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HD3SS3412A: Best candidate of TI PCI-Express gen2 switch or bridge IC with AM6546 processor

Part Number: HD3SS3412A
Other Parts Discussed in Thread: AM6546, , HD3SS3411

Our customer would like to connect AM6546 processor  to multiple PCI-Express gen2.
.They recognize that a switch or bridge IC is required when connecting PCIe to multiple components.
Each component may be a separate board, such as a PCI slot extension on a PC motherboard.

 It seems HD3SS3412A is one of candidate.  
 However the variety about PCI related device is abundant in TI WEB and there are some old parts.

Could you give us best candidate to meet following their system requirement ?

 Number of components to be connected: Under consideration
Assumptions: 1: 2, 1: 3, 1: 4
 Number of lanes: 1 or 2
Industrial grade since application is high end PLC