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DS25BR440: LVDS BUFFER / REPEATER ICs

Pooja Mishra
Prodigy 45 points
Part Number: DS25BR440
Other Parts Discussed in Thread: DS280MB810, SN65LVCP408

Tool/software:

Dear Ti Team,

I'm looking for a  LVDS BUFFER / REPEATER IC

4-data pairs and 1-clock pair.

Parameters:

5-Channel input and 5-channel output,

Data transfer rate : 1.6 Gbps to 2.5Gbps

Power supply : 2.5V To 3.3V

And

I can use 2 4-channel ICs but the part to part skew rate required is 10ps.

Kindly suggest some ICs and options.

Regards,

Pooja Mishra

  • 0
    TI__Mastermind 23707 points

    Hi Pooja,

    In your requirement for 10 ps part to park skew, I'm also wondering if this implies a 10 ps channel to channel skew requirement?

    If so, I believe this is a very challenging requirement to meet.  For several of our LVDS parts, the best channel to channel skew I saw was 25 ps typical, 75 ps max.

    Even our high performance redrivers would find this to be a challenging requirement.  DS280MB810 is a redriver supporting up to 28 Gbps, and has channel to channel skew of typically <17 ps.

    Can you please help clarify your requirements?

    Thanks,

    Drew

  • 0 in reply to Drew Miller1
    Prodigy 45 points

    Hi Drew,

    Thank you for your reply.

    It is not channel to channel skew, If I'm using 2 similar ICs then there part to part skew must be less than or equal to 10ps.

    Primarly I'm using a Cam-link Interface in it base configuration, and that Base Configuration I need to convert into TTL level.

    tha camlink interface is on another module, i'm using this pcb as a extender pcb which brings camlink and ttl on a single pcb.

    As there will be some losses while transferring the data i need a buffer/ repeater.

    As the Camlink has 4-DATA LANE 1- CLOCK (LVDS) I NEED A buffer/ repeater IC which support minimum 5- channels.

  • 0 in reply to Pooja Mishra
    Guru 279750 points

    Where does the 10 ps requirement come from?

  • 0 in reply to Pooja Mishra
    TI__Mastermind 23707 points

    Hi Pooja,

    Like Clemens asked, I think it would be helpful to understand where the 10 ps requirement is coming from.  By establishing this requirement of part to part skew of 10 ps, it seems like you're interested in ensuring that all 5 channels are within 10 ps skew.  Can you please help add some details on this?  Do you have a channel to channel skew requirement?

    One option might be the SN65LVCP408.  This is an 8x8 crosspoint switch, so this would support buffering all 5 channels within the same device.

    Thanks,

    Drew