• State Resolved
  • Replies 4 replies
  • Subscribers 33 subscribers
  • Views 119 views
  • Users 0 members are here
Support feedback
Options
Options
Related

DS250DF410: DS250DF410 design check

Jenny Chen
Expert 4330 points
Part Number: DS250DF410


Hi expert,

May I have your help on below question?

  1. Do you have any design guides, reference schematics/layouts, or layout guides that you can provide?

2. According to the datasheet, the external EEPROM I²C address must be set to 0xA0. If the address is set to a different value, will the retimer still function correctly?

3. Please help confirm whether this is correct:
MAX Power consumption = 2.5 V × 665 mA = 1.663 W

4. Please provide the thermal model for simulation.

 

Thanks a lot!

Jenny

  • 0
    TI__Expert 6020 points

    Hi Jenny,

    1. On the device's product page you can follow the "Request now" link to access DS250DF410EVM schematic and layout files. The programming guide for the device can be found here as well. 

    2. Yes, when using an external EEPROM to configure the system, the EEPROM device address byte must be 0xA0 to ensure proper function. 

    3. For the total device power consumption:

     525mW (Max total idle power consumption) + 4 × 430mW (Max power consumption per active channel*) =  2.245W

    *Note, for this calculation I used the power consumption per channel assuming CDR acquiring lock with CTLE, full DFE, Tx FIR, Driver, and Crosspoint enabled. This will be different for other device states, as defined in Section 7.5 of the DS250DF410 data sheet.

    4. The thermal model for this device has to be requested internally, so please allow a few days for me to complete this process.

    Best regards,

    Greg

  • +1 in reply to Gregory Kobyakov
    TI__Expert 6020 points

    Hi Jenny,

    I just sent you a private message on E2E with thermal model resources.

    Best regards,

    Greg

  • +1 in reply to Gregory Kobyakov
    TI__Expert 4330 points

    Hi Greg,

    Thanks for your report.

    I have some questions I'd like to confirm with you, as follows: I'm currently using a 1024-byte EEPROM IC, Blocks 0-3 (0xA0, 0xA2, 0xA4, 0xA6).

     

    1. You mentioned earlier that the EEPROM device address must be 0xA0, is that the base address?

     

    1. The Retimer needs to have a >256-byte enable bit to read later blocks.

     

    1. To determine the EEPROM capacity, I need to check the size of the HEX.file, is that correct?

     

     

    BR,

    Jenny

  • +1 in reply to Jenny Chen
    TI__Expert 6020 points

    Hi Jenny,

    1. Yes, this is the base address the hardware is programmed to read from

    2. Yes, that is correct. If the device is not configured for EEPROM > 256 Bytes, it will not be able to load later memory locations from the EEPROM

    3. Could you please clarify here? You can determine the size of the EEPROM hex file according to the number of bytes in it. However, EEPROM capacity is determined by the EEPROM chip being used. For example, the DS250DF410 has a maximum EEPROM size is 2048 Bytes

    Best regards,

    Greg