74HCT4011

The 74HCT4011 is a high-speed CMOS integrated circuit containing four independent 2-input NAND gates. It belongs to the 74HCT family, which combines CMOS circuitry with TTL-compatible input thresholds to facilitate interfacing with TTL logic while using CMOS power characteristics.

Each device provides four two-input NAND gates with standard dual-input, single-output configurations. The gates share a common power supply, and the package typically comes in standard logic formats such as DIP-14 and small-outline packages. The device is commonly used in digital logic designs for implementing basic logic functions, gating, and as building blocks in larger circuits.

Electrical characteristics for the 74HCT4011 are designed for 5-volt operation. The supply voltage range is typically 4.5 to 5.5 volts. The inputs are TTL-compatible, with a high-level input threshold around 2.0 volts minimum and a low-level input threshold around 0.8 volts maximum, enabling reliable interfacing with TTL devices. Input leakage is typically small, and the outputs are standard CMOS push-pull, capable of driving moderate loads with both sourcing and sinking current. The device draws very little static current when not switching, though dynamic current increases with switching activity.

Truth functionality follows the NAND logic: the output of each gate is low only when both inputs are high; otherwise, the output is high. The 74HCT4011 is widely used in digital circuits requiring multiple identical NAND gates in a compact package and can be easily integrated with TTL-compatible logic due to its input thresholds.

Variants and related devices include other 74HCT NAND configurations and the broader 4000-series NAND families such as 74HC4011 for faster CMOS performance.