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TS3DDR4000: About the internal parameters....

Peter Tseng
Genius 5555 points
Part Number: TS3DDR4000

Dear Sirs,

I have some questions about the IC internal design!

1. What is the spec. of the protection diode in the IC?

2. What is the impedance of I/O to GND?

Thanks. 

  • 0
    TI__Mastermind 43245 points

    Hi Peter,

    1.The protection diodes are spec'd w.r.t. ESD ratings as shown below:

    Beyond this the values stated in the absolute maximum specs are there so that IC and the protection diodes aren't ruined. Exceeding Abs max/min can cause damage to the protection inside the device.

    2. We don't calculate an impedance from I/O to ground. Under normal operating conditions connection is essentially an open circuit - with a small amount of leakage current going into the protection diode(s). Since there isn't current normally flowing from I/O to ground the I/O pin , if left floating, will not pull down the pin.

    If you have any other questions please let me know!

    Best,

    Parker Dodson