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Frequent questions

  • [FAQ] LMH1239: SDI Layout Suggestions

    Part Number: LMH1239 Other Parts Discussed in Thread: LMH1297 Tool/software: Hello SDI engineers and LMH enthusiasts, Figure 1 - 3:5 for SDI In this E2E FAQ, I will be discussing GND plane layout best practices for SDI designs. In cable driver…

  • [FAQ] TDP142: Linearity Range Description

    Part Number: TDP142 Other Parts Discussed in Thread: TDP2004 , , TDP1204 Tool/software: Hi Experts, What does 'Linear range' refer to on re-drivers like TDP142, TDP1204, TDP2004,...?

  • [FAQ] Device Mismarked with A5

    The device I received is marked as 'A5' but that is not listed as an option in the datasheet.

  • [FAQ] PC -> EVM 983 -> Display with 988 -> Display with 988 -> Display with 988

    Part Number: DS90UB988-Q1EVM Tool/software: Hello, Is it possible to use this setup to test the daisy chain feature with the following setup: PC -> EVM 983 -> Display with 988 -> Display with 988 -> Display with 988 ~ Franz

  • [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…

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