FT232RQ-REEL - USB to UART Bridge, 32-QFN (5x5) | FTDI
N.º da peça: FT232RQ-REEL ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $5.4 | $5,40 |
| 10 | $4.95 | $49,50 |
| 100 | $4.32 | $432,00 |
| 500 | $3.78 | $1.890,00 |
| 1.000 | $3.4 | $3.400,00 |
FT232RQ-REEL Visão geral
A USB-to-UART bridge (also called a USB-serial converter or USB CDC virtual COM port controller) is a class of interface IC that translates USB packets into asynchronous serial frames so legacy RS-232/RS-485/RS-422 peripherals can connect to a modern host that has dropped legacy ports. Within the broader hierarchy, it sits under Interface ICs > USB Bridges > Serial Interface ICs > Communication Semiconductors, and is one of the most common ways to add a virtual COM port to embedded designs, industrial equipment, and test instruments.
Key features of the FT232RQ-REEL include integrated 3.3 V LDO regulator output for system rails, configurable CBUS I/O pins, low operating and USB suspend current, UHCI / OHCI / EHCI host controller compatibility, USB 2.0 Full Speed compliance, and a -40 °C to +85 °C extended operating temperature range. It supports FIFO, FT245-style synchronous FIFO, async bit-bang, sync bit-bang, MPSSE, and FT1248 modes through its driver-controlled multiprotocol engine, and it enumerates as a standard USB CDC device so most operating systems load a built-in VCP driver.
Architecturally, the FT232RQ-REEL combines a USB 2.0 physical layer (PHY), a serial interface engine (SIE), a 1 kB buffer, an internal clock generator, and a UART core with modem-control signals. The 32-pin QFN with exposed pad provides a thermal pad connection and small footprint, enabling compact dongle and embedded designs. The part is supplied on a 3,000-piece tape and reel reel as the -REEL ordering suffix indicates.
Typical applications include USB-to-RS232 converter cables and dongles, microcontroller debug console ports, industrial PLC programming ports, point-of-sale (POS) terminals, and USB instrument control for test and measurement gear. The wide 3.3 V to 5.25 V supply range lets it interface with both 3.3 V MCUs and legacy 5 V logic.
When designing with this part, observe the USB-IF signal-integrity layout guidelines: route the USB D+/D- pair as a 90 Ω differential, keep the 12 MHz crystal traces short, and provide a solid ground reference under the QFN exposed pad. Note that the FT232RQ has moved to NRND/EOL per FTDI product page; for new designs the pin-compatible FT232RNQ is recommended as the drop-in successor.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes that supplement the FTDI datasheet, helping engineers select, source, and integrate the FT232RQ-REEL with full confidence in its parameters, alternatives, and lifecycle status.
Alternativas drop-in para FT232RQ-REEL — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com FT232RQ-REEL (mesmo formato e footprint) — diferindo em Function, Operating Temperature, Package, RoHS Status, Supply Voltage.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
FT232RNQ-REEL
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
FT232RQ
✅ Drop-In✓ Em estoque
$2.4 / unidade
Ver ficha técnica →FT232RQ-REEL Especificações
| Função | USB to UART serial data transfer interface bridge |
| USB Compliance | USB 2.0 Full Speed (12 Mbps) |
| Tensão de alimentação | 3.3 V to 5.25 V (single supply) |
| UART Data Rate | Up to 3 Mbaud |
| Encapsulamento | QFN-32 (5x5 mm) with exposed pad |
| Temperatura de operação | -40 °C to +85 °C |
| On-chip LDO Output | 3.3 V (for external rail) |
| Modem Control Lines | RTS, CTS, DTR, DSR, DCD, RI, TXD, RXD |
| Clock Source | Internal 12 MHz + PLL (no external crystal required) |
| Suspend Current | Low USB suspend current |
| Host Compatibility | UHCI / OHCI / EHCI host controllers |
| Operating Modes | UART, FIFO, Bit-Bang, MPSSE, FT1248 |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant (Pb-free 32-QFN package) |
Configuração de pinos do FT232RQ-REEL
| Pino 1 | VCC — 3.3 V LDO output / power supply decoupling |
| Pino 2 | GND — Ground reference |
| Pino 3 | USBDP — USB D+ data line |
| Pino 4 | USBDN — USB D- data line |
| Pino 5 | GND — Ground reference |
| Pino 6 | OSCIN — 12 MHz crystal input (internal on R-series) |
| Pino 7 | OSCOUT — 12 MHz crystal output (internal on R-series) |
| Pino 8 | TEST — Test pin - tie to GND per datasheet |
| Pino 9 | RESET — External reset input (active low) |
| Pino 10 | CBUS0 — Configurable CBUS I/O pin 0 |
| Pino 11 | CBUS1 — Configurable CBUS I/O pin 1 |
| Pino 12 | CBUS2 — Configurable CBUS I/O pin 2 |
| Pino 13 | CBUS3 — Configurable CBUS I/O pin 3 |
| Pino 14 | CBUS4 — Configurable CBUS I/O pin 4 |
| Pino 15 | TXD — UART transmit data output |
| Pino 16 | RXD — UART receive data input |
| Pino 17 | RTS — Request to send (modem control, output) |
| Pino 18 | CTS — Clear to send (modem control, input) |
| Pino 19 | DTR — Data terminal ready (modem control, output) |
| Pino 20 | DSR — Data set ready (modem control, input) |
| Pino 21 | DCD — Data carrier detect (modem control, input) |
| Pino 22 | RI — Ring indicator (modem control, input) |
| Pino 23 | VCCIO — I/O supply voltage (3.3 V or 5 V) |
| Pino 24 | AVCC — Analog supply for internal PLL |
| Pino 25 | AGND — Analog ground for PLL |
| Pino 26 | NC — Not connected (per datasheet) |
| Pino 27 | NC — Not connected (per datasheet) |
| Pino 28 | NC — Not connected (per datasheet) |
| Pino 29 | GND — Ground reference |
| Pino 30 | VCC — 3.3 V LDO output / power supply decoupling |
| Pino 31 | GND — Ground reference |
| Pino 32 | EP — Exposed thermal pad - tie to GND for thermal dissipation |
Aplicações típicas
FT232RQ-REEL é adequado para 6 aplicaçãos: USB to RS-232 Converter Cable / Dongle, Microcontroller Debug Console Port, Industrial PLC Programming Port, USB Instrument Control for Test and Measurement, Point-of-Sale (POS) Terminal Connectivity, Embedded Linux Board Serial Console.
USB to RS-232 Converter Cable / Dongle
The FT232RQ-REEL is the canonical bridge IC for USB-to-RS-232 converter cables that present a virtual COM port on a PC. Its 3.3 V to 5.25 V single-supply operation, integrated 3.3 V LDO, and full modem-control line set (RTS/CTS/DTR/DSR/DCD/RI) match the legacy DB-9 pinout without external level shifters. Up to 3 Mbaud UART data rate supports legacy serial peripherals, legacy industrial equipment, and console ports. The 32-QFN 5x5 mm footprint fits inside a dongle housing, and FTDI's mature WHQL-signed VCP driver ensures plug-and-play on Windows, macOS, and Linux.
Recomendado
Microcontroller Debug Console Port
The FT232RQ-REEL provides a USB CDC virtual COM port to embedded development boards for serial console logging, firmware debugging, and printf-style diagnostics. The integrated 12 MHz oscillator and on-chip USB 2.0 Full Speed PHY eliminate external clock and PHY components, while the 3.3 V LDO can power a small MCU rail directly. 3 Mbaud UART headroom exceeds typical 115,200 baud debug rates, and the FTDI VCP driver is pre-installed on most modern operating systems so engineers see a COM port appear with zero driver installation.
Recomendado
Industrial PLC Programming Port
The FT232RQ-REEL enables factory-floor PLCs, motor drives, and HMIs to expose a USB programming port for technicians using laptops that no longer have legacy RS-232 ports. The -40 °C to +85 °C extended industrial temperature range, robust USB 2.0 Full Speed compliance, and full hardware flow control lines match the rugged requirements of industrial environments. The QFN-32 5x5 mm footprint drops directly onto PLC controller boards, and FTDI's longevity of supply and stable driver ecosystem are major advantages for long-life industrial equipment.
Recomendado
USB Instrument Control for Test and Measurement
The FT232RQ-REEL provides a SCPI-style command interface to USB-controlled bench instruments such as programmable power supplies, signal generators, and data acquisition modules. Its MPSSE mode allows SPI, I2C, and JTAG bit-banging for instrument calibration and firmware updates, while the standard UART mode handles command streams up to 3 Mbaud. The integrated clock generator eliminates external crystal cost, and the 32-QFN small footprint is ideal for compact benchtop instruments and USB probes where PCB area is at a premium.
Recomendado
Point-of-Sale (POS) Terminal Connectivity
The FT232RQ-REEL bridges USB to UART for POS peripherals including barcode scanners, receipt printers, customer displays, and EFT/PIN pads. The hardware flow control (RTS/CTS) handles credit-card terminal data streams without software overhead, while the low USB suspend current extends battery life in mobile POS tablets. The 3.3 V to 5.25 V supply flexibility matches both battery-powered mobile POS tablets and mains-powered countertop terminals, and the FTDI driver supports all major POS operating systems including Windows Embedded, Android, and Linux.
Recomendado
Embedded Linux Board Serial Console
The FT232RQ-REEL serves as a USB-to-serial debug console for Raspberry Pi companion boards, BeagleBone capes, and custom Linux SBCs that lack built-in UART-to-USB. The FTDI VCP driver is bundled with the Linux kernel (cp210x and ftdi_sio modules), so the COM port appears in /dev/ttyUSB0 without any userland driver installation. 3 Mbaud UART rate supports high-speed kernel debug logs and fast file transfers via ZMODEM or kermit, while the 5x5 mm QFN-32 footprint suits even the smallest embedded Linux carrier boards.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para FT232RQ-REEL — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | FT232RNQ-REEL | FT232RQ |
|---|---|---|---|
| Package | QFN-32 (5x5 mm) | QFN-32 (5x5 mm) - same | QFN-32 (5x5 mm) - same |
| Brand | FTDI | FTDI | FTDI |
| Function | USB to UART bridge | USB to UART bridge | USB to UART bridge |
| USB Compliance | USB 2.0 Full Speed | USB 2.0 Full Speed | USB 2.0 Full Speed |
| Supply Voltage | 3.3 V to 5.25 V | 3.3 V to 5.25 V | 3.3 V to 5.25 V |
| UART Data Rate | Up to 3 Mbaud | Up to 3 Mbaud | Up to 3 Mbaud |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Lifecycle | NRND | Active (recommended for new designs) | NRND |
| Packaging | Tape & Reel (-REEL) | Tape & Reel (-REEL) | Tray (no -REEL suffix) |
Principais diferenciais
- FTDI WHQL-signed VCP driver with broadest OS support (vs WCH CH340)
- Integrated 3.3 V LDO regulator output (vs Silicon Labs CP2102N)
- MPSSE and FT1248 multiprotocol engine included (vs Generic UART-only bridges)
Notas de projeto
The USB D+/D- pair (USBDP/USBDN) must be routed as a 90 Ω differential pair with controlled impedance per USB 2.0 specification. Keep traces short, length-matched, and routed over a continuous ground plane. Place the FT232RQ-REEL 3.3 V LDO decoupling capacitors (typically 100 nF ceramic + 4.7 µF bulk) as close as possible to the VCC pins. The exposed pad (EP) must be soldered to a continuous ground plane for both thermal dissipation and electrical reference.
Do not confuse FT232RQ (QFN-32 5x5 mm package) with FT232RL (SSOP-28 package) - they share silicon but the pinouts differ, so PCB footprints are not interchangeable. The CBUS pins default to specific functions on power-up but are reconfigurable via FTDI's FT_Prog utility; verify the CBUS settings in your schematic match the desired function. For new designs, prefer the FT232RNQ-REEL as the pin-compatible drop-in successor since the FT232RQ has moved to NRND.
Although the FT232RQ integrates a 12 MHz crystal and PLL, decoupling on AVCC and AGND remains important for clean USB signaling. Place a ferrite bead or 10 Ω resistor between VBUS (USB connector VCC) and the FT232RQ VCC pin to suppress USB bus noise. If using the CBUS pins as outputs, ensure the chosen CBUS drive strength matches the load - the CBUS pins are not designed to drive high-current loads directly.
Informações de conformidade
Pb-free 32-QFN package per FTDI product page; RoHS compliant; not AEC-Q100 qualified (consumer/industrial grade only).
