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SN74LVC2G07: Dual buffer (open-drain) with enable function

Yunsheng Luo
Intellectual 1300 points
Part Number: SN74LVC2G07
Other Parts Discussed in Thread: SN74LVC2G32, SN74LVC2G125, SN74LVC1G97

Hi,

Customers need Dual Buffer with Open-Drain outputs, such as SN74LVC2G07, but with enable function. I only found Dual buffer (3-state output) with enable function in ti.com.

so could you please recommend me a Dual buffer(open-drain output) with enable function.(Vcc=5V)

Thank you so much.

Regards,

Yunsheng Luo

  • +1
    Guru 287860 points

    There is no integrated device that can do this. But an open-drain buffer's output is disabled when the input is high; alternatively, a three-state's buffer output behaves like a high open-drain output when it is disabled.

    So use the SN74LVC2G07, and combine the input signal and the /OE input with an OR gate, e.g., SN74LVC2G32.
    Alternatively, use the SN74LVC2G125, connect its input to your input, and connect its /OE to the OR combination of the input and your /OE signal.

    If your enable signal is active high, you need OR gates with one inverted input, e.g., 2× SN74LVC1G97.