FT122 - Full speed USB device controller

The FTDI FT122 provides a cost and feature optimized USB full-speed device controller. The design builds on the FT120, by adding battery charger detection and internal clocking to reduce the PCB space required to complete the design.

The FT122 provides a cost and feature optimized USB full-speed device controller. The design builds on the FT120, by adding battery charger detection and internal clocking to reduce the PCB space required to complete the design. Communicating with a micro-controller over the generic parallel interface the device will appear as another memory device on the processor bus, offering USB connectivity with bulk, isochronous or interrupt endpoints.

Key features:

  • USB 2.0 Full Speed compatible
  • Support for multiple interrupt modes to facilitate bulk and isochronous transfers
  • Fully autonomous DMA engines for fast data transfer
  • Supports high-speed parallel interface to external microcontroller
  • Separate address/data or multiplexed address/data bus
  • Integrated 2kbytes of configurable endpoint buffer
  • Double buffer scheme for main endpoint improves data transfer rates.
  • Dedicated clock output pin with programmable clock frequency (4 - 48 MHz)
  • Good USB connection indicator that blinks with USB transmit and receive activities
  • Internal clocking:- no external crystal required
  • Battery Charger Detection
  • Single power supply operation at 3.3V or 5V
  • Internal 1.8V and 3.3V LDO regulators
  • Extended operating temperature range : -40°C to 85°C
  • Available in Pb-free TSSOP-28 and QFN-28 packages (RoHS compliant)


  • USB 2.0 Full Speed compatible
  • High performance USB device controller with integrated SIE, endpoint buffer, transceiver and voltage regulators
  • Fully integrated clock generation with no external crystal required
  • Supports 8-bit parallel interface to external microcontroller
  • Supports DMA operation
  • Supports up to 8 bi-directional endpoints with total 2K bytes endpoint buffer
  • Max packet size is 504 bytes for isochronous endpoint and 64 bytes for control/bulk/ interrupt endpoint
  • Double buffer scheme for any endpoint increases data transfer throughput
  • Multiple interrupt modes to facilitate both bulk and isochronous transfers
  • USB Battery Charger detection allowing optimized charging profile
  • Dedicated clock output pin with programmable clock frequency (4 - 24 MHz)
  • 30 kHz output clock provided during suspend
  • Integrated DP pull-up resistor for USB connection
  • USB connection indicator that toggles with USB transmit and receive activities
  • Supports bus powered or self powered application
  • VCC power supply operation at 3.3V or 5V
  • Internal 1.8V and 3.3V LDO regulators
  • VCC IO level range from 1.8V to 3.3V
  • Integrated power-on-reset circuit
  • UHCI/OHCI/EHCI host controller compatible
  • -40°C to 85°C extended operating temperature range
  • Available in Pb-free TSSOP-28 and QFN-28 packages (RoHS compliant)
  • Provide USB port to Microcontrollers
  • Provide USB port to FPGA's
  • USB Industrial Control
  • Mass storage data transfers for multitude of embedded systems applications, including medical, industrial data-logger, power-metering, and test instrumentation
  • Utilising USB to add system modularity
  • Isochronous support for video applications in security, industrial control, and quality inspections
Part Number Description Pack Size
FT122T-R 28-pin TSSOP single chip full speed USB device controller IC Reel of 2,500
FT122T-U
28-pin TSSOP single chip full speed USB device controller IC
Tube of 50
FT122Q-R
28-pin QFN single chip full speed USB device controller IC
Reel of 6,000
UMFT12XEV Main board for evaluating FT120, FT121 and FT122 add-on modules. Fitted with LPC1114 Cortex-M0 MCU. Firmware upgradable with UART or SWD interface. Note: Board is shipped with firmware to support CDC class devices pre-loaded Each
UMFT122DC FT122 add-on module. 8-bit 8051 parallel bus. 8 bi-directional endpoints. I/O level 1.8/2.5/3.3V.
Each

The FTDI UMFT12 Evaluation Kit provides a complete evaluation and prototyping platform for FT12 series devices. The UMFT12XEV contains an LPC1114 controller to host the FT12X daughter card to enable testing of firmware for the FT12 series devices. Each device (FT120, FT121, and FT122) has a separate daughter card to plug in to the UMFT12XEV and a mini-B USB connector for attaching to external USB host controllers.

AlphaMicro_FTDI_UMFT12xEV(02)_180pxAlphaMicro_FTDI_UMFT122A(02)_180px

Related Products

Recently Viewed Products

Last updated: 11 August 2013