Texas Instruments TXU0102DTMR

Overview

TXU0102DTMR from Texas Instruments is a dual-bit, fixed-direction voltage-level translator with Schmitt-trigger inputs and 3-state outputs. It operates across independent 1.1 V–5.5 V dual rails (VCCA/VCCB), supports up to 200 Mbps (3.3 V → 5.0 V), features integrated static pull-downs on all inputs, and delivers ±12 mA drive strength at 5 V. It enables robust level shifting in mixed-voltage I/O interfaces such as UART and SPI between microcontrollers and peripherals.

For engineers reviewing the TXU0102DTMR datasheet, TXU0102DTMR pinout, TXU0102DTMR application, or TXU0102DTMR equivalent, key selection criteria include its dual-supply flexibility, Schmitt-trigger noise immunity, VCC isolation (Ioff-float), OE control referenced to either rail, and compatibility with TXB-family layouts for drop-in replacement in space-constrained designs.

Technical Context

The TXU0102DTMR implements noninverting fixed-direction translation: data flows unidirectionally from A-port (VCCA-referenced) to B-port (VCCB-referenced) or vice versa, controlled solely by OE logic state. Its Schmitt-trigger inputs provide hysteresis (ΔVT = 0.2–1.18 V depending on supply) to reject slow or noisy signals, while integrated weak pulldowns prevent floating inputs when externally undefined.

VCC isolation ensures that if either VCCA or VCCB falls below 100 mV or disconnects, all outputs enter high-impedance mode-critical for partial-power-down operation. The OE pin accepts logic levels referenced to VCCA or VCCB, eliminating need for external level-shifting of the enable signal.

Key Specifications

Pinout & Package

TXU0102DTMR is packaged in an 8-pin X2SON (DTM) package measuring 1.35 mm × 0.80 mm, optimized for high-density PCB layouts and thermal performance (RθJA = 253.6°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0102RGTR, TXU0102DTMR adds Schmitt-trigger noise rejection and VCC isolation-critical for automotive and industrial edge nodes-while doubling drive strength. Against TXU0202DTMR, it trades bidirectional flexibility for tighter propagation delay control in fixed-direction paths, making it preferable for time-critical UART/SPI links.

Availability

TXU0102DTMR is available at Aetrix Electronics and suitable for industrial automation interfaces, automotive body electronics, and battery-powered IoT sensor hubs requiring stable component supply, extended temperature operation, and long-term lifecycle support.

Supply support for TXU0102DTMR 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 for industrial, automotive, and personal electronics markets.

The TXU0x02 product line delivers robust, low-power voltage translation for mixed-supply systems, specifically engineered for noise-prone environments and partial-power-down architectures in automotive ECUs and industrial PLCs.

FAQ

What is the maximum supported data rate for TXU0102DTMR in a 3.3 V to 5.0 V translation configuration?

The TXU0102DTMR supports up to 200 Mbps when translating from 3.3 V to 5.0 V, as specified in the official datasheet under "Features." This performance is validated across the full operating temperature range (–40°C to +125°C) and enables reliable high-speed UART, SPI, and JTAG communication without signal degradation. Propagation delay remains ≤8 ns under these conditions.

Does TXU0102DTMR support level translation in both directions (A-to-B and B-to-A) simultaneously?

No, TXU0102DTMR is a fixed-direction translator: data flows unidirectionally either from A-port to B-port or B-port to A-port, determined by OE logic state and supply configuration-not simultaneously. Direction is set at design time via VCCA/VCCB assignment and OE control. For true bidirectional operation per channel, TI recommends TXU0202DTMR instead.

Can the OE pin of TXU0102DTMR be driven from the VCCB domain when VCCA = 1.2 V and VCCB = 3.3 V?

Yes, the OE pin of TXU0102DTMR accepts logic-high input referenced to either VCCA or VCCB, as confirmed in the "Description" and "Pin Functions" sections of the datasheet. When VCCA = 1.2 V and VCCB = 3.3 V, OE may be driven directly from the 3.3 V domain without level shifting-eliminating external components and simplifying control routing in mixed-voltage systems.

What is the typical input hysteresis (ΔVT) of TXU0102DTMR when operating with VCCA = 1.8 V?

At VCCA = 1.8 V, the TXU0102DTMR exhibits a typical input hysteresis (ΔVT) of 0.3 V to 0.55 V, as documented in Section 7.5 "Electrical Characteristics" of the datasheet. This hysteresis ensures reliable rejection of noise and slow input edges, making the device ideal for interfacing with mechanical switches or noisy sensor outputs without external filtering.

How does the Ioff-float feature of TXU0102DTMR behave when VCCA is disconnected and VCCB remains at 3.3 V?

When VCCA is disconnected (or falls below 100 mV) while VCCB remains at 3.3 V, the Ioff-float feature forces all outputs (B1Y, B2Y) into high-impedance state, and leakage current is limited to ≤2.5 µA over –40°C to +125°C. This prevents back-driving or contention on the B-side bus, enabling safe power sequencing and partial-power-down operation-critical in automotive and industrial systems with staggered supply activation.