text.skipToContent text.skipToNavigation

Manufacturer Part #


USB Full Speed to 8-Bit SPI/FT1248 IC with USB Charger Detection, SSOP-20

ECAD Model:
Mfr. Name: FTDI Chip
Standard Pkg:
Product Variant Information section
Date Code:
Product Specification Section
Technical Attributes
Attributes Table
Data Rate: 1Mbps
No of Channels: 1
Supply Voltage: 5V
Operating Temp Range: -40°C to +85°C
Package Style:  SSOP-20
Mounting Method: Surface Mount
Features & Applications
The FT221XS-U is a USB to FTDI's proprietary FT1248 interface. It is available in 20 pin SSOP package.


  • FT1248 serial parallel interface in 1, 2 or 4 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
  • Data transfer rates to 500 kByte/s
  • Configurable CBUS I/O pin
  • Device supplied pre-programmed with unique USB serial number
  • 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)
  • Configurable I/O pin output drive strength; 4 mA(min) and 16 mA(max)
  • Integrated power-on-reset circuit
  • Fully integrated AVCC supply filtering - no external filtering required
  • +5 V Single Supply Operation
  • Internal 3V3/1V8 LDO regulators
  • Low USB bandwidth consumption
  • UHCI/OHCI/EHCI host controller compatible
  • USB 2.0 Full Speed compatible
  • Extended operating temperature range; -40 to 85⁰C


  • USB to SPI interface in 1-bit mode
  • Upgrading Legacy Peripherals to USB
  • Utilising USB to add system modularity
  • USB Industrial Control
  • USB MP3 Player Interface
  • USB FLASH Card Reader and Writers
  • Set Top Box PC - USB interface
  • USB Digital Camera Interface

View the available FT221 series of USB controllers

Pricing Section
Global Stock:
On Order:
Factory Stock:Factory Stock:
Factory Lead Time:
26 Weeks
Minimum Order:
Multiple Of:
Web Price
Product Variant Information section