Why is a pull up resistor needed for an open collector gate?

Q: Why is a pull up resistor needed for an open collector gate?

A pull-up resistor <b>keeps the input high by connecting unused pins to the supply</b>. Some open-collector gates, such as the 74LS06 are capable of driving larger loads because their outputs can be connected to supplies of up to 30 volts.

Question

A pull-up resistor keeps the input high by connecting unused pins to the supply. Some open-collector gates, such as the 74LS06 are capable of driving larger loads because their outputs can be connected to supplies of up to 30 volts.

Hagrid P Hazard · Accepted Answer

A pull-up resistor keeps the input high by connecting unused pins to the supply. Some open-collector gates, such as the 74LS06 are capable of driving larger loads because their outputs can be connected to supplies of up to 30 volts.

Why is a pull up resistor needed for an open collector gate?

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