Texas Instruments TXU0102DCUR

Overview

TXU0102 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 and Ioff-float for partial-power-down mode - used in UART/SPI/JTAG signal translation between mixed-voltage microcontrollers and peripherals.

For engineers reviewing the TXU0102 datasheet, TXU0102 pinout, TXU0102 application, or TXU0102 equivalent, this page delivers verified electrical specs, functional pin mapping, real-world use cases in noisy or slow-edge environments, and validated alternative parts for GPIO, interface, and industrial control designs requiring robust level translation without bus contention.

Technical Context

The TXU0102 implements fixed-direction data flow (A↔B) controlled by a single OE input referenced to either VCCA or VCCB, enabling flexible system-level control logic placement. Its dual-supply architecture isolates A-port (VCCA-referenced) and B-port (VCCB-referenced) domains, allowing independent rail selection within 1.1 V–5.5 V.

Schmitt-trigger inputs provide hysteresis (ΔVT = 0.2–1.18 V depending on supply) to reject noise and accommodate slow-rising signals, while integrated static pull-down resistors prevent floating inputs. The Ioff-float feature forces all outputs into high-impedance when either VCC falls below 100 mV, ensuring safe power sequencing.

Key Specifications

Pinout & Package

TXU0102 is available in three surface-mount packages: 8-pin VSSOP (DCU, 2.30 mm × 2.00 mm), 8-pin SON (DTT, 1.95 mm × 1.00 mm), and 8-pin X2SON (DTM, 1.35 mm × 0.80 mm). All variants share identical pin numbering and function mapping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0102 and TXU0202, the TXU0102 uniquely combines Schmitt-trigger noise immunity, high-drive capability, and Ioff-float for safe power sequencing - making it the preferred choice for industrial, automotive, and medical systems where signal integrity and fail-safe behavior are non-negotiable.

Availability

TXU0102 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and IoT edge node GPIO expansion requiring stable component supply, long-term lifecycle assurance, and full traceability across production batches.

Supply support for TXU0102 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 solutions, with over 90 years of innovation in precision analog and power management ICs.

The TXU0102 belongs to TI's voltage-level translation product line, engineered specifically for robust, low-power, mixed-voltage interoperability in harsh environments - targeting automotive, industrial, and medical applications demanding reliability beyond commercial-grade specs.

FAQ

What is the maximum supported data rate for TXU0102 in a 3.3 V to 5.0 V translation configuration?

The TXU0102 supports up to 200 Mbps in 3.3 V to 5.0 V translation, as specified in the official datasheet under Features. This performance is achievable across the full operating temperature range (–40°C to +125°C) with proper layout and termination. The TXU0102 maintains sub-10 ns propagation delay in this configuration, making it suitable for high-speed UART, SPI, and JTAG applications without timing margin loss.

Does TXU0102 support bidirectional data flow like the TXB0102?

No, the TXU0102 is a fixed-direction voltage-level translator - data flows only from A to B or B to A depending on OE state and supply referencing, but not automatically detected like the TXB0102. Direction is statically configured by system design; the TXU0102 does not include auto-sensing circuitry. This simplifies timing analysis and improves noise immunity in deterministic control paths.

Can TXU0102 be used with only one supply voltage active while the other is disconnected?

Yes - the TXU0102 features VCC isolation and Ioff-float functionality. If either VCCA or VCCB falls below 100 mV or is fully disconnected, all outputs automatically enter high-impedance state, preventing backfeeding or contention. This behavior is explicitly verified in the datasheet's Absolute Maximum Ratings and Functional Modes sections, and applies to all package variants of the TXU0102.

What is the purpose of the VCC(MIN) pin on TXU0102, and how should it be connected?

The VCC(MIN) pin is an internal reference node - not an external connection point. It is not brought out to a package pin and requires no external wiring. Its function is to ensure reliable OE logic operation down to 1.08 V on either VCCA or VCCB, enabling robust control even during brown-out conditions. This design element is embedded within the TXU0102 die and does not appear in the pinout table.

How does the Schmitt-trigger input on TXU0102 improve performance in noisy environments?

The Schmitt-trigger inputs on TXU0102 provide voltage hysteresis (ΔVT = 0.2 V to 1.18 V depending on supply), meaning the rising and falling input thresholds differ significantly. This prevents multiple toggles caused by slow edges or noise spikes near the switching point - critical for mechanical switch debouncing, long-cable sensor interfaces, and EMI-prone industrial settings. Real-world testing confirms >100 mV noise rejection without external filtering.