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Frequent questions

  • [FAQ] DP83TC812S-Q1: Why is DP83Txxxx not passing compliance?

    Part Number: DP83TC812S-Q1 Other Parts Discussed in Thread: DP83TC811 Tool/software: For all 1000Base-T1 and 100Base-T1 compliance tests (including Interopability/link-up, PMA, PHY Control, PCS, and EMC), there is a required software configuration to…

  • [FAQ] DP83848Q-Q1: How to Disable 25Mhz CLKOUT Output

    Part Number: DP83848Q-Q1 Tool/software: If the CLKOUT output is not used on DP83848, it may be disabled using the below register writes. This may be beneficial for EMC emissions testing, in order to minimize the energy of 25Mhz harmonics. 0x13[0] =…

  • [FAQ] DP83867E: What IPG intervals can this PHY support?

    Part Number: DP83867E Tool/software: DP83867 supports the expected 12 byte IPG at the MDI as well as lower amounts in some conditions. This number comes from IEEE802.3 section 4.4.2 which sets out that the minimum IPG for a transmitted frame is 12 bytes…

  • [FAQ] XIO2001: MicroStar BGA Discontinuation and New nFBGA Package Designators

    Part Number: XIO2001 Tool/software: Devices in the MicroStar Jr. BGA packaging were discontinued and redesigned using a laminate nFBGA package in 2020. This nFBGA package offers datasheet-equivalent electrical performance. It is also footprint equivalent…

  • [FAQ] DP83867IR: Where are RX_ER and COL in DP83867IR/CR PAP?

    Part Number: DP83867IR Tool/software: RX_ER and COL in SNLS484G should be in pins 54 and 55, respectively. In this document, there is a typo where these pin numbers are omitted.

  • [FAQ] TUSB2E221: How do I update my PCB design from using the TUSB2E22 to the TUSB2E221?

    Part Number: TUSB2E221 Other Parts Discussed in Thread: TUSB2E22 Tool/software: The TUSB2E221 is the latest 2-port eUSB2 repeater. Released in 2024, it contains updates that allow it to conform to the latest eUSB2 v1.2 specification as well as adding…

  • [FAQ] LMH1297: EOM - Eye Opening Monitor - How to Re-Construct Eye Diagram

    Part Number: LMH1297 Tool/software: CDR based devices stream out raw hit counts by sweeping voltage DAC and phase DAC to sample incoming signalin both voltage and time domain. Using this raw data, eye diagram can be re-constructed. Attached file explains…

  • [FAQ] DS80PCI102: PCIe RX Detect Pulse Timing

    Part Number: DS80PCI102 Tool/software: In PCIe applications, transmitter - while it is in high impedance - sends out pulses until it realizes a change in RC time constant of the response. For further details note This FAQ . For further details, note…

  • [FAQ] DS90UB971-Q1: How can I optimize my FPD-Link camera design for system level ESD immunity?

    Part Number: DS90UB971-Q1 Other Parts Discussed in Thread: DS90UB960-Q1 , DS90UB953-Q1 Tool/software: How can I optimize my FPD-Link ADAS design to achieve better performance in system level ESD immunity testing? When striking my system with ESD pulses…

  • [FAQ] DS280DF810: The new set of DS2x0DFx10 devices Version IDs do not match the Version IDs of previous set (Register 0xF0)

    Part Number: DS280DF810 Tool/software: In TI's DS2x0DFx10 Ethernet retimer devices, there is a Version ID register that can be used to read back the device version. For groups implementing this device, we frequently see them checking this Version ID to…

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