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ISO1540-Q1: SMBus and I2C Application

Part Number: ISO1540-Q1

Hello Support team:

I met SMBus programming issue cause by noise or longer communication line.

Project diagram as below;

1. The host system(MCU) SMBus + ISO1540Q1/ISO1541Q1 + the programming MCU (SMBus). Is it good solution for avoid noisy? 

2. The host system(MCU) SMBus +TCA9517A (level shift)+ ISO1540Q1/ISO1541Q1 + the programming MCU (SMBus). 

Which solution is good?

I think the item 1 is good?  item 2 TCA9517A not good?