In a binary system, this is the voltage level that represents a boolean false or a digital 0. It is usually close to ground potential. For 5V TTL logic, any voltage below 0.8 volts is reliably interpreted as a low state.
Heard on the job
Tie that unused enable pin to logic low so the chip doesn't randomly activate from noise.
Related terms
Logic high
The higher of two voltage states used to represent a binary one in a digital circuit.
Logic level
A specific voltage range that represents a distinct binary state in a digital circuit.
Pull-down resistor
A resistor connected between a logic pin and ground to hold the line at a logic low state.