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Frequent questions

  • [FAQ] DP83869HM: How to generate 125MHz on CLKOUT pin for DP83869

    Part Number: DP83869HM DP83869HM needs an additional register to be written to enable CLKOUT modification. By default, this signal is a buffered version of the XI signal. Reg 0xC6 must have 0x10 written in order for the value in Reg 0x170[12:8] to take…

  • [FAQ] TI Ethernet PHY Capacitive Coupling (Transformerless Operation)

    Other Parts Discussed in Thread: DP83869 Summary: All of our Industrial Ethernet PHYs support Transformer-less Operation via Capacitive Coupling except for the DP83867. The DP83867 does not support Transformer-less Operation. List of Industrial…

  • [FAQ] DP83867E: Ethernet PHY SGMII Vdiff Upper and Lower Input Limits

    Part Number: DP83867E Other Parts Discussed in Thread: DP83869 The DP83867 and DP83869 both have the same Vdiff Upper and Lower Input Limits of: 100 mV and 800 mV

  • [FAQ] What capacitance should my ESD diode be?

    Other Parts Discussed in Thread: ESD2CANXL24-Q1 , ESD2CAN24-Q1 , ESD2CANFD24-Q1 , ESD122 What should be considered when selecting a diode with parasitic capacitance?

  • [FAQ] DP83825I: How to adjust the Output Differential Voltage (VOD) of the DP83825I

    4540.DP83825I VOD Adjustment.pptx

  • [FAQ] DP83TG720R-Q1: Why is my SGMII eye measurement distorted?

    Part Number: DP83TG720R-Q1 SGMII signal is high frequency low-voltage differential signal. Both layout design and measurements need to be accurate for good eye diagram capture. Common board design guidelines: 100ohms+/-10% differential traces…

  • [FAQ] Can an ESD diode experience latch-up?

    Other Parts Discussed in Thread: STRIKE Is there a risk of latch-up with ESD diodes? Should this be taken into design consideration?

  • [FAQ] What is the difference between TLP and 8/20μs clamping voltages on ESD diode datasheets?

    Other Parts Discussed in Thread: ESD321 , STRIKE What is the TLP clamping voltage, and how is it different compared to the 8/20μs clamping voltage? Take the electrical characteristics for ESD321 as an example:

  • [FAQ] LMH0303: How to Tune LMH0303 LMH0307 Cable Fault detection

    Part Number: LMH0303 Other Parts Discussed in Thread: LMH0307 , Background: The LMH0307/3 termination fault detection was never designed to be precise; its purpose is to provide an indication when no cable is connected to the output (near end). The…

  • [FAQ] DS90UB953-Q1: Does this Serializer have failure mode regarding delayed/frozen video transmission?

    Part Number: DS90UB953-Q1 Hi TI expert Can you pls help to confirm if the serializer (DS90UB953)can have Frozen and delayed video output failure modes? If Yes, pls share the safety mechanisms for these failure modes. Thanks Br Weicheng

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