General Description
The CD4093B consists of four Schmitt-trigger circuits. Each circuit functions as a 2-input NAND gate with Schmitt trigger action on both inputs. The gate switches at different points for positive and negative-going signals. The difference between the positive (VT+) and the negative voltage (VT−) is defined as hysteresis voltage (VH).
All outputs have equal source and sink currents and conform to standard B-series output drive (see Static Electrical Characteristics).

Features
■ Wide supply voltage range: 3.0V to 15V
■ Schmitt-trigger on each input with no external components
■ Noise immunity greater than 50%
■ Equal source and sink currents
■ No limit on input rise and fall time
■ Standard B-series output drive
■ Hysteresis voltage (any input) TA = 25°C
   Typical
      VDD = 5.0V VH = 1.5V
      VDD = 10V VH = 2.2V
      VDD = 15V VH = 2.7V
   Guaranteed
      VH = 0.1 VDD
     
Applications
• Wave and pulse shapers
• High-noise-environment systems
• Monostable multivibrators
• Astable multivibrators
• NAND logic