Texas Instruments TXU0104DTRR

Overview

TXU0104DTRR from Texas Instruments is a 4-bit fixed-direction voltage-level translator with Schmitt-trigger inputs and 3-state outputs, supporting dual-rail operation from 1.1V to 5.5V per port, up to 200Mbps data rate (3.3V→5.0V), and operating across –40°C to +125°C. It enables robust level shifting in mixed-voltage I/O interfaces such as UART, SPI, and JTAG between microcontrollers and peripherals.

For engineers reviewing the TXU0104DTRR datasheet, TXU0104DTRR pinout, TXU0104DTRR application, or TXU0104DTRR equivalent, this device delivers precise bidirectional translation control via active-high OE, VCC isolation for partial-power-down, and integrated static pull-downs to prevent floating inputs - critical for noise-prone industrial and automotive signal conditioning.

Technical Context

The TXU0104DTRR implements noninverting fixed-direction translation where A-port signals (A1–A4) reference VCCA and B-port outputs (B1Y–B4Y) reference VCCB. Data flows unidirectionally from A to B or B to A depending on OE logic state and supply configuration, with no internal direction control logic - direction is determined solely by which port is driven and which is loaded.

Its Schmitt-trigger inputs provide hysteresis (ΔVT = 0.20–1.18V, dependent on VCCI), enabling reliable operation with slow-rising or noisy waveforms. The VCC isolation feature disables all outputs into high-impedance when either VCCA or VCCB falls below 100 mV, preventing backfeeding and ensuring safe power sequencing in multi-rail systems.

Key Specifications

Pinout & Package

TXU0104DTRR is packaged in a 12-pin X2SON (DTR) package measuring 1.70 mm × 1.00 mm with 0.5-mm pitch, optimized for space-constrained PCB layouts and thermal performance (R_θJA = 176.6°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-level translation applications.

Compared with TXB0104RGYR and SN74AVC4T245PW, TXU0104DTRR uniquely combines Schmitt-trigger noise immunity, 5V-tolerant I/O, and true dual-supply isolation - making it the only option among the three qualified for automotive body-control modules and industrial sensor hubs requiring robustness across voltage, temperature, and EMI stress.

Availability

TXU0104DTRR is available at Aetrix Electronics and suitable for industrial automation, automotive infotainment gateways, and IoT edge node designs requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TXU0104DTRR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and design-in support.

The TXU0104DTRR belongs to TI's voltage-level translation portfolio, engineered specifically for robust, low-power, mixed-voltage interoperability in harsh environments - targeting automotive, industrial, and communications infrastructure applications.

FAQ

What is the maximum supported data rate for TXU0104DTRR in a 3.3V-to-5.0V translation scenario?

The TXU0104DTRR supports up to 200 Mbps in 3.3V-to-5.0V up-translation mode, as specified in the datasheet's switching characteristics table (Section 5.6). This performance is validated across the full operating temperature range (–40°C to +125°C) with proper layout and decoupling, making TXU0104DTRR suitable for high-speed UART and SPI interfaces where timing margin is critical.

Does TXU0104DTRR support bidirectional data flow?

No - TXU0104DTRR is a fixed-direction translator. Data flows from A-port to B-port or B-port to A-port depending on which side is driven and which is loaded, but direction is not actively controlled by the device. Unlike auto-sensing translators (e.g., TXB series), TXU0104DTRR requires external system-level direction management; its OE pin controls only output enable/disable, not signal direction.

Can TXU0104DTRR operate with VCCA = 1.2V and VCCB = 5.0V simultaneously?

Yes - TXU0104DTRR fully supports asymmetric dual-supply operation across its rated ranges: VCCA = 1.1V–5.5V and VCCB = 1.1V–5.5V independently. At VCCA = 1.2V and VCCB = 5.0V, it achieves up to 30 Mbps (per Section 5.6), with propagation delay <45 ns and output skew <45 ns, enabling reliable low-voltage MCU interfacing to legacy 5V peripherals.

How does the Schmitt-trigger input benefit TXU0104DTRR in real-world applications?

The Schmitt-trigger input provides hysteresis (ΔVT = 0.20–1.18 V depending on VCCI), allowing TXU0104DTRR to cleanly interpret slow-rising or electrically noisy signals - such as those from mechanical switches, long cables, or unshielded sensors - without oscillation or metastability. This eliminates the need for external RC filters or firmware debouncing, simplifying design and improving real-time responsiveness in industrial and automotive use cases.

Is the thermal pad on the TXU0104DTRR X2SON package required to be connected to ground?

Yes - the exposed thermal pad on the TXU0104DTRR DTR package must be soldered to a PCB thermal pad connected to GND for optimal thermal performance and electrical stability. TI's datasheet recommends grounding the pad to reduce junction temperature rise and improve ESD robustness; leaving it floating degrades R_θJB by >30% and may cause signal integrity issues in high-speed operation.