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FT232RQ-REEL

USB to UART Bridge IC, 3MBaud, integrated EEPROM/clock, QFN-32

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Manufacturer Part：

FT232RQ-REEL

Package：

QFN-32 (5.0 x 5.0 x 0.9 mm)

Brand：
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Description

Product Overview

The FT232RQ-REEL from FTDI Chip is a USB to serial UART bridge interface IC in a QFN-32 package. It integrates an entire USB protocol engine, EEPROM, clock generation circuitry, and USB termination resistors in a single chip. The device supports data transfer rates up to 3MBaud with 256-byte TX and 128-byte RX FIFO buffers, and provides multi-protocol serial interface options including RS232, RS422, and RS485.

Key Specifications

USB Standard USB 2.0 Full Speed (12Mbps)
Max Data Rate 3MBaud
TX FIFO 256 bytes
RX FIFO 128 bytes
IO Voltage 1.8V to 5.25V
Supply Current 15mA typical
Suspend Current 70uA typical
CBUS Pins 5 configurable I/O
Operating Temperature -40C to +85C
Package QFN-32 (5x5mm)
Status EOL (replaced by FT232RNQ)

Features

  • Single-chip USB to UART bridge solution
  • Integrated EEPROM for USB VID/PID/serial number
  • Integrated USB termination resistors
  • Integrated clock generation (no external crystal needed)
  • Multi-protocol support (RS232, RS422, RS485, TTL)
  • 5 configurable CBUS pins for status and control
  • Adjustable IO voltage from 1.8V to 5.25V
  • Supports bus-powered and self-powered configurations
  • FIFO receive and transmit buffers for smooth data flow

Applications

  • USB to RS232/RS485/RS422 adapter cables
  • Embedded system debug and programming interfaces
  • Industrial equipment USB connectivity
  • Legacy serial device USB upgrade
  • Arduino and maker board USB interface

The FT232RQ-REEL from FTDI Chip is a complete USB to serial UART bridge interface in a compact QFN-32 package. It integrates all necessary USB functionality including protocol handling, EEPROM for configuration storage, clock generation, and USB termination resistors, requiring no external components beyond a bypass capacitor. Supporting data rates up to 3MBaud with 256/128-byte TX/RX FIFOs, it provides reliable USB connectivity for embedded systems. The device supports multi-protocol serial communication including RS232, RS422, and RS485 through external transceivers. Note: this device is EOL and being replaced by the FT232RNQ.

The FT232RQ-REEL functions as a bridge between the USB bus and a UART serial port. On the USB side, the internal USB protocol engine handles enumeration, data packet formatting, and all USB 2.0 Full Speed protocol requirements. The integrated EEPROM stores USB descriptors including VID, PID, and serial number. On the UART side, data from the USB host is written to the TX FIFO buffer and transmitted serially at the configured baud rate. Incoming serial data is captured into the RX FIFO and sent to the USB host. The 5 CBUS pins can be configured for various functions including TX/RX LED indicators, power enable, and wake-up signals. The adjustable VCCIO pin sets the IO voltage independently from the USB supply.

Pin Name Type Function
1 VCC Power 3.3V internal regulator output (bypass only)
2 3V3OUT Power 3.3V regulated output
3 USBDP I/O USB data positive (D+)
4 USBDM I/O USB data negative (D-)
5 GND Power Ground
6 RESET Control Reset (active low, internal pull-up)
7 VCCIO Power IO voltage reference (1.8-5.25V)
8 TXD Output UART transmit data
9 RXD Input UART receive data
10 RTS Output Request to send (active low)
11 CTS Input Clear to send (active low)
12 DTR Output Data terminal ready (active low)
13 DSR Input Data set ready (active low)
14 DCD Input Data carrier detect (active low)
15 RI Input Ring indicator (active low)
16-20 CBUS0-4 I/O Configurable I/O pins
21 EECS Control EEPROM chip select
22 EECLK Control EEPROM clock
23 EEDATA I/O EEPROM data
24 TEST Test Test pin (connect to GND)
25-28 VDD/GND Power Supply and ground
  • USB to RS232/RS485 serial adapter cables and dongles
  • Embedded MCU debug and programming interfaces
  • Industrial equipment USB communication ports
  • Legacy serial device USB connectivity upgrade
  • Maker and development board USB serial interface
Manufacturer Part Number Package Notes
FTDI FT232RNQ QFN-32 Direct replacement (RoHS compliant)
FTDI FT232RL SSOP-28 Through-hole friendly version
Silicon Labs CP2102N-A02-GQFN24 QFN-24 Smaller footprint USB-UART bridge
WCH CH340G SOP-16 Low-cost USB-UART alternative
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In stock:
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Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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