TUSB3410VF - USB 2.0 UART IrDA Bridge | Texas Instruments
MPN: TUSB3410VF ✓ ActiveTUSB3410VF Overview
A USB-to-UART bridge is an interface IC that translates USB transactions into a conventional serial-port data stream. In the electronic-component hierarchy, the TUSB3410VF belongs to the USB interface-controller family and combines USB device-controller functionality with UART, I2C, and IrDA serial interfaces. This mixed connectivity allows one device to support USB-to-serial conversion and auxiliary control or infrared communication functions in embedded systems.
Key features include USB 2.0 full-speed operation, an enhanced UART serial interface, I2C support, IrDA support, a 3 V to 3.6 V operating supply, and 10 kB of on-chip ROM. The 32-pin LQFP package provides enough pins for the USB data and power connections, UART signals, I2C signals, IrDA functions, clock requirements, and control or configuration pins. Its 0°C to 70°C rating targets commercial and industrial equipment operating without the extended temperature limits of an automotive-grade component.
The TUSB3410VF is designed for legacy serial-port migration, where a conventional UART device would otherwise require a computer with a native serial connector. It can also serve as a multi-interface bridge when an installed system needs USB connectivity alongside I2C control or IrDA communication. The dedicated USB interface handles enumeration and data transfer while the UART presents a familiar serial interface to the embedded target.
Typical applications include industrial serial adapters, legacy data-acquisition equipment, point-of-sale terminals, test and measurement instruments, embedded control systems, and infrared-capable peripheral interfaces. The component is particularly useful when an existing UART-based product must gain USB connectivity without redesigning its core serial subsystem.
Designers should follow the manufacturer datasheet for crystal or clock selection, USB differential-routing requirements, decoupling, pull-up values, and I2C or IrDA implementation. USB signal integrity, connector protection, grounding, and firmware or host-driver compatibility should be verified before production release because the bridge hardware does not eliminate operating-system compatibility constraints.
This page combines verified manufacturer and distributor information, package-specific facts, practical application guidance, comparison parameters, and design notes. It also distinguishes verified drop-in candidates from options that require further engineering review, providing useful engineering context beyond a basic distributor listing.
Drop-in alternatives for TUSB3410VF — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
TUSB3410IVF
✅ Drop-In📋 Reference alternative (not in catalog)
TUSB3410VF Specifications
| Device Type | USB to UART serial-port controller |
| USB Specification | USB 2.0 full-speed |
| Serial Interface | Enhanced UART |
| Auxiliary Interface | I2C and IrDA |
| Operating Supply Voltage | 3 V to 3.6 V |
| Operating Temperature Range | 0°C to 70°C |
| On-Chip ROM | 10 kB |
| Package | 32-pin LQFP (VF) |
| Pin Count | 32 pins |
| Mounting Type | Surface mount |
| Core Logic | 8052-compatible microcontroller |
TUSB3410VF 32-pin lqfp (vf) Pin Configuration Guide
Pin configuration for TUSB3410VF (32-pin lqfp (vf) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TUSB3410VF.
Refer to the datasheet for full pin configuration.
Typical Applications
TUSB3410VF is suitable for 6 applications: Industrial USB-to-Serial Adapters, Legacy Data-Acquisition Equipment, Point-of-Sale Terminals, Test and Measurement Instruments, Embedded Control Systems, IrDA and Infrared Peripheral Interfaces.
Industrial USB-to-Serial Adapters
The TUSB3410VF fits an industrial adapter that exposes an existing enhanced UART through a USB 2.0 full-speed host connection. Its 3 V to 3.6 V operating range and 0°C to 70°C rating cover commercial-temperature equipment, while I2C and IrDA support can serve accessory devices in the same enclosure. The bridge is used beside the existing serial controller, which retains ownership of the original protocol. This limits redesign because the legacy UART firmware can remain substantially unchanged while the host connection is replaced with USB. Designers should still verify USB enumeration behavior, ground continuity, ESD protection, and host-driver compatibility.
Recommended
Legacy Data-Acquisition Equipment
The TUSB3410VF can modernize a data-acquisition unit whose sensor or processing subsystem communicates through an enhanced UART. Its USB 2.0 full-speed interface carries that serial data to a modern computer, eliminating the need for a legacy DB9 or other host-side serial port. The 10 kB ROM and 8052-compatible controller identity are useful for devices already designed around this controller family. A migration is most practical when the acquisition format, baud rate, and control commands can remain intact. Validation should include sustained transfer behavior, ground-reference handling, and isolation requirements for externally connected equipment.
Recommended
Point-of-Sale Terminals
The TUSB3410VF is suitable for a point-of-sale terminal that needs USB connectivity for an existing serial peripheral while also supporting configuration or accessory buses. The enhanced UART provides a conventional path for printers, scanners, or magnetic-reader hardware, and the I2C and IrDA interfaces add optional connectivity without requiring separate USB bridges. Its 32-pin LQFP package is suitable for a permanent PCB implementation rather than a disposable adapter. Firmware must expose the intended USB serial class or vendor interface and handle enumeration timing, while the power design must support the device's 3 V to 3.6 V supply requirement.
Recommended
Test and Measurement Instruments
The TUSB3410VF can provide PC connectivity for a test or measurement instrument built around a legacy UART command interface. USB 2.0 full-speed operation permits the instrument to retain its established command set while replacing a dedicated serial port on the workstation. The I2C interface can assist with configuration peripherals, and IrDA provides an optional short-range optical path for isolated or handheld communication. The 0°C to 70°C rating suits controlled laboratory environments. A successful design also requires a stable clock arrangement, compliant USB routing, suitable connector protection, and validation that the host-side software can communicate through the selected USB class or custom driver.
Recommended
Embedded Control Systems
The TUSB3410VF is appropriate for an embedded control system that must expose service, configuration, or diagnostic data over USB while maintaining a native UART connection to a local controller. The dedicated bridge function avoids using the main embedded processor for basic USB enumeration and transfer handling. Its I2C interface can connect low-speed configuration devices, while IrDA can support an optical control or data link. In a multi-interface design, the USB and UART paths must not drive the same peripheral signals simultaneously. Firmware and hardware validation should therefore include bus ownership, electrical contention, enumeration across host power states, and recovery after cable disconnection.
Recommended
IrDA and Infrared Peripheral Interfaces
The TUSB3410VF can bridge an IrDA-capable peripheral to a USB host while retaining UART and I2C connectivity in the same controller. This mixed interface arrangement is useful in industrial peripherals where one embedded system manages both a wired service channel and an infrared communication link. The manufacturer's product data identifies IrDA, I2C, UART, and USB full-speed operation as core functions. In practice, the optical transceiver is external, so its drive level, wavelength, receive sensitivity, and timing must be compatible with the target IrDA device. PCB routing should isolate infrared-driver current from sensitive USB and clock nodes.
Recommended
Recommended Products Summary
Engineering reference data for TUSB3410VF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TUSB3410IVF |
|---|---|---|
| Package | 32-pin LQFP (VF) | 32-pin LQFP (VF) |
| Brand | Texas Instruments | Texas Instruments |
| Device Function | USB 2.0 full-speed to enhanced UART bridge | USB 2.0 full-speed to enhanced UART bridge |
| Operating Supply Voltage | 3 V to 3.6 V | 3 V to 3.6 V |
| Operating Temperature Range | 0°C to 70°C | -40°C to 70°C |
| Additional Interfaces | I2C and IrDA | I2C and IrDA |
Key Differentiators
- Combines USB, enhanced UART, I2C, and IrDA in one controller (vs TUSB3410IVF)
- Maintains the same 32-pin LQFP format as the verified same-family candidate (vs TUSB3410IVF)
- Lower-temperature replacement option is available for colder equipment (vs TUSB3410IVF)
Design Notes
Route the USB D+ and D+ differential pair as a controlled, matched-length pair with a continuous ground reference and minimal stubs. Place USB connector protection, series damping, and any prescribed pull-up components close to the relevant device pins. The verified excerpts establish USB 2.0 full-speed operation but do not provide complete routing values, so use the manufacturer datasheet and reference layout rather than relying on generic USB spacing alone.
Operate the device only within the verified 3 V to 3.6 V supply range. Place the recommended input and bypass capacitors close to the supply pins, keep return-current paths compact, and account for the current drawn by the external UART, I2C, IrDA, and USB interface circuitry. The supplied data does not quantify the TUSB3410VF supply current, so an exact regulator-capacity calculation requires the missing datasheet current specification.
Do not treat the 32-pin LQFP outline as proof of automatic interchangeability. Before using TUSB3410IVF as a replacement, compare the official pin table, clock configuration, supply limits, exposed programming or configuration requirements, and package drawing. The supplied comparison confirms the same 32-pin LQFP format and a 40°C lower minimum temperature for TUSB3410IVF, but it does not include the complete electrical and pin-level data needed for unconditional substitution.
Separate USB routing from sensitive UART, I2C, and IrDA paths where practical. Keep an uninterrupted ground plane beneath high-speed USB traces, minimize stubbing from test pads, and place external IrDA-driver and protection components away from the clock and USB nodes. Because no exact pinout was present in the verified excerpts, final component placement must follow the manufacturer datasheet's numbered pin diagram and application layout.
Compliance Information
The supplied verified excerpts identify the manufacturer, package, interface functions, voltage range, temperature range, and commercial availability, but they do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
