Hi Jianjun,
The pin description is as follows:
1. MPXA6115AC6U (CASE 482A-01, Small Outline Package):
1 – N/C
2 – Vs
3 – GND
4 – Vout
5 – N/C
6 – N/C
7 – N/C
8 – N/C

2. MPX5100GP (CASE 867B-04, Unibody Package) and MPX5010DP (CASE 867C-05, Unibody Package):
1 – Vout
2 – GND
3 – Vs
4 – N/C
5 – N/C
6 – N/C

Let me know if you have any other questions.
Regards,
Tomas
PS: If my answer helps to solve your question, please mark it as "Correct" or “Helpful”. Thank you.