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Products
Part No: FT221XS
USB Full Speed to 8-Bit SPI/FT1248 IC with USB Charger Detection, SSOP-20
USB to 8-Bit SPI / FT1248 interface
Standard Price (Easy checkout)
| Order Quantity | Price per Unit | |
| 1 - 24 | : | USD2.29 |
| 25 - 99 | : | USD2.22 |
| 100 - 249 | : | USD2.15 |
| 250 - 499 | : | USD1.95 |
| 500 - 999 | : | USD1.77 |
| 1000 - + | : | Ask for quote |
| Old datecode available, - please email sales1@ftdichip.com | : | Ask for quote |
*Request quote for large quantities
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FT221X – Full Speed USB to 8-bit SPI / FT1248 Bridge
This USB2.0 Full Speed IC offers a compact bridge to 8-Bit SPI/FT1248 interfaces. The device is a FT1248 slave, capable of operating up to 1MByte/s, with low power consumption (8mA). The FT221X includes the complete FT-X series feature set and enables USB to be added into a system design quickly and easily over an FT1248 interface
Key Hardware Features
- FT1248 serial parallel interface in 1, 2, 4, or 8 bit wide mode.
- Similar to an SPI slave in 1 bit mode
- Entire USB protocol handled on the chip. No USB specific firmware programming required.
- Fully integrated 2048 byte MTP Memory for storing device descriptors and CBUS I/O configuration.
- Fully integrated clock generation with no external crystal required plus optional clock output selection enabling a glue-less interface to external MCU or FPGA.
- Data transfer rates to 1MByte/s.
- 512 byte receive buffer and 512 byte transmit buffer utilizing buffer smoothing technology to allow for high data throughput.
- FTDI’s royalty-free Virtual Com Port (VCP) and Direct (D2XX) drivers eliminate the requirement for USB driver development in most cases.
- Configurable CBUS I/O pin.
- Device supplied pre-programmed with unique USB serial number.
- Supports bus powered, self powered and high-power bus powered USB configurations.
- Integrated +3.3V level converter for USB I/O.
- True 3.3V CMOS drive output and TTL input. (operates down to 1V8 with external pull-ups)
- I/O levels from 1.8V to 3.3V. (5V tolerant inputs).
- Configurable I/O pin output drive strength.
- Battery Charger Detection. May be used by mobile devices to detect the presence of a charger on the USB port to enable higher current / faster charging of batteries.
- Integrated power-on-reset circuit.
- Internal 3.3V/1.8V LDO regulators
- Low operating current of 8mA (typical) and USB suspend current of 125uA (typical) current.
- Low USB bandwidth consumption.
- UHCI/OHCI/EHCI host controller compatible.
- USB 2.0 Full Speed compatible.
- Extended operating temperature range: -40°C to 85°C
- 20 Pin SSOP and QFN packages (both RoHS compliant).
Package
Partial, Tray or Reel
| Part No: | FT221XS (qty 1-57) | Package Type: | Partial (Cut Tape) |
| Part No: | FT221XS-U (qty 58-2999) | Package Type: | TUBE |
| Part No: | FT221XS-R (qty >=3000) | Package Type: | REEL |
Typical Applications
- USB to SPI interface in 1-bit mode
- Dedicated Charger Port (DCP) detection enabling battery charging at higher current for faster charge times.
Datasheet
| Number | Title | Revision | Relevant Devices |
| FT221X Datasheet | 1.6 |
Application Notes
| Number | Title | Revision | Relevant Devices |
| AN_206 | FT1248-1 Bit SPI | 1.0 | FT-X |
Technical Notes
| Number | Title | Revision | Relevant Devices |
| TN_138 | FT221X Errata Technical Note | 1.4 |
Development/Evaluation Kit
| Item Code | Comments | Datasheet | |
|---|---|---|---|
 |
UMFT221XA-01 | Development module - USB to Enhanced 8-Bit SPI / FT1248, 0.3” wide | Datasheet |
 |
UMFT221XE-01 | Development module - USB to Enhanced 8-Bit SPI / FT1248, 0.6” wide | Datasheet |