SN75LVPE5421: Looking for a TMUX for the design of SGMII

Gary Chang

Intellectual 500 points

Part Number: SN75LVPE5421

Tool/software:

Hello TI team,

In our new version of eDIB, we need to use a TMUX for the design of SGMII (2.5G) and PCI-E Gen5.

Could we use the SN75LVPE5421, or do you have any recommended components for this application?

Diagram as below

Thanks

over 1 year ago

0 Nasser Mohammadi over 1 year ago

TI__Guru* 93570 points

Hi Gary,

Yes you can use SN75LVPE5421 for this application. Please note PCIe - unlike SGMII - requires RX detection. Therefor RX detect has to be disabled for the SGMII application. Please refer to the SN75LVPE5421 data sheet for details.

Regards, Nasser

0 Alan Chang over 1 year ago in reply to Nasser Mohammadi

TI__Intellectual 2350 points

Hi Nasser,

Is RX detection verified by pin RX_DET ( pin 42)? on table 6-4, RX_DET is decided by external resistor. so I have to switch the resisor to match PCI-E or SGMII, disable RX detection, right?

Any guideline to select MUX / DE-MUX?

0 Nasser Mohammadi over 1 year ago in reply to Alan Chang

TI__Guru* 93570 points

Hi Alan,

1). Yes your understanding is correct. You should use RX_DET pin to disable PCIe mode or force termination.

2). There is a SEL pin that allows you to select mux/demux.

Regards, Nasser

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SN75LVPE5421: Looking for a TMUX for the design of SGMII