Tool/software:
Hello,
I am experiencing an unexpected delay variation issue with the SN74LVC244A IC and would appreciate your support in diagnosing the potential causes.
Issue Description:
I am using the SN74LVC244A in two identical setups, referred to as Sample #A and Sample #B. The delay measurements of the outputs passing through the SN74LVC244A are as follows:
- Sample #A: 2.4 ns
- Sample #B: 3.4 ns
However, after swapping the SN74LVC244A ICs between Sample #A and #B, the delay measurements changed as follows:
- Sample #A: 2.8 ns
- Sample #B: 2.3 ns
Based on the swap, I initially expected that Sample #A would show a delay similar to the previous 3.4 ns value, and Sample #B would show a delay close to the previous 2.4 ns value. However, the results are significantly different, and I need to understand the potential reasons behind this unexpected behavior.
Question:
What factors could cause such variations in delay when swapping the SN74LVC244A between two identical setups? Are there specific parameters, IC characteristics, or environmental conditions that could lead to this kind of behavior?
Your insights would be greatly appreciated.
Thank you for your assistance.