74LS14 Hex Inverter Schmitt Trigger


The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS14 Hex Inverter Schmitt Trigger functions as an inverter. However, because of the Schmitt-Trigger action, they have different input threshold levels for positive-going (VT+) and negative-going (VT– ) signals

74LS14 Features

  • Six Independent INVERT Gates
  • Standard Pin Configuration
  • Fast Switching Times
  • Operating Temperature up to 70°C
  • Standard TTL Switching Voltages

74LS14 Specifications

Supply Voltage4.75 – 5.25Vdc
Maximum Clock Frequency40Mhz
Power Dissipation2mW/gate @100kHz
Minimum Output Current8mA
Propagation Delay10nS
Fan Out (TTL Loads)20

74LS14 Pinout Diagram

74LS14 Pin Description

Pin NoPin NameDescription
1A1Inverter Gate 1 Input
2B1Inverter Gate 1 Output
3A2 Inverter Gate 2 Input
4B2 Inverter Gate 2 Output
5A3 Inverter Gate 3 Input
6B3 Inverter Gate 3 Output
8B4 Inverter Gate 4 Output
9A4 Inverter Gate 4 Input
10B5 Inverter Gate 5 Output
11A5 Inverter Gate 5 Input
12B6 Inverter Gate 6 Output
13A6 Inverter Gate 6 Input
14VCCPositive Supply

74LS14 Circuit


  • HVAC Gateways
  • Residential Ductless Air Conditioning Outdoor Units
  • Robotic Controls
  • Industrial Stepper Motors
  • Power Meter and Power Analyzers
  • Digital Input Modules for Factory Automation

74LS14 Alternative Equivalent

74LS04, 74LS05, 74LS06

Download 74LS14 Hex Inverter Schmitt Trigger Datasheet from the link given below.