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SN74CB3Q3125: some questions about SN74CB3Q3125

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Replies: 3

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Part Number: SN74CB3Q3125

Hi team,

We have some questions about the SN74CB3Q3125PWR.

1. whether the input is the mosfet structure?

2. whether the input can accept higher negative voltage -2v with smaller time(20ns)?

3. What's the meaning of VIK?-1.8V.

Thanks.
1SN74CB3Q3125PWR输入是否为MOSFET结构?
2)规格书要求输入VI/0最小值大于-0.5V,如果输入为MOSFET结构,I/O输入是否可以超出-0.5V,是否有例如-2.0V20ns)这种要求。
3VIK值可以达到-1.8VVIK的含义指的是什么?谢谢!

  • Hi

    Thank you for using e2e:

    1. whether the input is the mosfet structure?

    The SN74CB3Q3125 is an NMOS series switch with a charge pump. The charge pump elevates the gate voltage of the pass transistor, providing a low and flat ON-state resistance (ron).


    2. whether the input can accept higher negative voltage -2v with smaller time(20ns)?

    The recommended input voltage range for the  SN74CB3Q3125 is 0V-5V. 

    Also note the II/OK current max is -50mA specd at VI/O < 0. What this means is that clamping diode from Vin to GND will kick in and clamp negative voltages upto -50mA max.


    3. What's the meaning of VIK?-1.8V.

    VIK is undershoot voltage of this device which is -1.8V when Vcc=3.6V.

     

    Thanks

    Saminah

     

  • In reply to Saminah C:

    hi Saminah,

    whether we can consider the I/O can accept VI/K to -1.8v if the current is below 50mA? Thanks.

  • In reply to Frank Xiao:

    Hi Frank,

    If you look at the note below the Abs max ratings, the input and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed, however for better performance, it is recommended that part functions under the recommended operating conditions.

    Thanks

    Saminah