I am currently using the PCA85063A in a design I am working on. I saw that this part was not recommended for new design, and I'm considering the PCA85073A as a replacement. However, I have examined both datasheets and I'm having difficultly determining how these two devices are different. Their electrical characteristics look identical, their listed features look the same, and the package and temperature range is the same. Can anyone tell me what the key differences are between these two parts?