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SN74AHC1G04: NC pin

Hirotaka Matsumoto
Guru 27585 points
Part Number: SN74AHC1G04


Hi all

Would you mind if we ask SN74AHC1G04?

<Question1>
1Pin(NC) does not connect to any pin internally, right?

<Question2>
Which is the better handling for NC pin?
-Connection to GND(Does it help radiation of heat?)
-Connection to Pull up with 10kohm(VDD)

Kind regards,

Hirotaka Matsumoto

  • 0
    TI__Guru* 97066 points

    Hello Matsumoto-san,

    You are correct - pin 1 (NC) does not connect to any pin internally (there is no bond wire to that pin)

    Connecting with a 10kohm resistor is unnecessary since there is no electrical connection there.

    It is recommended to solder the pad down for mechanical strength, and connecting it to a ground plane will help with thermal dissipation- although most logic devices don't require any additional heat-sinking. The power they consume is typically very small, even under maximum load.