Tutorial: FT221XQ / FT221XS

Adapts or transmits signals between devices.

FT221XQ / FT221XS

Tutorial / documentation

Communication

Quick documentation & first test preparation

  1. Identify component FT221XQ 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.

FT221XQ

Full Speed USB to 8-Bit SPI / FT1248 Bridge, QFN-20

  • Full Speed USB to 8-Bit SPI / FT1248 Bridge, QFN-20
  • 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

FT221XS

Full Speed USB to 8-Bit SPI / FT1248 Bridge, SSOP-20

  • Full Speed USB to 8-Bit SPI / FT1248 Bridge, SSOP-20
  • 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.