, what are the measurements of TYP and MAX for fast and lower corners?

    Thanks,

    Andrew

  • Hi Andrew,

                     The datasheet specification of typical applies to the "nominal" corner lot material tested at room temperature and nominal VDD. The min and max specifications encompass the variations in process, voltage and temperature. 

    As i previously mentioned, the characterization data which was available didn't have the strong and weak corner information, it only had nominal.

    There is some information on the minimum prop delay from simulations and that value is ~ 850 ps at strong corner, -40 C and 2.625 V. My expectation is that silicon would be worse than simulations and it would definitely be lower than the 1.3 ns i mentioned in the last reply as this is at nominal corner. 

    Based on the simulation data and its correlation with lab data at typical corner, i would say that 1.1 ns is a good estimate for the minimum propagation delay which would be at strong corner, -40 C and 2.625 V.