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SN74LV123A: About CEXT terminal

soichiro kikuchi
Intellectual 260 points

Part Number: SN74LV123A

image.png

In this figure, does the movement change when the CEXT terminal is connected to GND or not?

  • 0
    Guru 327710 points

    The application note says:

    5.6 Can I connect the Cext pin to ground?

    It is best to follow the datasheet recommendations. If your monostable multivibrator recommends not connecting Cext to ground, then do not connect it to ground.

    In some monostable multivibrators the Cext pin is internally tied to ground, but in some it is not. If the datasheet is unclear and the information is required, use an ohmmeter to check the resistance between the two pins. If the resistance reads less than 1 Ω, it is safe to connect both to ground.