74LS155 / 74LS156

Combines, stores or sequences digital signals.

Tutorial / documentation

Logic & timing

Quick documentation & first test preparation

  1. Identify component 74LS155 and its package.
  2. Read the truth table or timing diagram.
  3. Check the logic family, power supply and states of unused inputs.
  4. Consult the application circuit in the linked documentation before testing.

74LS155

Dual 2 to 4 lines Decoder/Demultiplexer

  • Dual 2 to 4 lines Decoder/Demultiplexer
  • Read the truth table or timing diagram.
  • Check the logic family, power supply and states of unused inputs.
  • The manufacturer’s pinout and absolute limits take precedence over this page.
Technical documentation

74LS156

Dual 2 to 4 lines Decoder/Demultiplexer, Open Collector

  • Dual 2 to 4 lines Decoder/Demultiplexer, Open Collector
  • Read the truth table or timing diagram.
  • Check the logic family, power supply and states of unused inputs.
  • The manufacturer’s pinout and absolute limits take precedence over this page.
Technical documentation