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TS3L301: NOISE MARGIN VOH,VOL,VIH,VIL DATA

vikrant sugandhi
Prodigy 40 points
Part Number: TS3L301

Hi All,

I am using TS3L301 LAN SWITCH in one of my schematics.

I want to confirm by Noise margin analysis(NMH/NML) that interface between this and other IC(TCI6638K2KCXAAWA2) is within tolerance.

But in datasheet, I am not getting VOH,VOL,VIH,VIL data.

Pls, guide how to proceed.And in some cases(usually Level translators), some data is not given I think this is up to us to decide by choosing proper pull-up/Pull-Down Resistor.

Please correct if I am wrong.

Regards

Vikrant

  • 0
    TI__Expert 3180 points

    Hello Vikrant,

    Since this device is a switch, you really need to pay attention to these two details for input/outputs:

    1) You will only have a VIH/VIL for the pin that determines which channels are open

    2) What input values MIN/MAX is recommended for the input to your switches

    I have attached the datasheet for the TS3L301 below, where I highlighted the VIH and VIL spec for the select line (SEL) which determines which channels are on. I have also circled the recommended input/output voltage (Vi/o) voltage that would fit with the VIH and VIL.

    As for the pull-up/down resistor, that is generally up to the user. For most applications there is common restive value used such as i2c. But the idea is that this simply makes for a very weak voltage source and allows you to keep the pin from floating as it can affect your system. 

    Thank you and if I have answered your questions, could you please verify the answer,

    Louie