Tutorial: MC6840 / MC68A40

Adapts or transmits signals between devices.

MC6840 / MC68A40

Tutorial / documentation

Communication

Quick documentation & first test preparation

  1. Identify component MC6840 and its package.
  2. Identify the protocol, logic levels and each pin’s function.
  3. Check required termination and pull-up/pull-down resistors.
  4. Consult the application circuit in the linked documentation before testing.

MC6840

Motorola Programmable Timer Module, 1.0MHz, DIP-28

  • Motorola Programmable Timer Module, 1.0MHz, DIP-28
  • Identify the protocol, logic levels and each pin’s function.
  • Check required termination and pull-up/pull-down resistors.
  • The manufacturer’s pinout and absolute limits take precedence over this page.
Technical documentation

MC68A40

Motorola Programmable Timer Module, 1.5MHz, DIP-28

  • Motorola Programmable Timer Module, 1.5MHz, DIP-28
  • Identify the protocol, logic levels and each pin’s function.
  • Check required termination and pull-up/pull-down resistors.
  • The manufacturer’s pinout and absolute limits take precedence over this page.
Technical documentation

Inputs and outputs must match the function described in the selected reference’s documentation.