{"id":8555,"date":"2026-06-29T05:13:14","date_gmt":"2026-06-29T05:13:14","guid":{"rendered":"https:\/\/materialparts.com\/ft234xd-r\/"},"modified":"2026-06-29T05:13:14","modified_gmt":"2026-06-29T05:13:14","slug":"ft234xd-r","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ft234xd-r\/","title":{"rendered":"FT234XD-R"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The FT234XD-R from FTDI Chip is an ultra-compact USB 2.0 full-speed to UART serial interface bridge in a 3mm x 3mm DFN-12 package. It converts USB to a UART serial port with data rates from 300bps to 3Mbaud, requires no external crystal, and supports 1.8V to 3.3V I\/O voltage, making it ideal for space-constrained embedded systems and IoT devices.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
USB Interface<\/td>\nUSB 2.0 Full-Speed (12Mbps)<\/td>\n<\/tr>\n
UART Data Rate<\/td>\n300bps ~ 3Mbaud<\/td>\n<\/tr>\n
Supply Voltage (VCC)<\/td>\n2.97V ~ 5.5V (internal 1.8V LDO)<\/td>\n<\/tr>\n
I\/O Voltage<\/td>\n1.8V ~ 3.3V (configurable)<\/td>\n<\/tr>\n
TX\/RX FIFO<\/td>\n512 bytes each<\/td>\n<\/tr>\n
Hardware Handshake<\/td>\nCTS#, RTS#<\/td>\n<\/tr>\n
Integrated EEPROM<\/td>\n2048-byte MTP for VID\/PID\/serial<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C ~ +85C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nDFN-12 (3mm x 3mm, 0.5mm pitch)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Crystal-less operation with internal clock recovery from USB<\/li>\n
  • Configurable CBUS pins for LED, sleep, and clock outputs<\/li>\n
  • USB battery charging detection (BCD) support<\/li>\n
  • 2048-byte MTP memory for custom VID\/PID and serial number<\/li>\n
  • Configurable I\/O drive strength (4mA ~ 16mA)<\/li>\n
  • UART signal inversion option for legacy device compatibility<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • USB-to-serial adapters and cables<\/li>\n
    • Embedded system debug and programming interfaces<\/li>\n
    • IoT device firmware update ports<\/li>\n
    • Wireless module configuration interfaces<\/li>\n
    • Portable instrumentation data logging<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The FT234XD-R from FTDI Chip is an ultra-compact USB 2.0 full-speed to UART serial interface bridge in a 3mm x 3mm DFN-12 package. It converts USB to a UART serial port with data rates from 300bps to 3Mbaud, requires no external crystal, and supports 1.8V to 3.3V I\/O voltage, making it ideal for […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[186],"class_list":["post-8555","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-ftdi"],"acf":{"brief_explanation":"FTDI USB 2.0 FS to UART bridge, 3Mbaud, DFN-12 3x3mm, crystal-less, 1.8V~3.3V I\/O","date_code":"","package_case":"DFN-12 (3mm x 3mm, 0.5mm pitch)","in_stock":14066,"datasheet":"https:\/\/ftdichip.com\/wp-content\/uploads\/2020\/07\/DS_FT234XD.pdf","price":"$1.20 @ 1ku","product_introduction":"The FT234XD-R from FTDI Chip is a single-channel USB 2.0 full-speed to UART bridge controller in an ultra-compact DFN-12 package measuring just 3mm x 3mm. The device eliminates the need for an external crystal by recovering the clock from the USB data stream, reducing BOM cost and board area. It supports UART data rates from 300bps to 3Mbaud with 512-byte transmit and receive FIFOs for smooth data flow. The integrated 2048-byte MTP (Multi-Time Programmable) memory stores USB Vendor ID, Product ID, serial number, and other configuration data. Three CBUS pins can be configured for TX\/RX LEDs, sleep mode indication, or clock output functions. The I\/O voltage is independently configurable from 1.8V to 3.3V, enabling direct connection to low-voltage MCUs and FPGAs without level shifters.","working_principle":"The FT234XD-R operates as a bridge between the USB host and a UART serial port. On the USB side, the device enumerates as a Virtual COM Port (VCP) using FTDI drivers or as a D2XX direct driver device. USB data is received and placed into the 512-byte receive FIFO, then serialized out the TXD pin at the configured baud rate. Similarly, data received on RXD is packed into the 512-byte transmit FIFO and sent to the USB host. The internal 1.8V LDO generates the core supply from VCC (2.97V~5.5V), and a 0.1uF capacitor on VDD decouples this rail. The MTP EEPROM is programmed via FTDI utilities to customize VID\/PID, serial number, CBUS pin functions, and I\/O drive strength. USB battery charging detection can signal a connected charger to deliver higher current for faster device charging.","pin_description":"\n
      Pin<\/th>Name<\/th>Function<\/th><\/tr>\n
      1<\/td>TXD<\/td>UART Transmit Output<\/td><\/tr>\n
      2<\/td>VCC<\/td>3.3V Power Input\/Output<\/td><\/tr>\n
      3<\/td>CBUS2<\/td>Configurable CBUS Pin<\/td><\/tr>\n
      4<\/td>CBUS1<\/td>Configurable CBUS Pin<\/td><\/tr>\n
      5<\/td>CBUS0<\/td>Configurable CBUS Pin<\/td><\/tr>\n
      6<\/td>VDD<\/td>1.8V Internal LDO Output<\/td><\/tr>\n
      7<\/td>DM<\/td>USB Data Negative<\/td><\/tr>\n
      8<\/td>DP<\/td>USB Data Positive<\/td><\/tr>\n
      9<\/td>GND<\/td>Ground<\/td><\/tr>\n
      10<\/td>RXD<\/td>UART Receive Input<\/td><\/tr>\n
      11<\/td>RTS#<\/td>Request to Send Output<\/td><\/tr>\n
      12<\/td>CTS#<\/td>Clear to Send Input<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • USB-to-serial adapters: Create compact USB-to-UART cables and dongles for connecting legacy serial devices to modern PCs<\/li>\n
      • Embedded debug: Provide a USB-based debug console and firmware download port for MCU-based products<\/li>\n
      • IoT firmware updates: Enable field firmware updates via USB on IoT devices with 1.8V~3.3V MCU interfaces<\/li>\n
      • Wireless module config: Program and configure BLE, Wi-Fi, and LoRa modules through the USB-UART bridge<\/li>\n
      • Data logging: Transfer measurement data from portable instruments to a PC for analysis via USB virtual COM port<\/li>\n<\/ul>","alternative_models":"\n
        Model<\/th>Brand<\/th>Baud Rate<\/th>Package<\/th>Key Difference<\/th><\/tr>\n
        FT232RQ<\/td>FTDI<\/td>3Mbaud<\/td>QFN-32<\/td>More I\/O, larger package<\/td><\/tr>\n
        CP2102N-A02-GQFN24<\/td>Silicon Labs<\/td>2Mbaud<\/td>QFN-24<\/td>Integrated EEPROM, 2Mbaud<\/td><\/tr>\n
        CH340N<\/td>WCH<\/td>2Mbaud<\/td>SOP-8<\/td>Low cost, 2Mbaud<\/td><\/tr>\n
        MCP2200-I\/SN<\/td>Microchip<\/td>1Mbaud<\/td>SOIC-20<\/td>8 GPIO pins<\/td><\/tr>\n
        FT230XQ-R<\/td>FTDI<\/td>3Mbaud<\/td>QFN-16<\/td>4 GPIO, slightly larger<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8555","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=8555"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8555\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8555"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8555"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8555"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}