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Logic Level

maker

Logic level refers to the specific voltage levels that represent logical states in digital circuits.

expanded

In digital electronics, logic levels define the voltage thresholds which determine whether a digital signal is a logical high ('1') or low ('0'). These levels dictate how components such as microcontrollers, NAND gates, and flip-flops interpret input signals, making them critical for ensuring compatibility between different devices operating within the same circuit.

examples

A 5 V TTL logic device characteristically uses 0 V to 0.8 V to represent a logical low and 2 V to 5 V for a logical high.

This is commonly used in older microcontroller interfaces and legacy digital systems where TTL compatibility is required.

A 3.3 V CMOS logic circuit uses voltage levels below 0.3 V for logic low and above 2.7 V for logic high, facilitating lower power consumption.

Seen in modern microcontrollers and low-power consumer electronics where minimizing energy usage is vital.