LSF0108: LSF0108 layout placement ?

Part Number: LSF0108

Tool/software:

Hi Ti pals,

We use LSF0108 for SPI signals level translator from 3.3V to 1.8V. 

Topology is shown below:

FPGA SPI (3.3V) on A board  -> board to board connector (BTB CONN) -> LSF0108 on B board -> SPI Flash (1.8V) on B board.

The routing length is about 11 inch between  BTB CONN and SPI flash.

We wolud like to know the LSF0108 need to be placed close to BTB CONN or SPI flash side when layout placement?   

Thanks,

Jimmy Huang