Low-Power Schottky 74LS Series IC 74LS122 74LS125 74LS132 74LS164 74LS243 (DIP-14)

• 74LS Series:
• 74LS122 – Retriggerable Monostable Multivibrators
• 74LS125 – Quadruple Bus Buffer Gates with 3-State Outputs
• 74LS132 – Quadruple 2-Input Schmitt Trigger NAND Gates
• 74LS164 – 8-Bit Parallel-Out Serial-In Shift Registers
• 74LS243 – Quadruple Bus Transceivers

• The “74LS” designation in digital logic ICs (integrated circuits) stands for “Low-Power Schottky” and refers to a family of TTL (Transistor-Transistor Logic) circuits that offer a balance between speed and low power consumption, using Schottky transistors to enhance switching speeds.

• Here’s a more detailed breakdown:

• 74 Series:
  This is a broad family of logic ICs, often referred to as TTL (Transistor-Transistor Logic), though newer series don’t necessarily use TTL circuitry.

• LS: “LS” specifically means “Low-Power Schottky”.

• Schottky Transistors:
  These transistors use Schottky diodes to prevent transistor saturation, which leads to faster switching speeds and lower power consumption compared to standard TTL.

• Low-Power:
  The 74LS series is designed to consume less power than the original 74 series TTL, making it suitable for applications where power efficiency is important.

• Speed:
  While offering lower power consumption than the original 74 series, the 74LS series still provides a good level of speed, thanks to the Schottky transistors.

• Compatibility:
  The 74LS series is generally compatible with other 74 series ICs (e.g., 74HC, 74HCT), allowing for mixing and matching in some applications.