These devices contain four independent 2-input NAND gates in a DIP-14 through hole package. But because of the Schmitt action, the gates have different input threshold levels for positive (VT+) and negative (VT-) signals.

Electrical Characteristics

• Supply voltage (VCC): 5 V
• High Level Input Voltage (VIH): 2 V
• High Level Input Current (IIH): 40 uA
• Low Level Input Voltage (VIL): 0.8 V
• Low Level Input Current (IIL): -0.8 mA
• High Level Output Voltage (VOH): 3.4 V
• High Level Output Current (IOH): -0.8 mA
• Low Level Output Voltage (VOL): 0.2 V
• Low Level Output Current (IOL): 16 mA
• Operating free-air temperature: 70°C (max)
• Positive Threshold Voltage (VT+): 1.7 V
• Negative Threshold Voltage (VT-): 0.9 V

Pinout

Hysteresis curve

 Datasheet