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ESD321: pin1 position

Mia Ma
Intellectual 2355 points
Part Number: ESD321

Tool/software:

Hi team,

For out ESD321DYAR, the pin layout is as below 

 

So does that mean the start of the marking '1L8' is the PIN 1, if this understanding is correct?

Thanks

Best regards

Mia

  • 0
    TI__Genius 15230 points

    Hi MIa,

    '1L8' is just the device marking.

    Pin 1 can be identified by a circulator notch near the lead. 

    Regards,

    Sebastian 

  • 0 in reply to Sebastian Muriel
    TI__Intellectual 2355 points

    Hi Sebastian

    Thanks for your feedback.

    I would like to double check for two more points here:

    Q1: For sure, for the DYA package, the PIN 2 is the IO pin, and the pin 1 is the GND; the 1st page datasheet is referring to DPY package?

    Q2: for the DYA package, does the marking have the line? What does the package in datasheet the ID area means, referring to the circulator?

    Thanks

    Best regards

    Mia 

  • 0 in reply to Mia Ma
    TI__Genius 15230 points

    Hi Mia,

    Q1: Your understanding is correct, pin 2 will be the input of the ESD diode.

     The typical application diagram would be the pinout for DPY not DYA.

    Q2: The DYA package will be marked with the circular notch to indicate pin 1, not the line as shown in the package drawing. This was done to avoid issues with the device markings being confused with the line marking for pin 1.

    If pin 2 is connected to the data/power line you want to protect as shown in the image, it is connected correctly. 

    Regards,

    Sebastian 

  • 0 in reply to Sebastian Muriel
    TI__Intellectual 2355 points

    Hi Sebastian

    Well noted, it's very clear now.

    Thanks

    Best regards

    Mia