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FT232RL

USB-UART bridge IC, 12Mbps, 3Mbaud, 1024-bit EEPROM, integrated clock, SSOP-28

6700

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جزء الشركة المصنعة ： جزء الشركة المصنعة

FT232RL

الحزمة ： الحزمة

SSOP-28 (10.2 x 5.3 x 1.75 mm)

الوصف

نظرة عامة على المنتج

The FT232RL from FTDI Chip is a USB to serial UART interface IC in a 28-pin SSOP package. It handles the entire USB protocol on-chip with no USB firmware programming required, supporting data rates from 300 baud to 3 Mbaud, integrated EEPROM, and multiple interface modes including UART, bit-bang, and FIFO.

المواصفات الرئيسية

USB Standard	USB 2.0 Full Speed (12 Mbps)
UART Data Rate	300 baud to 3 Mbaud (TTL)
TX Buffer Size	256 bytes
RX Buffer Size	128 bytes
Internal EEPROM	1024 bits (VID, PID, serial, strings)
جهد الإمداد	3.3 V to 5.25 V (single supply)
CBUS I/O Pins	4 (configurable)
I/O Voltage	1.8 V to 5 V (via VCCIO)
درجة حرارة التشغيل	-40 درجة مئوية إلى +85 درجة مئوية

الميزات

Entire USB protocol handled on-chip, no firmware programming
Integrated 1024-bit EEPROM for device descriptors and CBUS configuration
Integrated USB termination resistors and clock generation
Configurable CBUS I/O pins (TXLED, RXLED, TXDEN, PWREN, SLEEP)
Synchronous and asynchronous bit-bang interface options
UART with 7/8 data bits, 1/2 stop bits, and full parity options
Integrated level converter for 1.8 V to 5 V logic interfacing
FTDIChip-ID unique security dongle feature
48/24/12/6 MHz clock output options

التطبيقات

USB to RS232/RS422/RS485 converters
Legacy peripheral USB upgrade
MCU/FPGA programming and debug interfaces
USB instrumentation and industrial control

مقدمة المنتج:FT232RL مقدمة المنتج

The FT232RL from FTDI Chip is one of the most widely-used USB to serial UART interface ICs in the embedded industry, offering a complete single-chip solution for adding USB connectivity to UART-based systems. The device handles the entire USB protocol on-chip, including enumeration, data transfer, and suspend/resume, eliminating the need for USB firmware development. It integrates a 1024-bit EEPROM for storing USB Vendor ID (VID), Product ID (PID), serial number, product description strings, and CBUS pin configuration, all programmable in-circuit over USB using the FTDI MPROG utility. The UART supports data rates from 300 baud to 3 Mbaud with 256-byte transmit and 128-byte receive buffers that use smoothing technology for high throughput. The VCCIO pin allows the UART and CBUS I/O voltages to be set independently from 1.8 V to 5 V, enabling direct interfacing with a wide range of logic families. Beyond basic UART mode, the FT232RL supports synchronous and asynchronous bit-bang modes for direct I/O control, and a CBUS bit-bang mode for simple digital I/O without UART involvement.

مبدأ العمل:FT232RL مبدأ العمل

The FT232RL operates through five functional blocks: (1) The USB transceiver and SIE (Serial Interface Engine) handle all USB 2.0 full-speed physical layer and protocol layer operations, including NRZI encoding/decoding, CRC generation/checking, and packet formatting. Integrated 1.5 kOhm pull-up on D+ signals full-speed capability. (2) The USB protocol processor manages device enumeration, endpoint configuration, and data transfer between the USB host and the internal buffers. It implements both CDC (Virtual COM Port) and D2XX (direct driver) data paths. (3) The UART engine converts between parallel buffer data and serial UART format with programmable baud rate, data format, and flow control (hardware RTS/CTS or software XON/XOFF). The baud rate is generated from the internal clock with fine resolution. (4) The EEPROM controller reads the 1024-bit configuration EEPROM at power-up to load device descriptors and CBUS settings. The EEPROM can be reprogrammed over USB at any time. (5) The level converter adjusts the UART and CBUS I/O voltages based on the VCCIO pin, enabling 1.8 V to 5 V logic compatibility regardless of the core VCC supply.

وصف الدبوس:FT232RL تعريف الدبوس ووظائفه

رقم الدبوس.	اسم الدبوس	الوظيفة
1	TXD	UART transmit data output
2	DTR#	Data terminal ready (output)
3	RTS#	Request to send (output)
4	VCCIO	I/O voltage reference (1.8-5 V)
5	RXD	UART receive data input
6-10	Mixed	RI#, DCD#, DSR#, CTS#, CBUS0-4
15	USBDP	USB D+ (with integrated 1.5k pull-up)
16	USBDM	USB D-
17	3V3OUT	3.3 V LDO output (50 mA max)
20	VCC	Core supply (4.0-5.25 V)

Application Scenarios:In which products and applications isFT232RL مستعمل

USB-to-RS232 converter cables and dongles where the integrated USB resistors, clock, and EEPROM eliminate all external active components for a minimal BOM design
MCU and FPGA programming interfaces where the 3 Mbaud UART and bit-bang modes support high-speed firmware download and JTAG-like debug communication
USB instrumentation and industrial control using the D2XX direct driver for low-latency, high-throughput data acquisition with 256-byte TX and 128-byte RX buffers
Security dongle applications leveraging the unique FTDIChip-ID burned into each device during manufacture for software copy protection

Alternative Models:What chips are recommended as replacements for FT232RL

الطراز	العلامة التجارية	Max Baud	EEPROM	الحزمة
FT232RQ	FTDI	3 Mbaud	1024 bit	QFN-32
MCP2200-I/SO	الرقاقة الدقيقة	1 Mbaud	256 bytes	SOIC-20
CP2102N-A02-GQFN24	مختبرات السيليكون	2 Mbaud	576 bytes	QFN-24
CH340G	WCH	2 Mbaud	-	SOIC-16
CH9350	WCH	1 Mbaud	-	SSOP-20