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DS160PR410: adapter card (x4, x8, x16)

GARETH OU
Guru 10195 points
Part Number: DS160PR410
Other Parts Discussed in Thread: DS320PR410, SN75LVPE5412, SN75LVPE5421, DS320PR810, SN75LVPE4410, HD3SS3412, DS320PR822, DS320PR412-421EVM, DS320PR410-RSC-EVM

Tool/software:

Hi

Could you help check the block diagram of the following adapter card (x4, x8, x16). Any need to adjust or other better combinations to recommend?

  • 0
    TI__Mastermind 21240 points

    Hi Gareth,

    PCIe x4 Gen4: DS320PR410 may be a better choice here because this redriver has better linearity than DS160PR410. DS160PR410 will also support Gen4 x4 use case.

    PCIe Gen5 mux/demux: I'm a bit confused about the number of lanes here. Is it 8 lanes at the MB which can transmit to/receive from PCIe x8 slot or PCIe 0x16 slot? If that's the case, the best option is to use 2 units SN75LVPE5412 in the MB --> adapter card direction and 2 units SN75LVPE5421 in the adapter card --> MB direction.

    PCIe x8 Gen5/Gen4: 4 units DS320PR410 may be the best choice here. PR410 will have less crosstalk than PR810 because less channels are routed through the chip. Both DS320PR410 and DS320PR810 will support this use case.

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    Guru 10195 points

    Hi Lucas

    Thanks for your comment

    PCIe x4 Gen4: Can it be changed to SN75LVPE4410? The customer has used it in previous projects

    PCIe Gen5 mux/demux: So different item need to be used in TX and RX, right? This series doesn't have two-way communication like the HD3SS3412, does it?

  • 0 in reply to GARETH OU
    TI__Mastermind 21240 points

    Hi Gareth,

    Yes, SN75LVPE4410 can be used for PCIe x4 Gen4. Note that it is pin-to-pin compatible with DS160PR410 and has more limited functionality. Specifically, it has a smaller temperature range and does not support I2C master mode (external EEPROM programming). Please see attached presentation.

    8228.TI_PCIE_Gen4_Redrivers_Comparison.pdf

    Yes that's correct, different PNs need to be used for mux and demux. We do not have any bidirectional redriver + mux/demux for PCIe Gen5. SN75LVPE5412 is a 4-channel redriver with 1:2 demux and SN75LVPE5421 is a 4-channel redriver with 2:1 mux.

    Alternatively, the customer can use 4 units DS320PR822. This is an 8-channel redriver with integrated 2x2 crosspoints which can be configured as mux or demux.

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    Guru 10195 points

    Hi Lucas

    Thanks for the reply!

    Could you help provide the reference schematic DSN file? SN75LVPE5421/412

  • 0 in reply to GARETH OU
    TI__Mastermind 21240 points

    Hi Gareth,

    Please click request now on the product site. After approval, you will have access to design resources including schematics, IBIS-AMI, and programming guides for all PCIe Gen5 redrivers. The DSN file is in the folder titled DS320PR412-421EVM_DSN.zip.

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    Guru 10195 points

    Hi Lucas

    Could you please provide the DS320PR810/410 reference schematic as well?

  • 0 in reply to GARETH OU
    TI__Mastermind 21240 points

    Hi Gareth,

    DS320PR810 and DS320PR410 EVM schematic files are also included in the Gen5 redrivers secure folder.

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    Guru 10195 points

    Hi Lucas

    Could you help check the below ds320pr412/21 schematic and any need to adjust

    ds320pr412.pdf

    Also, does PI3EQX32904 recommend DS320PR410 or DS320PR810?

    Is there a DSN file? DS320PR810 and DS320PR410

  • 0 in reply to GARETH OU
    TI__Mastermind 21240 points

    Hi Gareth,

    Allow me to review the schematic and provide feedback by the end of this week, US time.

    I see that PI3EQX32904 is a 4-channel redriver, so this will most closely match DS320PR410. However these redrivers are not pin compatible.

    We do not have DSN files for DS320PR810 and DS320PR410. There are Altium design files available in the secure folder for DS320PR410-RSC-EVM and DS320PR810-RSC-EVM.

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    Guru 10195 points

    Hi Lucas

    Thank you for your great help

    Also, I would like to ask what is the difference between DS320PR410 and DS320PR412?

  • 0 in reply to GARETH OU
    TI__Mastermind 21240 points

    Hi Gareth,

    DS320PR410 is a 4-channel linear redriver intended for PCIe Gen5 which supports up to 32 Gbps and does not include mux, demux or crosspoint.

    DS320PR412 is an old part number for SN75LVPE5412 which was used before product release. If you see any reference to DS320PR412 and DS320PR421, these are equivalent to SN75LVPE5412 and SN75LVPE5421.

    SN75LVPE5412 is a 4-channel linear redriver with 1:2 demux intended for PCIe Gen5.

    SN75LVPE5421 is a 4-channel linear redriver with 2:1 mux intended for PCIe Gen5.

    Best,

    Lucas

  • 0 in reply to Lucas Wolter
    TI__Mastermind 21240 points

    Hi Gareth,

    Here is my feedback on the schematic. Note that I only reviewed networks directly connected to U36, U37, U38, and U39. The customer is still responsible for ensuring their design will operate as intended.

    SN75LVPE5412-21_Schem_Review.pdf

    Here is the slide I referenced in the PD pin section.

    Best,

    Lucas