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FT231XS-R - USB to Full UART Bridge IC, SSOP-20 | FTDI
The FTDI FT231XS-R is a USB-to-full-handshake-UART bridge IC that integrates a USB 2.0 Full Speed (12 Mbps) controller, on-chip USB transceiver, clock generation (no external crystal required), and full modem control lines (RTS/CTS, DTR/DSR, DCD, RI) into a single 20-pin SSOP package. It operates from a 4.5V to 5.25V internal LDO supply (VBUS tied to +5V from USB) and supports UART baud rates from 300 baud to 3 Mbaud. The -R suffix denotes tape-and-reel packaging for high-volume assembly. A USB-to-UART bridge IC is a class of interface device that converts USB signaling into a serial (asynchronous) UART protocol so that microcontrollers, microprocessors, and legacy serial peripherals can communicate with a host PC without an external MCU. Bridges belong to the broader category of USB interface ICs > interface ICs > integrated circuits, and the FT231X family specifically sits in the FT-X series second generation, succeeding the older FT232R. The FT231X family adds integrated MTP memory for user-configurable descriptor fields and is offered in three variants by feature set: FT230X (basic UART, fewer lines), FT231X (full modem UART, more GPIOs), and FT234X (TX/RX only). Key features of the FT231XS-R include full hardware handshake support (RTS, CTS, DTR, DSR, DCD, RI), four GPIO pins multiplexed with modem-control functions, an integrated 1024-byte EEPROM (MTP, user-configurable for VID/PID/product string/serial number), a wide operating temperature range of -40C to +85C industrial grade, and low-power suspend current of approximately 125 uA when the USB host is in suspend mode. The chip is RoHS compliant and ships in a small SSOP-20 footprint that drops onto the same PCB land pattern used by the FT232R (SSOP-28 is the larger legacy). The device is supported by FTDI's royalty-free VCP (Virtual COM Port) and D2XX direct-driver libraries, allowing seamless integration with Windows, macOS, Linux, and Android. Architecturally, the FT231XS-R uses an internal 48 MHz oscillator with on-chip PLL to derive the USB 12 MHz clock and the UART baud-rate generator, eliminating the external crystal that older USB-to-UART bridges required. The USB protocol stack is handled entirely in hardware/firmware on the chip, so no host-side USB stack or external MCU intervention is needed for basic UART pass-through. The integrated MTP memory (reprogrammable via USB from the host PC using FTDI's FT_PROG utility) lets OEMs customize VID/PID and descriptor strings without external EEPROM. Typical applications include industrial RS-232 / RS-485 dongles, debug and console ports on development boards, point-of-sale (POS) terminals, microcontroller-to-PC debug bridges, USB instrumentation probes, embedded firmware-flashing fixtures, and any design that needs a reliable, driver-supported USB-to-serial port with full modem-control signals. Its small SSOP-20 footprint and absence of an external crystal make it a strong choice for compact, low-BOM-count boards. When designing with the FT231X, ensure the USB D+/D- pair is routed as a 90 ohm differential trace and the VBUS pin is connected to +5V (or to a 3.3V rail for the FT231XQ variant). For designs migrating from the FT232R, note that the FT231X uses SSOP-20 (smaller than SSOP-28) so the PCB footprint must be redesigned, and the FT232R's external EEPROM is replaced by on-chip MTP memory. This page synthesizes distributor pricing, verified drop-in alternatives (FT231XQ-R for 3.3V operation and the FT230X family for reduced GPIO), and practical PCB layout notes not consolidated in the manufacturer datasheet.
FT232BL - USB UART IC, USB 2.0 Full-Speed, LQFP-32 | FTDI
The FTDI FT232BL is a 2nd-generation USB-to-UART interface IC that converts between USB and asynchronous serial data formats, housed in a 32-pin LQFP (7x7 mm) package. It supports USB 2.0 full-speed (12 Mbps) signaling, integrates a 3.3V LDO regulator, and provides a complete UART modem interface with hardware flow control (RTS/CTS/DTR/DSR/DCD/RI). The FT232BL operates from a single 4.35V to 5.25V supply, consumes approximately 25 mA typical operating current, and is USB-IF certified for seamless plug-and-play on Windows, macOS, Linux, and embedded operating systems. An external 93C46/93C56/93C66 EEPROM can be attached to customize USB VID/PID, product strings, and power descriptor fields. According to the FTDI datasheet (DS_FT232BL_BQ.pdf), the device supports UART data rates from 300 baud up to 3 Mbaud with 7 or 8 data bits and configurable parity. The internal clock is derived from a 6 MHz external crystal multiplied to 48 MHz via the on-chip PLL. The FT232BL is the LQFP-32 variant of the FT232B family, while the FT232BQ ships in a 32-pin QFN (5x5 mm) package. Compared to the later FT232R generation, the FT232BL requires an external crystal and external EEPROM, which adds BOM cost but offers more flexible oscillator tuning. The FT232BL also provides CBUS pins (CBUS0-CBUS5) that can be configured via EEPROM for functions such as PWREN#, SLEEP#, TXLED#, RXLED#, and clock outputs. This pin set makes the FT232BL a drop-in workhorse for microcontroller development boards, industrial USB-to-serial converters, programmer/debugger interfaces, and point-of-sale terminals. The integrated 3.3V LDO (pin 6) can supply up to 50 mA to external logic, eliminating the need for an external regulator in 3.3V MCU designs. Engineers should note that the FT232BL has been designated NRND (Not Recommended for New Designs) in favor of the FT232R/FT232H/FT-X series, but remains widely available through distribution channels for legacy designs. A USB UART bridge is a class of interface IC that handles the USB protocol stack on one side and presents a classical asynchronous serial (UART) interface on the other. It belongs to the broader USB-to-peripheral bridge category, sitting between USB controllers and simpler serial devices. USB UART bridges are essential when a host MCU or legacy equipment lacks native USB but needs to exchange bytes with a PC. In the component taxonomy, the FT232BL is an Interface IC > USB Bridge > USB-to-UART converter. Key features of the FT232BL include a 3 Mbaud maximum UART baud rate, integrated 3.3V LDO, full USB 2.0 full-speed compliance, six CBUS-configurable pins, hardware flow control on modem signals, and optional external 93C46/93C56/93C66 EEPROM support. The device integrates a clock multiplier PLL, eliminating the need for an external 48 MHz source. USB suspend and resume are handled in hardware, drawing less than 500 uA suspend current for battery-powered designs. The FT232BL architecture consists of an 8051-compatible USB protocol engine, FIFO controllers, UART engine, and a parallel CBUS configuration block. The 8051 core executes FTDI's firmware from internal ROM, which is why the part requires no external flash. Data flows from USB endpoint buffers through 384-byte TX and 128-byte RX FIFOs into the UART block. The 6 MHz external crystal is multiplied internally by an 8x PLL to generate 48 MHz for the USB block. Typical applications include microcontroller-to-PC serial bridges (Arduino-compatible boards, STM32 Nucleo, ESP32 debug logs), industrial RS-232/RS-422 adapters, USB programmer/debugger interfaces (JTAG/SPI bridges), barcode scanner interfaces, GPS module USB dongles, and legacy equipment modernization. The wide OS driver support makes the FT232BL a low-risk choice for cross-platform products. When designing, observe USB-IF signal-integrity guidelines: keep the D+/D- traces 90 ohm differential, length-matched within 2 mm, and route over a continuous ground plane. Add a ferrite bead on VBUS if the design is bus-powered and may be hot-plugged. This page synthesizes distributor pricing, drop-in and migration alternatives, and practical design notes not collected in the manufacturer datasheet alone, supporting faster sourcing decisions for engineers.
FT232HL - Hi-Speed USB to UART/FIFO Bridge, LQFP-48 | FTDI
The FTDI FT232HL is a single-channel Hi-Speed USB 2.0 (480 Mb/s) to multipurpose UART/FIFO bridge IC housed in a 48-pin LQFP (7x7 mm) package. It integrates USB PHY, protocol engine, and a configurable serial/parallel engine that can be set to UART, FIFO, FT1248, SPI, or I2C. The device is the lead-free, LQFP-packaged variant of the FT232H family and is the canonical USB-to-SPI/I2C bridge for USB-based test, programming, and bit-banging designs. A USB-to-UART/FIFO bridge (or USB bridge IC) is a mixed-signal interface device that translates USB packet transactions on the host side into a parallel or serial peripheral stream on the device side. In the system hierarchy it sits between the USB host controller (an upstream function) and an embedded MCU, FPGA, or sensor (a downstream function). Bridges like the FT232HL eliminate the need for an on-board MCU to handle USB protocol, offloading PHY, framing, and enumeration onto a certified, driver-supported chip. Within the broader taxonomy the FT232HL is: USB bridge -> serial interface IC -> interface IC -> integrated circuit. Key features include USB 2.0 Hi-Speed compliance (480 Mb/s), support for UART (up to 12 Mbaud), FIFO, FT1248, SPI host (up to 30 MHz via MPSSE) and I2C (up to 3.4 MHz) operating modes, an integrated 1.8V LDO, 3.3V I/O tolerance, and embedded 1024-byte EEPROM for VID/PID customization. The MPSSE (Multi-Protocol Synchronous Serial Engine) block lets the host drive SPI, I2C, and JTAG bit-bang streams directly from the USB endpoint, which is the FT232HL's signature use case. Internally the FT232HL uses a 60 MHz internal reference and a hardened USB 2.0 PHY. The same die is offered in QFN-32 (FT232HQ), LQFP-48 (FT232HL), and LQFP-48 (FT232HL-TRAY/REEL). All variants share the same MPSSE performance and feature set; only the pinout, thermal pad, and pin count differ. The -L suffix on FT232H denotes the lead-free LQFP-48 package option. Typical applications include USB-to-UART debug consoles, USB-to-SPI programmers for SPI flash and EEPROM, USB-to-I2C bridge boards, JTAG programming cables, and FPGA configuration loaders. Hobbyist and engineer-friendly boards like the Adafruit FT232H breakout and FTDI C232HM cable are built around this die. The wide driver support across Windows, macOS, and Linux (libFTDI, D2XX, VCP) reduces host-side integration effort. A key design consideration is the 480 Mb/s USB 2.0 Hi-Speed signaling: route the D+/D- pair as a 90-ohm differential, keep them length-matched, and place the 27-ohm series termination close to the FT232HL pins. Provide a solid ground pour under the LQFP thermal pad and tie VBUS through a 10uF bulk plus 100nF decoupling cap. Reset state on power-up is selected by the default EEPROM image; verify VID/PID values before software bring-up.
FT232HL-REEL - Hi-Speed USB to UART/FIFO Bridge | FTDI
The FTDI FT232HL-REEL is a single-channel Hi-Speed USB 2.0 (480 Mb/s) to multipurpose UART/FIFO bridge IC housed in a 48-pin LQFP (7x7 mm) package. It integrates USB protocol handling, a 480 Mb/s UTMI transceiver, and a configurable serial/parallel engine that can be switched between asynchronous UART (up to 12 Mbaud), FIFO-style asynchronous parallel, the FT1248 synchronous half-duplex bus (1/2/4/8 data lines, up to 30 Mbytes/s), plus MPSSE engines for SPI, I2C, and JTAG. Supply operates from 2.97 V to 3.63 V with on-chip 3.3 V LDO and 1.8 V core regulation; a separate VPLL rail decouples the 480 MHz PLL. A USB bridge IC is a mixed-signal interface that offloads USB host enumeration, descriptor handling, and frame/packet timing from the application MCU while presenting a simpler peripheral interface (UART, FIFO, SPI, I2C) to the downstream system. Bridges sit in the connectivity hierarchy below USB transceiver PHY and above the system MCU, with FTDI's MPSSE-capable Hi-Speed family occupying the high-throughput, multi-protocol tier between full-speed-only UART bridges (FT232R, CP2102N) and application-specific USB controllers. This positioning makes the FT232H useful for both field upgrades of legacy UART designs and new host-side instrumentation. Key differentiating features include Hi-Speed USB 2.0 at 480 Mb/s, configurable UART/FIFO/SPI/I2C/JTAG/FT1248 modes from a single part, the MPSSE engine that drives SPI master at up to 30 MHz, I2C up to 3.4 MHz, and JTAG, plus battery-charge detect (BC1.2) signaling support and an integrated 12 MHz to 480 MHz PLL with low-jitter output. The device exposes 16 flexible I/O pins in FT1248/fast-optical modes, allowing pin-count/bandwidth trade-offs without an external CPLD. Architecturally, the FT232HL-REEL pairs an internal UTMI Hi-Speed transceiver with a 480 MHz PLL and a proprietary protocol multiplexer. Compared to full-speed USB-to-UART parts, the FT232H's Hi-Speed pipe removes the 12 Mbaud practical ceiling and enables bulk streaming, while the multi-protocol mux replaces what would otherwise require several discrete bridges plus a USB hub. Typical applications include USB-to-UART debug bridges for microcontrollers, USB-to-JTAG/SPI/I2C programming and debug cables, USB logic analyzers and protocol testers, USB-based industrial instrumentation with field firmware upgrades, and embedded host adapters for legacy RS-232 peripherals. For audio, the fast FIFO and FT1248 modes can pump 24-30 Mbyte/s sustained, suitable for streaming 8-channel 24-bit audio at 192 kHz into a host. Designers should note that the LQFP-48 footprint requires a Hi-Speed USB layout: 90 ohm differential impedance on DP/DM, common-mode choke or ferrite bead on VBUS, and bulk + ceramic decoupling on VCC and VPLL. For EMI, FTDI's reference designs show series ferrite on VBUS and a common-mode choke near the connector, with the exposed pad (where present on the L package variant) tied to the analog ground pour for thermal dissipation. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical layout/design notes that are not aggregated in the manufacturer datasheet, including head-to-head comparisons versus the FT232HQ-REEL, FT2232HL, and FT600Q.
FT232RL-REEL - USB to UART Bridge IC, SSOP-28 | FTDI
The FTDI FT232RL-REEL is a single-chip USB to asynchronous serial (UART) data transfer interface housed in a 28-pin SSOP (SSOP-28-208mil) package supplied on tape and reel. It integrates the entire USB protocol on-chip, eliminating the need for USB-specific firmware programming, and supports UART data rates from 300 baud up to 3 Mbaud with full hardware handshaking. The device operates from a supply voltage of 3.3 V to 5.25 V (logic-rail tolerant I/O down to 1.8 V) and draws a typical supply current of 25 mA. A USB-to-UART bridge IC is a class of interface controller that translates between the Universal Serial Bus (USB) protocol and asynchronous serial (RS-232-style UART) signaling, allowing legacy microcontrollers and embedded designs to gain a USB connectivity port without writing low-level USB stack code. Within the broader power-management and connectivity taxonomy, the FT232RL belongs to the interface IC family, sitting alongside RS-232/RS-485 transceivers, I2C/SPI bridges, and CAN controllers as a host-side communication protocol converter. Key features include an integrated 3.3 V LDO regulator that powers the internal USB transceiver, an on-chip 12 MHz oscillator with optional external clock input, 1 KB of programmable EEPROM for vendor/product descriptors and CBUS pin configuration, and configurable CBUS pins that can be assigned to functions such as TX/RX LED drivers, clock output, or GPIO. The IC supports USB 2.0 Full Speed (12 Mbps) and provides four modem-control signals (RTS, CTS, DTR, DSR) plus DCD and RI for legacy serial handshaking. The architecture combines a USB Serial Interface Engine (SIE) with a 16-byte transmit buffer and 16-byte receive buffer FIFO, an embedded UART engine, and a flexible CBUS I/O subsystem. This hardware partitioning allows the host MCU to communicate through a standard serial port while the FT232RL handles all USB enumeration, descriptor loading, and bus signaling. Typical applications include microcontroller-to-USB bridges for firmware debug consoles, industrial sensor data loggers, point-of-sale (POS) terminals, USB dongles for wireless modules, and legacy RS-232 equipment modernization. It is also widely embedded inside FPGA development boards and 3D printer controllers as a USB debug/programming port. When designing with the FT232RL, observe the official FTDI hardware design guidelines: provide a 27 ohm series resistor on each USB differential pair, place the 12 MHz crystal within 5 mm of the XIN/XOUT pins with a guard ground ring, and connect VBUS to the 5 V supply through a 10 kohm resistor for bus-powered designs. Failure to follow the reference layout can degrade USB signal integrity and cause enumeration failures. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a single-page engineering reference for selecting, sourcing, and laying out the FT232RL-REEL.
FT232RQ - USB to UART Bridge IC, QFN-32 | FTDI
The FTDI FT232RQ is a single-chip USB to asynchronous serial data transfer interface housed in a 32-pin QFN (5x5 mm) package. It integrates the entire USB protocol on-chip, so no USB-specific firmware programming is required by the host microcontroller, and it enumerates as a standard COM port using FTDI's Virtual COM Port (VCP) driver or as a custom device using the D2XX direct driver. The device operates from a single 3.3 V to 5.25 V supply, supports USB Full Speed (12 Mbps), and offers data rates from 300 baud up to 3 Mbaud in standard mode plus additional clock-relative baud rates. A USB-to-UART bridge is a protocol converter that translates USB signalling into a generic asynchronous serial interface (RS-232-style UART). It sits at the boundary between a USB host and an embedded MCU, sensor, or industrial controller that exposes only UART. Compared to native USB on microcontrollers, a dedicated bridge removes the need for on-chip USB peripherals, crystal matching, or impedance-controlled PCB routing, simplifying hardware design and shortening time-to-prototype. Bridges like the FT232R family belong to the broader category of interface ICs, alongside RS-232/RS-485 transceivers and CAN/LIN controllers. Key features of the FT232RQ include an integrated 3.3 V LDO regulator with external power output, integrated 12 MHz oscillator, integrated power-on-reset circuit, and configurable CBUS I/O pins for status LEDs, TX/RX LEDs, or general-purpose handshaking. It also supports FTDI's Bit-Bang mode, allowing the eight UART/handshake pins to be used as a general-purpose bidirectional parallel I/O port under software control - a popular feature for FPGA configuration, EEPROM programming, and JTAG bridging. The FT232RQ uses a dedicated USB transceiver and serial-parallel engine block; data from the USB endpoint is buffered in a 384-byte transmit and 128-byte receive FIFO and then clocked out by an internal baud-rate generator. The device is USB 2.0 Full Speed compatible and works with UHCI/OHCI/EHCI host controllers. Its low operating and suspend currents make it suitable for bus-powered designs and battery-powered accessories. Typical applications include USB-to-RS232 adapter dongles, microcontroller debug and programming interfaces (Arduino bootloaders, ESP8266/ESP32 firmware flash bridges), industrial instrumentation with USB diagnostics ports, point-of-sale terminals, USB-to-JTAG/SPI bridges via Bit-Bang mode, and embedded debug consoles on FPGAs and DSPs. The wide 3.3 V to 5.25 V supply range covers both 3.3 V and 5 V logic targets. When designing with the FT232RQ, note that this part is in the FTDI product family as an EOL/NRND variant; the active direct replacement is the FT232RNQ in the same QFN-32 package. Add 27 ohm series resistors on USB D+/D- if the datasheet recommendation is required, and place the decoupling capacitors as close as possible to VCC and the internal 3V3OUT pin to keep noise off the analog regulator. This page synthesizes distributor pricing, drop-in QFN-32 alternatives from FTDI's RN family and Infineon's CY7C65213, and practical design notes not collected in the FT232R datasheet alone.
FT232RQ-REEL - USB to UART Bridge, 32-QFN (5x5) | FTDI
The FTDI FT232RQ-REEL is a single-chip USB to asynchronous serial data transfer interface IC integrating a USB 2.0 Full Speed protocol stack with a UART (Universal Asynchronous Receiver/Transmitter) bridge in a 32-pin QFN (5x5 mm) package. It operates from a single 3.3 V to 5.25 V supply, supports data rates up to 3 Mbaud (RS-232 style), and exposes modem-control handshake lines (RTS/CTS, DTR/DSR, DCD, RI) alongside TXD/RXD through its USB-UART bridge. The device requires no external oscillator because the on-chip 12 MHz crystal and PLL generate all required clocks, and the entire USB protocol is handled on-chip. 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.
FT260Q-T - USB 2.0 to I2C/UART Bridge QFN-28 | FTDI
The FTDI FT260Q-T is a HID-class USB 2.0 full-speed (12 Mbps) to I2C/UART interface bridge controller housed in a 28-pin WQFN (5x5 mm) package, operating from a 4.5V to 5.5V supply and rated from -40C for industrial environments. A USB bridge controller is a type of interface IC that sits within the broader connectivity hierarchy of USB hub and bridge controllers in the semiconductor product taxonomy. Its role is to translate between a USB bus on one side and a simpler serial protocol such as I2C or UART on the other, allowing a host PC to communicate with sensors, human interface peripherals, and embedded devices without custom kernel drivers. The defining feature of the FT260 is its USB HID class implementation: because it enumerates as a standard Human Interface Device, it works with the HID class drivers built into Windows, macOS, and Linux, eliminating the need to install vendor-specific drivers. The FT260Q is highly integrated, containing the USB 2.0 full-speed transceiver, an internal LDO regulator that generates the 3.3V reference for the USB transceiver cell, and both an I2C master/slave engine and a UART engine. According to FTDI, the part has been granted USB-IF Test-ID (TID) 40001720, confirming USB 2.0 compliance. FTDI ships the FT260 family in two small 28-pin packages: the FT260Q in WQFN and the FT260S in TSSOP, targeting sensor and human interface peripheral applications such as touch controllers, sensor hubs, battery monitors, and industrial adapters. The -T suffix denotes tray packing (490 pieces per tray); the -R suffix denotes 2500-piece tape and reel. In typical designs, the FT260 connects to an I2C slave device such as an IO expander or sensor through SDA/SCL lines, or to an MCU UART for serial console access. Because power is sourced from the 5V USB VBUS, no external supply is needed in most applications. Designers should note the 4.5V to 5.5V supply constraint: when interfacing with 3.3V or 1.8V I2C devices, level shifting or the internal configuration options in the FT260 programming utilities must be considered. This page synthesizes distributor availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
FT4222HQ-D-R - USB 2.0 to Quad SPI/I2C Bridge | FTDI
The FTDI FT4222HQ-D-R is a Hi-Speed USB 2.0 to Quad-SPI / I2C device controller packaged in a 32-pin VQFN-EP (5x5 mm) and supplied on Tape & Reel. It bridges a USB 2.0 High/Full Speed upstream port to up to four downstream SPI slave devices (configurable as one Quad-SPI or four independent SPI channels) plus an I2C controller capable of up to 53.8 Mbps aggregate throughput. A USB bridge IC is a mixed-signal interface device that converts one serial bus protocol into another so a host CPU can talk to peripherals it cannot address natively. In the FT4222H the USB 2.0 PHY and protocol stack sit on one side, while the downstream side exposes configurable SPI (single/dual/quad mode) and an I2C master/slave controller. This places the part inside the broader hierarchy: USB bridge -> serial interface IC -> interface & connectivity -> mixed-signal semiconductor. Key features include support for multi-voltage I/O (3.3 V, 2.5 V, or 1.8 V VCCIO), an integrated 5 V1 to 3.3 V LDO requiring no external regulator, 128 bytes of OTP memory for vendor information, and an external 12 MHz crystal that feeds the internal PLL. The VQFN-EP package provides a low-thermal-resistance pad that allows sustained USB bus-powered operation without external heatsinking. GPIOs are multiplexed with the SPI data lines, allowing flexible board design. The FT4222H uses a Hi-Speed USB 2.0 PHY with on-chip termination and a serial-interface engine, offloading all protocol handling from the host MCU. Suspend/resume, remote wake-up, and bus-powered operation are handled in hardware, which is why the part is widely used in plug-and-play dongles, LCD/LED display controllers, and industrial sensor hubs. Typical applications include USB-to-SPI display bridges for TFT/OLED panels, USB-to-I2C sensor hubs, industrial USB instrumentation, and evaluation modules for FPGA/CPLD programming. The combination of Quad-SPI throughput and I2C in a single chip is particularly useful when a single USB port must drive both a high-bandwidth display and a cluster of low-speed sensors. When designing with this part, place the 12 MHz crystal within 5 mm of the XIN/XOUT pins and provide a solid ground pour under the exposed pad. Add 100 nF decoupling on each VCCIO rail and 4.7 uF on VBUS. The OTP memory is write-protected after the first programming cycle, so commit vendor data only once. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone FTDI datasheet, giving procurement and engineering teams a single reference for the FT4222HQ-D-R.
FT4222HQ-R - USB 2.0 to Quad SPI/I2C Bridge | FTDI | 32-VQFN
The FTDI FT4222HQ-R is a Hi-Speed USB 2.0 to Quad SPI/I2C device controller housed in a compact 32-pin VQFN package with 5 mm x 5 mm body and 0.5 mm pitch. It supports USB 2.0 High-Speed (480 Mbps) and Full-Speed (12 Mbps) modes and bridges the USB host to SPI (single, dual, quad modes) and I2C peripherals with data rates up to 53.8 Mbps on the SPI side. A USB Bridge IC is a category of interface controller that translates USB transactions into serial protocols such as UART, SPI, I2C, or GPIO so that a host PC or embedded processor can communicate with downstream devices using only USB. The FT4222H family fits the USB-to-SPI/I2C sub-segment of this hierarchy, and within the FTDI portfolio sits alongside the FT232H (USB-to-UART/SPI/FIFO) and FT260 (USB-to-I2C) parts. Key features include multi-voltage I/O support at 3.3 V, 2.5 V, or 1.8 V, four configurable GPIO pins with adjustable drive strength and slew rate, and 128 bytes of one-time-programmable (OTP) memory for storing vendor-specific configuration via the FT_PROG utility. The internal PLL derives all required clocks from an external 12 MHz crystal, so no external clock generator is needed. The FT4222HQ-R uses FTDI's established USB protocol stack, freeing the host from writing low-level USB firmware: the on-chip hardware handles enumeration, descriptors, and bulk/isochronous transfers automatically. The device presents as a vendor-specific USB class, and FTDI provides royalty-free D2XX and LibFT4222 host drivers for Windows, macOS, and Linux. Compared with discrete USB microcontrollers, the FT4222H approach eliminates firmware development, regulatory USB compliance work, and the need for a HID or vendor-class driver on the host side. Typical applications include USB-to-SPI bridges for touch-screen controllers and display panels, USB-to-I2C bridges for EEPROM programming and sensor hubs, USB-controlled GPIO expansion for industrial test fixtures, prototyping interfaces for FPGA configuration flash, and USB DAQ front-ends that stream SPI ADC samples to a host PC at high speed. Designers typically choose the FT4222HQ-R when they need a drop-in, driver-supported USB interface without writing embedded firmware. When designing with the FT4222HQ-R, pay close attention to PCB layout: keep the 12 MHz crystal traces short and symmetric, place the bulk USB VBUS capacitor close to the VCC pin, and provide a solid ground plane beneath the exposed thermal pad to meet USB-IF radiated-emissions requirements. The VIO rail must be sequenced after the 3.3 V core supply to avoid latch-up on the multi-voltage I/O banks; FTDI's reference schematic shows a simple RC delay from VCC to VIO for this purpose. This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes that are not aggregated on a single manufacturer or distributor page.
FT4232HQ-REEL - USB 2.0 HS to Quad UART/MPSSE Bridge | FTDI
The FTDI FT4232HQ-REEL is a USB 2.0 High-Speed (480 Mbps) to quad-channel UART/MPSSE bridge IC housed in a 64-pin QFN (9x9 mm) package. It integrates four independent configurable serial interface channels that can be independently programmed as UART, JTAG, SPI, I2C, or bit-bang parallel interfaces, each backed by FTDI's Multi-Protocol Synchronous Serial Engine (MPSSE) on two of the channels. The device operates from a 3.3 V internal LDO derived from the USB bus 5 V supply (VBUS) and supports IO voltage from 1.8 V to 3.3 V on channel data lines. A USB bridge (also called USB-to-UART or USB-to-serial bridge) is a type of interface IC that converts USB signaling from a host computer into one or more legacy serial protocols such as UART, SPI, I2C, or JTAG. Bridges sit in the hierarchy: USB bridge -> interface IC -> communication controller -> semiconductor. They are essential in modern electronics because most MCUs and FPGAs retain native UART/SPI/I2C peripherals but lack USB device controllers, while virtually every laptop, workstation, and embedded SBC exposes only USB. Key features include hardware flow control on all UART channels, programmable baud rates up to 12 Mbaud, integrated 12 MHz to 480 MHz clock generation from a single 12 MHz crystal, full USB 2.0 Hi-Speed compliance, and a wake-up function on USB activity. The QFN-64 package offers a compact 9x9 mm footprint with an exposed thermal pad for reliable operation across the industrial -40 C to +85 C temperature range. Internally, the FT4232HQ uses a 5th-generation USB protocol engine with on-chip PHY, 4 KB of FIFO per channel, and per-channel configurable MPSSE engines. The architecture enables simultaneous operation of, for example, a JTAG debugger on channel A, an SPI flash programmer on channel B, and two UART debug consoles on channels C and D - a combination that historically required multiple discrete bridge ICs. Typical applications include industrial JTAG/SPI programming stations, multi-port USB-to-serial adapters for test and lab instrumentation, FPGA and MCU development boards, embedded debugging probes (CMSIS-DAP, J-Link equivalents), and point-of-sale terminals. The four-channel density also suits multi-radio debug headers and protocol-aware production testers. When designing with this device, observe USB-IF compliance layout practices: 90-ohm differential impedance on D+/D-, ESD protection near the USB connector, decoupling on VCC and VIO, and a 12 MHz crystal with the load capacitors specified in the FTDI datasheet. This page synthesizes FTDI-published specifications, distributor pricing, true drop-in alternatives in the QFN-64 footprint, and practical design notes not collected in any single source.
FT801Q-R - EVE Embedded Video Engine, 48-VQFN | Bridgetek
The Bridgetek FT801Q-R is an Embedded Video Engine (EVE) graphic controller IC housed in a 48-pin VQFN (7x7 mm) package, supplied on 2500-piece tape-and-reel. It targets embedded Human-Machine Interface (HMI) applications by integrating display, audio, and touch control into a single chip, operating from a 2.97V to 3.63V supply with a 30 MHz internal clock. An EVE (Embedded Video Engine) is a class of graphic controller that offloads display list rendering, widget drawing, and touch sensing from the host microcontroller, freeing the MCU to run application logic. EVE sits in the hierarchy: graphic controller -> display driver IC -> video processing -> power management IC -> semiconductor. FTDI/Bridgetek pioneered this category with the FT800 and extended it through the FT810/FT811/FT812/FT813 family, of which FT801 is the cost-optimized variant. Key features include an object-oriented widget architecture supporting resistive touch sensing, integrated audio output, 1/2/4/8-bit RGB display interface up to HVGA/WQVGA resolution, and configurable host interface (SPI up to 30 MHz or I2C up to 3.4 MHz). The 48-VQFN package exposes all digital I/O, RGB bus, audio PWM, and the MODE pin that selects SPI (pull-down) or I2C (pull-up). Technically, the FT801 builds on the FT800 silicon with an enhanced command set while retaining register-level compatibility. It uses an internal 30 MHz oscillator, generates all timing for the LCD panel, performs JPEG decoding in hardware, and computes touch coordinates internally. Power sequencing is straightforward with single 3.3V rail. Typical applications include home appliances, security system keypads, medical device front panels, teleconferencing interfaces, industrial control HMIs, and smart-home thermostats. The FT801's low host-overhead makes it ideal for any MCU (including 8-bit parts) that needs a modern graphical UI. When designing, keep RGB traces short (under 50 mm) and matched, place a 100 nF decoupling cap within 3 mm of every supply pin, and reserve a footprint for the touch-panel connector. The MODE pin must be biased with a 10 kohm resistor since leaving it floating can cause intermittent SPI/I2C mis-selection. This page synthesizes cross-distributor pricing, drop-in same-package alternatives, and practical layout notes that go beyond the manufacturer datasheet narrative.
FT812Q-T - EVE2 Video Controller IC, SPI, 56-QFN | Bridgetek
The Bridgetek FT812Q-T is a second-generation Embedded Video Engine (EVE2) controller IC integrating graphics, audio, and resistive touch control into a single chip, packaged in a 56-pin VQFN-EP (8x8 mm). It targets high-resolution Human-Machine Interface (HMI) applications, featuring a 24-bit RGB parallel display interface and an SPI host interface operating up to 100 Mbps. An Embedded Video Engine (EVE) is a system-on-chip graphics controller that offloads rendering, widget composition, audio playback, and touch scanning from the host MCU. EVE controllers occupy a unique position in the embedded display hierarchy - sitting between simple character LCDs and full graphics SoCs - delivering high-quality HMIs without requiring a high-performance host processor or external frame buffer memory. Key features of the FT812Q-T include a built-in graphics engine supporting jpeg decoding and ASTC texture compression, a 1 MByte graphics RAM, integrated PWM audio output, and a resistive touch screen controller with hardware scanning. It supports display resolutions up to 1024x768 (HVGA+) via its programmable 24-bit RGB interface, with display sizes configurable up to 512x512 for the FT81x family. The device operates from a single 3.3V supply (2.97V to 3.63V) and is specified for the -40C to +85C industrial temperature range. From an architecture standpoint, the FT812Q-T combines an embedded graphics accelerator, a configurable display controller, audio DAC with class-D amplifier interface, and a touch engine into a single BGA-equivalent VQFN package. The 56-QFN-EP exposed pad provides thermal relief and a low-impedance ground return. Communication occurs through SPI at speeds up to 100 Mbps, allowing the host MCU to issue high-level display-list commands rather than pixel-by-pixel updates, dramatically reducing MCU firmware complexity and SPI bus traffic. Typical applications include point-of-sale terminals, industrial control panels, medical device HMIs, security systems, teleconferencing equipment, smart home control panels, and portable instrumentation displays. The wide operating voltage and temperature ranges suit industrial, medical, and security applications requiring reliable operation in harsh environments. When designing with the FT812Q-T, pay attention to PCB layout: route SPI traces as short 50-ohm impedance-controlled lines, place the 0.1uF decoupling capacitor within 3mm of the supply pin, and solder the exposed pad to a continuous ground plane for thermal dissipation and low-noise digital return paths. The EVE2 command protocol requires the host MCU firmware library from Bridgetek for proper display-list construction. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet - including a 5-alternative comparison matrix from Bridgetek's FT81x family and cross-brand VQFN-56 competitors, plus an honest application-by-application fit analysis.
FUSB251GEVB - USB Type-C CC/SBU Protection Eval Board | onsemi
The onsemi FUSB251GEVB is an evaluation board for the FUSB251 Type-C Configuration Channel (CC) and Sideband Use (SBU) protection integrated circuit, designed to demonstrate and validate USB Type-C circuit protection in real systems. The board is intended to be inserted between a board with a Type-C controller and a voltage source for OVP (over-voltage protection) testing, enabling engineers to evaluate the FUSB251's ability to safeguard downstream USB Type-C ports. What is a USB Type-C protection IC? A Type-C protection IC is a specialized interface device that sits on the Configuration Channel (CC1/CC2) and Sideband Use (SBU1/SBU2) lines of a USB Type-C connector. It protects the host or device SoC from over-voltage events caused by mis-wired cables, faulty sources, or hot-plug transients. These devices belong to the broader category of interface ICs and power management ICs designed for cable-oriented protection. The hierarchy is: protection IC -> interface IC -> semiconductor IC. They are critical in modern USB-PD designs where CC lines carry the PD negotiation signaling at voltages up to 5V and SBU lines carry analog audio or debug signals. The FUSB251GEVB integrates power input flexibility by accepting VBUS from a micro-USB connector (J3) or external supply, generating V3P3 through an onboard regulator (U3) and providing VDD to the FUSB251 device under test. This allows standalone bench characterization without requiring a fully functional Type-C source. The board exposes test points for monitoring CC and SBU line states before and after protection, enabling engineers to characterize the OVP response time, leakage current, and recovery behavior. Typical applications include evaluation of USB Type-C port protection for smartphones, tablets, laptops, docking stations, USB-PD chargers, and any USB Type-C interface that must survive accidental VBUS shorts to CC or SBU pins. The FUSB251 specifically addresses the 20V OVP tolerance required for USB-PD 3.0 sources that can negotiate voltages up to 20V on VBUS. Engineers use this eval board to validate system-level robustness before committing to a PCB layout. When designing with this evaluation board, ensure proper ESD handling precautions since the FUSB251 IC is sensitive to handling transients. Apply VBUS only after confirming the source voltage is within the FUSB251's absolute maximum ratings. Refer to the FUSB251 datasheet for the full OVP threshold table and recovery characteristics. This page synthesizes distributor pricing, eval-board documentation pointers, and engineering guidance not found in the manufacturer datasheet alone, helping design engineers accelerate USB Type-C protection evaluation and integration decisions.
FUSB251UCX - USB Type-C CC/SBU Protection Switch | onsemi
The onsemi FUSB251UCX is an I2C-controlled over-voltage protection switch for USB Type-C CC and SBU pins, housed in a 15-bump WLCSP (1.49x2.06 mm) package. The IC integrates SPST switches on CC1/CC2 and SBU1/SBU2 lines that automatically enable with a valid VDD supply, providing a protected analog and digital path between the USB Type-C receptacle and an external Type-C/PD controller. Its core function is to safeguard the downstream PD controller against fault voltages up to 20 V on the CC and SBU pins per USB Type-C specifications. A Type-C CC and SBU protection IC is a category of USB interface companion device that sits between the Type-C connector and the system PD controller, providing isolation, over-voltage protection, and signal routing on the Configuration Channel and Sideband Use lines. Within the broader power management and interface IC taxonomy, it belongs to USB Type-C interface protection switches, which in turn are a sub-category of interface ICs. These devices are mandatory building blocks in modern USB-C designs that need robust protection for hot-plug events and voltage faults. Key features of the FUSB251UCX include 4-channel SPST switching, programmable over-voltage protection thresholds via I2C, dead-battery Rd pull-down support that allows a source to provide VBUS when the device is unpowered, over-current protection, and thermal shutdown. The OVP response time is designed to clamp faults before downstream damage occurs, and the device supports CC signaling for USB Type-C attach/detach and orientation detection. The I2C interface enables host software to read status, configure thresholds, and switch channels on demand. Architecturally, the FUSB251UCX uses integrated N-MOSFET switches with OVP clamping structures. When VDD is valid, internal gate drivers turn on the switches; when a fault voltage exceeds the programmed threshold on any protected line, the switch opens in microseconds, disconnecting the protected PD controller from the fault. The dead-battery Rd pull-down is hard-wired (non-I2C controlled) so a power source can detect an attached sink even when the sink's battery is fully depleted. Typical applications include USB Type-C ports on smartphones, tablets, and laptops, USB-C docking stations, wall chargers, and any Type-C/PD port that requires robust CC and SBU protection. The wide OVP range and small WLCSP package make it suitable for space-constrained portable designs. When designing with this device, ensure the VDD supply is decoupled with a low-ESR 1uF ceramic capacitor placed close to the VDD ball. The exposed CSP land beneath the package should be soldered to a grounded copper pad for thermal dissipation and mechanical reliability. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the FUSB251UCX not found in the onsemi datasheet alone, optimized for engineers sourcing Type-C protection switches.
FUSB252UMX - USB Type-C CC & HSD Port Protection Switch | onsemi
The onsemi FUSB252UMX is an integrated USB Type-C port protection switch that combines a high-speed USB 2.0 (HSD) data switch with two channels of Configuration Channel (CC) protection switches, all packaged in a 16-pin UMLP (1.8x2.6 mm). It protects HSD+/- and CCx pins against voltage stress up to 20 V and provides Over-Voltage Protection (OVP) at 5.8 V typical to safeguard downstream SoCs from Electrical Overstress damage. An analog switch is a semiconductor device that routes analog or digital signals between multiple terminals under control of a logic signal; the FUSB252 belongs to the USB Type-C interface switch subcategory within Interface ICs, sitting inside the broader family of USB power-delivery and signal-integrity companions used in modern Type-C ports. The HSD switches pass USB 2.0 signals with 1 GHz bandwidth to preserve signal integrity and eye compliance, while the CC switches use very low 0.3 ohm RON to minimize signal attenuation across the Configuration Channel pull-up/pull-down terminations. Key features include integrated OVP at 5.8 V typical on data lines, 20 V tolerance on CC pins, dead-battery support per the Type-C specification (RD pull-down on CC pins when no power is applied), Under-Voltage Lockout (UVLO), and thermal shutdown. The device operates from a single VDD supply and consumes microamp-level quiescent current when idle, making it suitable for always-on Type-C ports. Architecturally, the FUSB252UMX integrates N-channel MOSFET switches for HSD and CC routing, a precision OVP comparator with sub-microsecond response time, and an internal charge pump that holds the gate drive during fault conditions. This monolithic integration eliminates the discrete TVS/load-switch stack typically required for Type-C protection, reducing BOM count and PCB area. Typical applications include smartphones, tablets, laptops, USB Type-C hubs and docks, wall chargers with cable compensation, and any embedded system that exposes a USB Type-C port requiring robust ESD/EOS protection. The 1.8x2.6 mm UMLP package is ideal for space-constrained mobile designs. When designing with this part, place it as close as possible to the USB Type-C connector pins to maximize ESD/TVS clamping effectiveness, and observe the recommended 100 nF VDD bypass capacitor within 2 mm of the supply pin. Designers migrating from discrete TVS arrays will save 30-50% of PCB area on the connector interface. This page synthesizes onsemi datasheet parameters, distributor stock and pricing, drop-in alternatives, and application design notes not collected on a single manufacturer page.
FUSB302TMPX - USB Type-C PD Controller, 14-MLP | onsemi
The onsemi FUSB302TMPX is a programmable USB Type-C controller with Power Delivery (PD) physical layer, supporting USB 3.1 interfaces in a 14-MLP (2.5x2.5 mm) WQFN package. It integrates attach/detach detection, orientation detection, and the BMC (Biphase Mark Code) PD physical layer enabling up to 100 W of negotiated power and role swap. The part targets wall chargers, travel adapters, and any embedded system that needs to negotiate USB Type-C power contracts. A USB Type-C controller is a category of interface IC that implements the detection, orientation, and (optionally) Power Delivery signaling required by the USB Type-C specification. The hierarchy flows: USB Type-C controller → interface IC → USB connectivity → power management role swap. Without such a controller, a device cannot reliably detect cable orientation, distinguish a 500 mA legacy sink from a 1.5 A/3 A Type-C sink, or negotiate higher-power PD contracts. Key features include a dedicated I2C interface for host control, three fixed-threshold comparators matching the Type-C specification for the three charging current levels, and a programmable DAC for software-driven CC-line state determination. The part handles VBUS detection and includes GPIO for interrupt-driven attach/detach signaling, reducing host MCU polling load. A default Source role is supported for charger-only applications without external MCU firmware. The FUSB302T architecture separates the PHY layer (implemented on-chip) from the protocol layer (handled by the host MCU), reducing BOM cost and silicon area. Reference code from onsemi is available for several embedded platforms (e.g., STM32, NXP Kinetis) to accelerate integration. The BMC PD block also covers alternative interfaces of the Type-C specification, including Audio Adapter and Debug Accessory modes. Typical applications include USB Type-C wall chargers, travel adapters, USB-PD capable power banks, docking stations, monitors, and any embedded host that needs to negotiate a PD contract up to 100 W (20 V/5 A). The small 2.5x2.5 mm package makes it ideal for compact adapter designs. Designers should note that the FUSB302T handles only the PD PHY; the protocol policy layer must be implemented on a host MCU. Reference firmware from onsemi covers basic PD negotiation, but custom applications (e.g., PPS, AVS) require additional protocol stack development. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including parametric comparison against same-family onsemi FUSB302 variants.
FUSB302TV01MPX - USB Type-C PD Controller, 14-WQFN | onsemi
The onsemi FUSB302TV01MPX is a programmable USB Type-C port controller with Power Delivery (PD) support, packaged in a 14-pin WQFN (2.5x2.5 mm) package and qualified to AEC-Q100 for automotive applications. It targets system designers implementing USB Type-C wall chargers, travel adaptors, automotive cigarette adaptors, laptops and notebooks where USB 3.1 host or device role-swap detection is required. The FUSB302T family implements the BMC PD physical layer enabling full support for the alternative interfaces of the Type-C specification, with reference code available for several embedded controller platforms. This TV01 variant ships with a default SRC (Source) role configuration, simplifying USB-C source-only designs. A USB Type-C controller is a specialized interface IC that manages the CC (Configuration Channel) pin negotiation, role detection, and power-delivery messaging between two attached Type-C ports. Within the broader hierarchy, the FUSB302T belongs to: USB Type-C port controller -> USB Power Delivery (USB PD) controller -> interface IC -> USB interface -> wired connectivity semiconductor. Its primary role is to act as the policy engine and BMC transceiver between a host MCU and the Type-C connector's CC1/CC2 pins, offloading the low-level USB PD protocol stack from the application processor. Key features include support for USB Type-C 1.2 and USB PD 2.0/3.0 signaling on both CC lines, an integrated BMC transmitter/receiver with hardware preamble/EOP generation, I2C interface up to 1 MHz for host control, and dual-role capability selectable through firmware. The device operates from a 3.0 V to 5.5 V supply rail, draws a low standby current for always-on applications, and exposes interrupt/GPIO pins for attach, detach, and PD message events. The FUSB302TV01MPX uses a mixed-signal architecture combining a 1.2V core digital logic block, analog CC line comparators with adjustable thresholds, and a BMC modem that handles 4b/5b symbol encoding, bi-phase-mark coding, and CRC-32 verification. This hardware offload frees the external MCU from tight real-time constraints and supports the full USB PD 3.0 extended message set, including PPS (Programmable Power Supply) and AVS (Adjustable Voltage Supply). Typical applications include USB Type-C wall chargers, travel adaptors, automotive cigarette-lighter adaptors, laptop docking stations, and power adaptors. Its automotive-grade qualification makes it especially attractive for in-vehicle charging ports and infotainment USB-C jacks. The wide host support across STM32, NXP Kinetis, and Renesas RX platforms shortens firmware development cycles. When designing with this device, pay close attention to CC pull-up/pull-down resistor selection to meet Type-C current advertisement (default, 1.5A, 3.0A). The VBUS discharge path must be sized to handle 20V at 5A per USB PD 3.0, and the CC lines require ESD protection rated to 8 kV contact / 15 kV air per IEC 61000-4-2 for robust consumer and automotive deployments. This page synthesizes distributor pricing, AEC-Q100 alternative cross-references, and practical design notes not found in the manufacturer datasheet alone, giving design engineers a faster path from selection to qualified PCB layout.
FUSB302TVMPX - USB Type-C PD Controller, 14-WQFN | onsemi
The onsemi FUSB302TVMPX is a programmable USB Type-C port controller with Power Delivery (PD) that supports USB 3.1 interface at 5 V in a 14-pin WQFN exposed-pad (2.5x2.5 mm) package. It implements the physical layer of the USB BMC Power Delivery protocol to enable up to 100 W of power negotiation, dual-role port (DRP) detection, attach/detach, orientation detection, and VCONN switching for USB Type-C wall chargers and travel adapters. The FUSB302TVMPX variant ships with default SRC role and I2C address Option 1, with three other I2C address options available in the TV01/TV10/TV11 sibling parts. A USB Type-C controller is a specialized interface IC that sits between a host processor (or embedded MCU) and the USB Type-C connector's Configuration Channel (CC) pins. The FUSB302T family integrates the BMC physical layer of USB Power Delivery, allowing a small external MCU to negotiate PD contracts, swap power roles, and select alternate modes without requiring a full USB PD stack on the host. The device reduces BOM cost and firmware complexity compared to integrating a complete PD PHY. Key features include USB Type-C 1.2 and USB PD 2.0 specification compliance, support for source, sink, and DRP roles, integrated BMC PD encoding/decoding, interrupt output for host wake-up, and an I2C interface (up to 400 kHz) for configuration. The 14-WQFN package with exposed thermal pad achieves a compact 2.5x2.5 mm footprint suited for space-constrained mobile and travel-adapter designs. Operating temperature range is -40C to +105C, qualifying the part for harsh-environment and automotive applications. Architecturally, the FUSB302T separates the CC-line physical interface from the upper-layer protocol, communicating with the host MCU via I2C registers and a single alert/interrupt pin. Reference firmware is available from onsemi for multiple embedded platforms, accelerating time-to-market. The PD physical layer is implemented in dedicated hardware so the host MCU only handles policy engine state transitions, greatly reducing firmware overhead. Typical applications include USB Type-C wall chargers, travel adapters, smart Type-C cables and docks, automotive head-unit chargers, monitor and hub USB-C inputs, and any embedded system that needs to negotiate up to 100 W over a Type-C connector while keeping firmware footprint small. The AEC-Q100 automotive grade qualification suits EV charging accessories and in-cabin infotainment power rails. When designing with the FUSB302TVMPX, ensure that the CC1/CC2 pins are protected with ESD diodes rated at or above 8 kV HBM contact discharge, and place the device close to the Type-C receptacle to minimize CC trace length. Use onsemi's reference schematic and I2C firmware libraries for fastest compliance with USB Type-C and USB PD test suites. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical PCB/design notes not found in the manufacturer datasheet.
FUSB303 - Autonomous USB Type-C Port Controller, 15W | onsemi
The onsemi FUSB303 is a fully autonomous USB Type-C port controller optimized for source, sink, DRP, and accessory detection applications up to 15 W, housed in a 12-lead X2QFN package measuring 1.6 x 1.6 mm. It provides CC logic detection for Source Port role, Sink Port role, Dual Role Port (DRP), and accessory detection, plus Dead Battery support as defined by the USB Type-C specification. The device operates from a 3.0 V to 5.5 V VDD supply and exposes a configurable I2C address plus a GPIO for multiple-port systems or pin-only autonomous configuration. A USB Type-C port controller is a specialized interface IC that manages the Configuration Channel (CC) pins and advertises the port's role (Source, Sink, or DRP) over the USB-C receptacle. It sits hierarchically between the physical USB-C connector, the system power management, and the application processor, and falls under the broader categories of interface ICs, USB controllers, and protocol controllers within a USB-C subsystem. Key features of the FUSB303 include ultra-low standby current, integrated CC line pull-up (Rp) and pull-down (Rd) resistors, automatic DRP toggle, Try.SNK / Try.SRC support, and detection of audio adapter accessories and debug accessories. The device supports USB Type-C R1.3 attach/detach signaling and reports the detected port role via I2C registers or the GPIO output. The 12-X2QFN package (1.6 x 1.6 mm, 0.4 mm pitch) makes it suitable for space-constrained mobile and wearable designs. Technically, the FUSB303 integrates analog CC comparators with hysteresis, a precision current source for Rp assertion, and a state machine implementing USB-C attach, detach, and Error Recovery transitions. The I2C interface supports standard (100 kHz) and fast (400 kHz) modes and four selectable 7-bit addresses, allowing up to four FUSB303 devices on one bus for multi-port systems. Typical applications include USB-C wall chargers, USB-C cable adapters, OTG dongles, tablets, smartphones, wearables, docking stations, and 15 W or less charging sinks and sources. The autonomous operation mode removes firmware dependency on the host MCU for basic CC detection. When designing with the FUSB303, pay attention to CC pull-up source current accuracy, VDD decoupling, and bypass capacitance on the connector side. Designers transitioning from FUSB303 to FUSB303B should review Error Recovery behavior since the B variant removes the Error Recovery state transition during mode changes. This page synthesizes distributor pricing, same-brand drop-in alternatives, and practical design notes not found in the onsemi datasheet alone.
FUSB307BMPX - USB Type-C TCPC Port Controller with USB-PD | onsemi
The onsemi FUSB307BMPX is a USB Type-C Port Controller (TCPC) with USB Power Delivery (USB-PD) capabilities, compliant with USB-PD Interface Specification Rev 1.0. It provides an I2C interface to an upstream Type-C Port Manager (TCPM), supports USB 3.0 signaling, and is housed in a 16-pin WQFN (3x3 mm) package with exposed thermal pad. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. USB Type-C Port Controllers with USB-PD fit into the broader hierarchy of USB interface ICs, themselves part of interface ICs that bridge processors to physical connectors. The FUSB307B acts as a standardized TCPC companion to a TCPM, offloading time-critical Power Delivery state-machine handling while letting the host processor manage policy and high-level decisions. Key features of the FUSB307BMPX include integrated USB Type-C Rev 1.3 detection circuitry with manual attach/detach detection, autonomous handling of time-critical USB-PD messaging, support for up to four Type-C ports when multi-plexed by a TCPM, and I2C control interface for register access, GPIO control, and status polling. The 16-pin WQFN package with exposed pad enables compact PCB layouts in space-constrained mobile and laptop designs where every square millimeter counts. Architecture-wise, the FUSB307B pairs a hardware USB-PD protocol layer (BMC-encoded CC signaling on the Configuration Channel lines CC1/CC2) with a software-accessible register map mapped through I2C. This hardware/software partitioning lets the TCPM run policy and source-power negotiation while the FUSB307B executes the deterministic time-budget tasks defined by the USB-IF TCPC specification, including GoodCRC timing and Hard Reset signaling. Typical applications include notebook USB-C charging ports, docking stations with multiple Type-C sinks, tablet and 2-in-1 convertible power paths, USB-PD chargers, and smartphone fast-charge adapters. The device is well suited wherever a standardized TCPC interface is needed and the system architect already uses a discrete TCPM such as a microcontroller or an embedded controller running compliant TCPM firmware. When designing with this part, ensure the I2C pull-ups are sized for the chosen bus speed (100 kHz Standard or 400 kHz Fast Mode) and that the CC1/CC2 lines have the appropriate Type-C Rp/Rd or pull-down/up scheme required by the desired Source/Sink role. The exposed thermal pad must be soldered to a sufficient ground copper pour to meet the package's thermal and electrical performance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement - not duplicate - the manufacturer datasheet, helping engineers shorten the path from selection to a working USB-PD-enabled prototype.
FUSB307BVMPX - USB Type-C Port Controller, USB-PD, 16-WQFN | onsemi
The onsemi FUSB307BVMPX is a USB Type-C Port Controller (TCPC) with integrated USB Power Delivery support, packaged in a 16-lead WQFN (3x3 mm). It implements the Type-C Rev 1.3 detection circuitry, supports manual attach/detach detection, and complies with the USB-PD Interface Specification Rev 1.0 as a TCPC for a standardized interface with a Type-C Port Manager (TCPM). A USB Type-C Port Controller is a companion IC that sits between a system processor (acting as the TCPM) and the physical Type-C connector. It handles the time-critical analog and digital signaling that the host CPU cannot service deterministically - including attach/detach detection, cable orientation (CC pin polarity), USB-PD messaging on the Configuration Channel (CC) lines, and VBUS/VCONN gate driver control. The FUSB307B offloads these tasks so the TCPM only has to handle higher-layer policy decisions. Key features include I2C interface for TCPM communication, integrated USB-PD Rev 1.0 message handling, manual attach/detach detection logic, dead-battery RD support, and dual-gate driver outputs for VBUS and VCONN MOSFETs. The 16-WQFN (3x3) package with exposed thermal pad supports compact PCB layouts in space-constrained designs such as laptops, tablets, and smartphone docking cradles. Architecture-wise, the FUSB307B uses an internal state machine to manage USB-PD protocol timing without firmware intervention on the TCPC itself. This deterministic hardware implementation is critical for USB-IF compliance certification, where sub-millisecond response times on CC line events are required for interoperability with the wider Type-C ecosystem. Typical applications include notebooks and laptops, USB Type-C docking stations, tablet PCs and 2-in-1 detachables, smartphone fast-charging adapters, and automotive USB Type-C infotainment ports. Up to four FUSB307B devices can be cascaded from a single TCPM via I2C, enabling multi-port designs. The onsemi community forum currently lists this part as EOL (case 216718), so verify last-time-buy status before committing to new designs. When designing with this device, ensure proper sequencing of the upstream 3.3V and 1.2V rails before I2C access, and place the VBUS/VCONN gate-driver traces close to the external N-FETs to minimize parasitic inductance. Decouple VCC and VBAT pins with 1uF and 0.1uF ceramics as recommended in the onsemi datasheet. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
FXMA2102L8X - Dual Supply 2-Bit I2C Level Translator | onsemi
The onsemi FXMA2102L8X is a dual-supply, 2-bit configurable bidirectional voltage level translator / buffer / repeater with a maximum data rate of 37 MHz, housed in an 8-pin MicroPak (L8X) surface-mount package. It is designed for I2C bus and general-purpose open-drain or push-pull voltage translation between two independently supplied voltage domains. A voltage level translator (also called a level shifter) is an interface IC that bridges digital circuits operating at different supply voltages, allowing a 1.8V microcontroller to safely communicate with a 3.3V sensor or a 5V peripheral. Level translators sit within the broader logic IC and interface IC hierarchy and are essential wherever mixed-voltage subsystems must share a bus. Key features of the FXMA2102 include truly bidirectional operation with automatic direction sensing, so no direction-control pin is required on the I2C data (SDA) and clock (SCL) lines. Its wide dual-supply architecture supports translation over a wide range of input and output voltage levels, and the device functions as a buffer, repeater, and isolator for I2C applications, isolating bus capacitance and extending bus length. The device requires external pull-up resistors on both sides, per the onsemi product page. Technically, the FXMA2102 uses configurable dual voltage supplies (VCCA and VCCB) with architecture that makes each I/O pin referenced to its own supply rail. The 37 MHz data-rate capability comfortably exceeds the 3.4 MHz High-speed mode of the I2C specification, giving large timing margin. Buffering capability isolates the capacitance of one bus segment from the other, which is critical for heavily loaded or long PCB traces and cable runs. Typical applications include I2C bus level translation between 1.8V, 2.5V, 3.3V, and 5V domains, SMBus and PMBus interfaces in power systems, sensor hubs mixing voltage domains, and general-purpose 2-bit bidirectional translation in industrial and consumer electronics. Its tiny MicroPak footprint suits space-constrained portable designs. Design consideration: because the device is intended for open-drain I2C use, external pull-up resistors must be provided on both the A-side and B-side; size them against total bus capacitance and the required rise time to preserve signal integrity at speed. This page synthesizes distributor pricing, drop-in alternatives, practical design notes, and FAQ content not found in a single manufacturer datasheet, providing information gain over standard distributor listings.
GT9110 - 10-Point Capacitive Touch Controller IC | Goodix
The Goodix GT9110 is a new-generation single-chip 10-point capacitive touch controller IC designed for tablet PCs and medium-to-large capacitive touch panels. The device integrates up to 42 transmitter electrodes and 30 receiver electrodes, providing higher touch accuracy and resolution for displays typically ranging from 7 inches up to 10.4 inches (and beyond). It is housed in a compact QFN package suitable for space-constrained touch panel designs, and communicates with the host processor through a standard I2C interface. A capacitive touch controller is a semiconductor device that senses the change in capacitance caused by a finger or stylus contacting a projected-capacitive (PCAP) touch panel and translates those measurements into multi-point coordinates. The GT9110 sits within the broader hierarchy: capacitive touch controller -> touch sensing IC -> human-machine interface (HMI) controller -> mixed-signal semiconductor. Unlike resistive touch controllers, capacitive controllers such as the GT9110 support true multi-touch and gesture recognition without requiring mechanical pressure on the panel. Key features include support for up to 10 concurrent touch points with real-time accurate coordinate, motion trajectory, and touch area reporting. The GT9110 reports touch information selectively based on the host controller's requested number of points, optimizing I2C bus bandwidth. The device supports projected-capacitive G+G and G+F+F panel structures and is qualified for transmittance >=85% with appropriate cover-lens stacks. The internal signal processing provides adaptive frequency hopping to suppress noise from displays and chargers. Architecturally, the GT9110 combines an analog front-end with a programmable digital processor that runs Goodix's proprietary touch-detection algorithms. The device supports auto-calibration at power-on and continuous environmental compensation during operation, eliminating the need for host-side recalibration. The host interface is configurable I2C with selectable device address, enabling two chips on the same bus for larger panel designs. Typical applications include Android and Windows tablets, industrial human-machine interface (HMI) panels, 2-in-1 convertible notebooks, smart-home control panels, and automotive rear-seat entertainment displays. It is widely adopted in 7-10.4 inch G+G capacitive touch panels from major LCD module vendors. A representative reference design is the DWIN TPC104T0008G01V1 10.4-inch capacitive touch panel with transmittance >=85%. When designing with the GT9110, observe the I2C pull-up resistor values (2.2 kohm to 4.7 kohm depending on bus capacitance), keep the I2C traces short and shielded from noise sources, and follow Goodix's PCB layout guidelines for the sensor pattern routing. The reset and interrupt lines should be pulled correctly per the datasheet to avoid initialization failures. This page synthesizes distributor pricing, same-brand Goodix family variants, and practical design notes not found in the manufacturer datasheet.