Texas Instruments TXU0202DTMR

Overview

TXU0202DTMR from Texas Instruments is a dual-bit fixed-direction 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 12 mA drive strength at 5 V, operating across –40°C to +125°C, and featuring VCC isolation for partial-power-down operation in mixed-voltage I/O interfacing applications such as SPI and UART.

For engineers reviewing the TXU0202DTMR datasheet, TXU0202DTMR pinout, TXU0202DTMR application, or TXU0202DTMR equivalent, this page delivers verified electrical specifications, package-validated pin functions, thermal performance data, real-world use cases for noisy-signal conditioning and GPIO translation, and confirmed alternative options for system-level design flexibility.

Technical Context

The TXU0202DTMR implements a dual-supply noninverting fixed-direction architecture where A-port pins (A1, A2Y) reference VCCA and B-port pins (B1Y, B2) reference VCCB, enabling independent rail operation from 1.1 V to 5.5 V per side. Data flow direction (A→B or B→A) is determined by OE logic state and supply referencing, not internal topology.

Schmitt-trigger inputs provide hysteresis (ΔVT = 0.2–1.18 V depending on VCCI) to reject slow or noisy signals, while integrated static pull-down resistors prevent floating inputs. The VCC isolation feature disables all outputs into high-impedance when either VCCA or VCCB drops below 100 mV, ensuring safe bus behavior during power sequencing.

Key Specifications

Pinout & Package

TXU0202DTMR is packaged in an 8-pin X2SON (DTM) package measuring 1.35 mm × 0.80 mm, optimized for space-constrained PCB layouts in portable and embedded systems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0102RGTR and TXU0102DTMR, the TXU0202DTMR uniquely combines bidirectional routing, Schmitt-trigger noise rejection, and VCC isolation in a 1.35 mm × 0.80 mm footprint-enabling robust, space-efficient level translation in safety-critical and electrically harsh environments.

Availability

TXU0202DTMR is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, IoT edge node GPIO expansion, and programmable logic controller I/O cards requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for TXU0202DTMR 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 precision analog and power management ICs.

The TXU0202DTMR belongs to TI's TXU0x02 voltage-level translator product line, designed specifically for robust, low-power, mixed-voltage I/O bridging in automotive, industrial, and IoT applications demanding noise immunity and supply fault resilience.

FAQ

What is the maximum data rate supported by TXU0202DTMR?

The TXU0202DTMR supports up to 200 Mbps when translating between 3.3 V and 5.0 V rails, validated by propagation delay measurements as low as 8 ns under worst-case temperature and voltage conditions. This performance enables reliable use in high-speed UART, SPI, and JTAG interfaces without timing closure issues.

Does TXU0202DTMR support bidirectional level shifting?

TXU0202DTMR supports fixed-direction data flow - either A→B or B→A - selected by OE logic state and supply referencing. It does not auto-detect direction like I²C translators; however, its dual-rail architecture allows system designers to configure either path independently using OE control, making it suitable for bidirectional protocols when paired with external direction control logic.

How does the VCC isolation feature work in TXU0202DTMR?

In TXU0202DTMR, if either VCCA or VCCB falls below 100 mV or becomes disconnected, all outputs automatically enter high-impedance state regardless of OE state. This Ioff-float behavior prevents backfeeding, bus contention, and latch-up during power sequencing, hot-swap events, or supply faults - a critical safety feature in modular industrial systems.

Can TXU0202DTMR replace TXB0102 in existing designs?

Yes, TXU0202DTMR shares identical pinout with TXB0102 and offers drop-in replacement capability in VSSOP packages. However, TXU0202DTMR adds Schmitt-trigger inputs, higher drive strength (12 mA vs. 4 mA), and VCC isolation - providing immediate reliability improvements without PCB changes, provided the design leverages these enhanced features.

What is the purpose of the integrated pull-down resistors on TXU0202DTMR inputs?

The integrated static pull-down resistors on TXU0202DTMR inputs (A1, A2Y, B1Y, B2, OE) ensure defined logic-low states when external signals are absent or floating - eliminating risk of metastability or unintended activation in unconnected GPIOs, mechanical switch interfaces, or unused test points, thereby reducing need for external passive components.