The HEF4093B is a quad two-input NAND gate. Each input has a Schmitt trigger circuit. The gate switches at different points for positive-going and negative-going signals. The difference between the positive voltage (VT+) and the negative voltage (VT-) is defined as hysteresis voltage (VH). 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