Texas Instruments TXU0204DTRR

Overview

TXU0204DTRR from Texas Instruments is a 4-bit fixed-direction dual-supply voltage-level translator with Schmitt-trigger inputs and 3-state outputs, supporting bidirectional level shifting between 1.1 V and 5.5 V rails, delivering up to 200 Mbps (3.3 V → 5.0 V), 12 mA drive strength at 5 V, and operation from –40°C to +125°C. It enables robust GPIO, UART, and SPI interfacing across mixed-voltage microcontroller systems.

For engineers reviewing the TXU0204DTRR datasheet, TXU0204DTRR pinout, TXU0204DTRR application, or TXU0204DTRR equivalent, key selection criteria include its VCCA/VCCB dual-rail flexibility, Ioff-float isolation for partial power-down, Schmitt-trigger noise immunity on all inputs, and compatibility with space-constrained X2SON-12 packaging.

Technical Context

The TXU0204DTRR implements fixed-direction translation with independent A-port (Ax, OE referenced to VCCA) and B-port (Bx referenced to VCCB) logic domains. Data flows unidirectionally either A→B or B→A depending on OE state and supply referencing - no auto-sensing or direction control logic is present.

Its Schmitt-trigger inputs provide hysteresis (ΔVT = 0.2–1.18 V, dependent on VCCI), enabling reliable operation with slow-rising or noisy signals. The integrated static pull-down resistors prevent floating inputs, while VCC isolation (Ioff-float) forces all outputs into high-impedance when either VCCA or VCCB drops below 100 mV.

Key Specifications

Pinout & Package

X2SON-12 package (1.70 mm × 1.00 mm), ultra-compact footprint ideal for wearables, sensor nodes, and dense MCU peripheral interfaces. Thermal pad recommended to be grounded for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0104RGER, TXU0204DTRR adds essential robustness features (Schmitt inputs, Ioff-float) without layout impact; versus TXU0104DTRR, it provides critical bidirectional flexibility for mixed-protocol MCU peripherals - both differences directly affect system reliability and signal integrity in real-world deployments.

Availability

TXU0204DTRR is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, wearable health monitors, and smart home hub designs requiring stable component supply across extended temperature ranges and mixed-voltage architectures.

Supply support for TXU0204DTRR 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 specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in high-reliability electronic components.

The TXU0x04 family was designed specifically for robust, low-power, mixed-voltage system interfacing - targeting space-constrained, thermally demanding, and noise-prone applications in automotive, industrial, and portable electronics.

FAQ

What is the maximum supported data rate for TXU0204DTRR in a 3.3 V to 5.0 V translation configuration?

The TXU0204DTRR supports up to 200 Mbps when translating from 3.3 V (VCCA) to 5.0 V (VCCB), as specified in the switching characteristics table under "Up Translation" with 3.0–3.6 V input and 4.5–5.5 V output conditions. This rate applies across the full –40°C to +125°C operating range and assumes proper signal integrity layout practices.

Does TXU0204DTRR support bidirectional data flow, and how is direction controlled?

Yes, TXU0204DTRR supports configurable bidirectional translation: data flows A→B when OE is high and referenced to VCCA, or B→A when OE is high and referenced to VCCB. Direction is determined solely by OE's supply reference and logic state - no internal direction-sensing logic exists. OE low disables all outputs regardless of supply reference.

How does the Ioff-float feature function in TXU0204DTRR, and what design benefit does it provide?

In TXU0204DTRR, Ioff-float activates when either VCCA or VCCB drops below ~100 mV, forcing all outputs into high-impedance state. This prevents back-current flow into a powered-down rail, eliminates leakage paths during partial power-down modes, and avoids unintended activation of downstream circuitry - critical for battery-backed or sleep-mode systems.

Can TXU0204DTRR be used with 1.2 V logic on one side and 1.8 V on the other, and what is the typical propagation delay?

Yes, TXU0204DTRR fully supports 1.2 V ↔ 1.8 V translation. At VCCA = 1.2 V ± 0.1 V and VCCB = 1.8 V ± 0.15 V, the typical propagation delay (tpd) is 22 ns (A→B) and 23 ns (B→A) over –40°C to +85°C, per Section 7.7 of the datasheet. Delays remain stable across temperature and voltage tolerances.

Is TXU0204DTRR pin-compatible with any legacy level shifters, and what advantages does it offer over them?

TXU0204DTRR is pin-compatible with the TXB0104 family in X2SON-12, TSSOP-14, and VQFN-14 packages. It improves upon TXB0104 with Schmitt-trigger inputs (for noise immunity), Ioff-float (for safer partial power-down), higher drive strength (12 mA vs. 4 mA), and lower quiescent current (2.5 µA vs. 10 µA), making it suitable for next-generation low-power, high-noise applications.