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Frequent questions

  • [FAQ] DS320PR810: How should PCIe redriver PD pins be configured?

    Part Number: DS320PR810 Tool/software: TI PCIe Gen 5/Gen 4 redrivers have powerdown (PD or PWDN) pins. How should I configure them, and why does TI suggest connecting them to inverted PERST# or PRSNT#?

  • [FAQ] SN65DPHY440SS: What is the design constraint for DPHY440 lane 0 when using in a MIPI CSI design?

    Part Number: SN65DPHY440SS Other Parts Discussed in Thread: SN75DPHY440SS Tool/software: I'm utilizing the SN75DPHY440SS in 4 lane configuration with default configuration parameters, sourced by a CSI-2 source. Lanes 1, 2, and 3 are correctly driven and…

  • [FAQ] TUSB1142: How to properly connect the TUSB1142 FLIP pin to the TPS2583xA-Q1 CC controller

    Part Number: TUSB1142 Other Parts Discussed in Thread: TPS25820 , Tool/software: The TUSB1142 design uses the Flip signal from a TPS25820 to switch the SuperSpeed signals from a USB Type C connector. We are not able to get SuperSpeed to work at all.

  • [FAQ] DS280DF810: Why is 25G/28G Retimer PRBS Generator Not Working?

    Part Number: DS280DF810 Other Parts Discussed in Thread: DS250DF410 Tool/software: Introduction: One common debug question when using TI's 25G/28G is why is the PRBS generator not working? This FAQ will review the key criteria for the retimer PRBS generator…

  • [FAQ] TUSB211A: Why does the USB 2.0 redriver not appear to work when taking eye-diagrams?

    Part Number: TUSB211A Tool/software: In order to perform eye-diagram testing, the TUSB211A and other USB 2.0 redrivers must first detect the scope termination after power on or reset. Once termination has been detected, then the redriver will enable the…

  • [FAQ] DS280DF810: Which 25/28G Retimer Should I Select?

    Part Number: DS280DF810 Other Parts Discussed in Thread: DS250DF210 , DS250DF230 , DS250DF410 , DS250DF810 , Tool/software: TI has several retimers in its 25/28G retimer product family. This FAQ breaks down some of the key differences between TI's 25…

  • [FAQ] DS280DF810: How can I calculate estimated signal conditioner power consumption?

    Part Number: DS280DF810 Tool/software: When implementing a signal conditioning device in a system, one design consideration is the device power consumption. In order to address this design consideration, it's valuable to understand how to calculate the…

  • [FAQ] TUSB522P: Where should a USB3 redriver be placed?

    Part Number: TUSB522P Tool/software: The USB3 redriver is meant to recover signal loss from a lossy channel. The redriver is best placed near the end of the channel. For example, in a motherboard application, the redriver is best placed closer to the…

  • [FAQ] TUSB8041A: Can USB hub be cascaded?

    Part Number: TUSB8041A Tool/software: Cascading USB hubs means to connect a root USB hub to the next tier which has another one or more hubs and few other devices and carrying forth in multiple tiers of hubs and devices . The USB standard specifies the…

  • [FAQ] LMH1297: SDI and Ethernet CDRs eye diagram capture

    Part Number: LMH1297 Tool/software: SDI and Ethernet retimers provide a feature to capture: 1). HEO/VEO indicating horizontal and vertical eye opening 2). Additionally one can capture post equalized eye diagram as well. Attached file discusses…

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