TXU0104DTRR

Overview

The TXU0104DTRR is a 4-bit, dual-supply noninverting fixed direction voltage-level translator manufactured by Texas Instruments. It operates with VCCA and VCCB supply voltages ranging from 1.08V to 5.5V. The device supports data rates up to 200Mbps when translating between 3.3V and 5.0V logic levels. It features Schmitt-trigger inputs for noise immunity and provides tri-state outputs. The component is housed in a 12-X2QFN (X2SON) package measuring 1.7mm x 1.0mm and is rated for an operating temperature range of -40°C to +125°C.

Feature Summary

• Dual-rail design allows independent configuration of A and B ports for flexible voltage translation.
• Schmitt-trigger inputs provide noise filtering capabilities for slow or noisy signal lines.
• Integrated Ioff-float feature disables outputs and creates high-impedance states if either supply voltage drops below 100mV.
• Control logic enables the Output Enable (OE) pin to be referenced to either VCCA or VCCB logic levels.

Applications

• Eliminating slow or noisy input signals in digital circuits
• Driving indicator LEDs or buzzers from low-voltage control logic
• Debouncing mechanical switches
• General purpose I/O level shifting between different voltage domains
• Push-pull level shifting for interfaces such as UART, SPI, and JTAG

Procurement Notes

Verify the specific ordering suffix 'DTRR' corresponds to the X2SON 12-pin package and tape-and-reel packaging format. Confirm that the active-high OE requirement matches the system design, as the TXUN0104 variant utilizes active-low control. Ensure ESD handling protocols are followed during assembly due to the sensitivity of CMOS inputs.

Selection Notes

Select this component when interfacing between logic families requiring bidirectional or unidirectional translation within the 1.1V to 5.5V range. The fixed direction architecture simplifies PCB layout compared to bi-directional alternatives. Consider the thermal resistance characteristics of the X2SON package for high-density applications where heat dissipation may be constrained.

Part Context

This part belongs to the TXU0104 family of voltage-level translators. It shares functional similarities with the TXB family but offers enhanced Schmitt-trigger performance. Alternative variants include TXU0204 and TXU0304 for different channel counts, while TXUN0104 provides the same functionality with inverted enable logic.

Replacement Considerations

Direct pinout-compatible substitutes include other members of the TXB family level shifters. Designers should verify electrical specifications and enable logic polarity when considering cross-family replacements.

FAQ

How does the Ioff-float feature protect the circuit?

If either VCCA or VCCB falls below 100mV or is disconnected, all outputs automatically enter a high-impedance state, preventing back-powering or undefined logic states during partial power-down scenarios.

What is the difference between TXU0104 and TXUN0104?

The primary difference is the Output Enable (OE) signal polarity; TXU0104 uses an active-high OE, whereas TXUN0104 uses an active-low OE. All other electrical characteristics remain identical.