The HEF4011B is a quad 2-input NAND gate. The outputs are fully buffered for the highest noise immunity and pattern insensitivity to output impedance. It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS(usually ground). Unused inputs must be connected to VDD, VSS, or another input.

Key features and benefits
Mixed 5 V and 3.3 V applications
Reduce time to market for complex designs
Save board space
Open-drain output options
Improved signal integrity for complex layouts
Wide supply voltage range
Low propagation delay
Overvoltage tolerant options
Low input threshold options
CMOS low power

4000 CMOS Logic Family, Nexperia

CMOS Family devices
Wide operating voltage range: 3 to 18V