4011B

4011B is a designation used for a quad two-input NAND gate in the 4000-series family of CMOS logic devices. The part is widely sold under variations such as CD4011B or simply 4011B by different manufacturers, with the exact meaning of the suffix “B” varying by vendor. Functionally, the device consists of four independent NAND gates, each with two inputs and one output, making it a versatile building block for digital circuits.

In operation, the 4011B provides the same logic function as other 2-input NAND devices in the 4000-series. It is valued for its simplicity, robustness, and broad operating voltage range. While electrical characteristics depend on the specific manufacturer and process, 4011B parts are typically designed to operate from a few volts up to around 12–15 volts, with low static power consumption and moderate propagation delays that scale with supply voltage and load.

Packaging and form factors commonly found for 4011B devices include the 14-pin DIP and various surface-mount options such as SOIC and others. The part is commonly used in basic logic circuits, timing networks, gating, and as a building block for universal logic implementations, including daisy-chained NAND configurations to realize other logic functions.

History and context: the 4000-series CMOS logic family originated in the 1970s and has since been produced by many manufacturers, including major semiconductor companies. The 4011B variant remains popular due to its wide voltage range, compatibility with CMOS logic, and availability in multiple packages. As with any part number bearing a suffix, exact specifications, packaging, and temperature grades should be confirmed from the supplier’s datasheet.