Texas Instruments TXS0104EPWR

Overview

TXS0104EPWR from Texas Instruments is a 4-bit bidirectional voltage-level translator IC designed for open-drain and push-pull logic interfaces between mismatched voltage domains. It supports 1.65–3.6 V on the A port and 2.3–5.5 V on the B port (VCCA ≤ VCCB), delivers up to 24 Mbps in push-pull mode, requires no direction-control signal, and operates across –40°C to +85°C - enabling interoperability between 1.8-V microcontrollers and 3.3-V/5-V peripherals in portable electronics.

For engineers reviewing the TXS0104EPWR datasheet, TXS0104EPWR pinout, TXS0104EPWR application, or TXS0104EPWR equivalent, key selection criteria include its dual-rail supply independence, OE-controlled high-impedance state, IEC 61000-4-2 ±8-kV contact ESD rating on the B port, and compatibility with NanoFree™ TSSOP-14 packaging for space-constrained PCB layouts.

Technical Context

The TXS0104EPWR implements an auto-direction-sensing architecture using internal pass-gate transistors and weak pull-up/pull-down networks, eliminating external direction control. Its OE input is referenced solely to VCCA, allowing independent power sequencing of VCCA and VCCB without functional disruption.

It supports both open-drain (2 Mbps max) and push-pull (24 Mbps max) signaling modes per channel, with propagation delays as low as 2.4 ns (A-to-B, VCCA = 3.3 V, VCCB = 3.3 V, push-pull) and channel-to-channel skew under 1 ns - critical for timing-sensitive I²C, SMBus, and GPIO bridging applications.

Key Specifications

Pinout & Package

Packaged in a 14-pin TSSOP (PW) with 5 mm × 6.4 mm footprint and 0.65-mm lead pitch, the TXS0104EPWR uses surface-mount gull-wing leads compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC4T245PWR and PCA9306DCUR, the TXS0104EPWR uniquely combines auto-direction sensing, OE-enabled 3-state, dual-mode (push-pull/open-drain) operation, and industry-leading B-port ESD robustness - making it the optimal choice for portable and mixed-signal embedded systems requiring flexible, reliable voltage translation.

Availability

TXS0104EPWR is available at Aetrix Electronics and suitable for mobile handset design, industrial sensor interface modules, and USB-C power delivery subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TXS0104EPWR 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 power management and signal chain solutions.

The TXS0104EPWR belongs to TI's voltage translation portfolio, engineered specifically for seamless interoperability between heterogeneous voltage domains in portable, industrial, and automotive electronics - emphasizing low power, small size, and robust ESD immunity.

FAQ

What is the maximum allowable voltage difference between VCCA and VCCB for reliable operation of the TXS0104EPWR?

The TXS0104EPWR requires VCCA ≤ VCCB at all times, with no minimum difference specified. The absolute maximum ratings allow VCCA as low as 1.65 V and VCCB as high as 5.5 V - meaning up to 3.85 V differential is permitted. However, proper logic threshold alignment depends on VCCA and VCCB values meeting recommended operating conditions (e.g., VCCA ≥ 1.65 V, VCCB ≥ 2.3 V). Exceeding VCCA > VCCB risks latch-up or damage, so strict adherence to VCCA ≤ VCCB is mandatory in the TXS0104EPWR design.

Can the TXS0104EPWR be used to translate I²C signals between a 1.8-V microcontroller and a 5-V EEPROM?

Yes, the TXS0104EPWR is explicitly validated for I²C bus bridging in open-drain mode. With VCCA = 1.8 V and VCCB = 5 V, it supports the 2 Mbps maximum open-drain data rate and meets I²C timing requirements including rise/fall time and hold time. Its ±8-kV IEC 61000-4-2 contact ESD rating on the B port protects the 5-V side from system-level ESD events - a key requirement for robust I²C implementations in the TXS0104EPWR application space.

Does the TXS0104EPWR require external pull-up resistors on the A or B ports?

Yes, external pull-up resistors are required on both A and B ports when used in open-drain configurations such as I²C. The TXS0104EPWR does not integrate pull-ups; its internal circuitry relies on external resistors to establish valid high logic levels. Typical values range from 1.8 kΩ (for 5-V, 100-kHz I²C) to 10 kΩ (for 1.8-V, 400-kHz I²C), selected based on bus capacitance and speed. Pull-ups must connect to their respective supply rails (VCCA for A-port, VCCB for B-port) - a critical design rule for correct TXS0104EPWR operation.

How does the OE pin function during power-up sequences where VCCA and VCCB ramp at different rates?

The OE pin of the TXS0104EPWR is referenced exclusively to VCCA, so it remains functional as soon as VCCA reaches valid logic thresholds (~0.35×VCCA for low, ~0.65×VCCA for high), regardless of VCCB status. If OE is tied to GND via a pull-down resistor during power-up, all outputs stay in high-impedance until VCCA stabilizes - preventing bus contention. This behavior is guaranteed by the TXS0104EPWR's architecture and eliminates the need for power-supply supervisors or sequencers in most designs.

Is the TXS0104EPWR pin-compatible with other devices in the TXS010x family, such as the TXS0102 or TXS0108E?

No, the TXS0104EPWR is not pin-compatible with TXS0102 (2-bit, 8-pin) or TXS0108E (8-bit, 20-pin) variants. While all share the same functional architecture and package options (e.g., TSSOP), the TXS0104EPWR uses a 14-pin TSSOP footprint with specific pin assignments for four A/B pairs, OE, VCCA, VCCB, and GND. Substituting with a different channel count requires PCB redesign. Always verify pin mapping against the exact TXS0104EPWR datasheet before layout - mechanical compatibility does not imply electrical or pinout compatibility.