Texas Instruments TXU0304QWBQARQ1

Overview

TXU0304QWBQARQ1 from Texas Instruments is an AEC-Q100 qualified 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 translation (3.3V→5.0V), and operating across –40°C to +125°C for automotive body control modules and infotainment interfaces.

For engineers reviewing the TXU0304QWBQARQ1 datasheet, TXU0304QWBQARQ1 pinout, TXU0304QWBQARQ1 application, or TXU0304QWBQARQ1 equivalent, key selection criteria include VCCA/VCCB supply independence, Schmitt-trigger noise immunity on all data inputs, OE logic referenced to either rail, Ioff-float isolation behavior, and wettable flank QFN (WBQA) package compatibility with automated optical inspection.

Technical Context

This device implements a noninverting fixed-direction level-shifting architecture where A-port signals translate to B-port (or vice versa) only when OE is high; all outputs enter high-impedance state when OE is low. Each port's logic threshold is referenced to its own supply (VCCA or VCCB), enabling true bidirectional voltage domain bridging without internal direction control logic.

Schmitt-trigger inputs provide ≥0.2V hysteresis (up to 1.18V at 5.5V) to reject slow-edge or noisy signals, while integrated static pull-down resistors prevent floating inputs. The VCC isolation feature disables outputs if either VCCA or VCCB drops below 100mV, and Ioff-float ensures sub-2.5µA leakage during partial power-down.

Key Specifications

Pinout & Package

TXU0304QWBQARQ1 uses the WBQA (VQFN, 14-pin) package: 3mm × 2.5mm body with wettable flanks for solder joint inspection, thermal pad (recommended grounded), and no internal connections on pins 6 and 9.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0104QWRQ1, TXU0304QWBQARQ1 adds Schmitt-trigger noise rejection and Ioff-float for robust automotive power sequencing; versus TXU0104QWBQARQ1, it provides full bidirectional translation flexibility at identical footprint and thermal performance.

Availability

TXU0304QWBQARQ1 is available at Aetrix Electronics and suitable for automotive body control units, ADAS sensor hubs, infotainment display interfaces, and gateway ECUs requiring stable component supply across extended temperature and AEC-Q100-compliant production cycles.

Supply support for TXU0304QWBQARQ1 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 automotive-grade ICs, with decades of experience delivering AEC-Q100-qualified solutions for safety-critical vehicle systems.

The TXU0x04-Q1 product line delivers automotive-qualified, Schmitt-triggered, dual-supply level translators optimized for noise-prone environments and complex power-domain architectures in modern E/E vehicle platforms.

FAQ

What is the maximum supported data rate for TXU0304QWBQARQ1 in 1.8V-to-3.3V translation?

TXU0304QWBQARQ1 supports up to 100Mbps in 1.8V-to-3.3V up-translation (A→B) and 50Mbps in 3.3V-to-1.8V down-translation (B→A), as specified in Section 6.6 of the datasheet under TMAX conditions at –40°C to 125°C. These rates assume 50% duty cycle and proper load termination.

Does TXU0304QWBQARQ1 support true bidirectional level shifting?

TXU0304QWBQARQ1 is a fixed-direction translator but supports bidirectional *system-level* operation: data can flow A→B when OE is asserted relative to VCCA, or B→A when OE is asserted relative to VCCB. However, both directions cannot be active simultaneously - direction is determined by OE reference and control logic configuration.

How does the Ioff-float feature behave when VCCA is disconnected and VCCB remains powered?

When VCCA is disconnected (or <100mV) while VCCB remains powered, TXU0304QWBQARQ1 places all A-port outputs (A4Y) and B-port outputs (B1Y–B3Y) into high-impedance state, and leakage current remains ≤±2.5µA. This prevents back-driving of the A-port domain and protects downstream circuitry during partial power-down sequences.

Can TXU0304QWBQARQ1 replace TXB0104QWRQ1 without PCB changes?

Yes - TXU0304QWBQARQ1 is pinout-compatible with TXB0104QWRQ1 in the WBQA package and shares identical footprint and thermal pad layout. However, design validation is required for Schmitt-trigger timing effects, higher drive strength, and Ioff-float behavior, especially in systems lacking explicit OE control or noise filtering.

What is the input threshold hysteresis (ΔVT) of TXU0304QWBQARQ1 at 3.3V supply?

At VCCA = VCCB = 3.3V, TXU0304QWBQARQ1 exhibits a typical input threshold hysteresis (ΔVT) of 0.46V–0.72V, with VT+ = 1.48V–1.92V and VT− = 1.01V–1.50V across temperature. This ensures reliable noise margin against >460mV peak-to-peak interference on data or control lines.