Texas Instruments TXS0102DCTTG4

Overview

TXS0102DCTTG4 from Texas Instruments is a 2-bit bidirectional voltage-level translator for mixed-voltage I/O interfacing, supporting 1.65V–3.6V on A-port and 2.3V–5.5V on B-port with no direction-control signal required. It delivers up to 24Mbps push-pull and 2Mbps open-drain data rates, features integrated 10kΩ pull-ups per I/O, and enables I²C/SMBus and GPIO level translation between 1.8V/2.5V/3.3V and 5V domains.

For engineers reviewing the TXS0102DCTTG4 datasheet, TXS0102DCTTG4 pinout, TXS0102DCTTG4 application, or TXS0102DCTTG4 equivalent, key selection criteria include VCCA ≤ VCCB compliance, OE-controlled high-impedance state during power sequencing, VCC isolation behavior, latch-up immunity (>100mA), and ESD robustness (±8kV HBM on B-port).

Technical Context

The TXS0102DCTTG4 employs auto-direction-sensing pass-gate architecture with edge-rate accelerator (one-shot) circuitry per channel, eliminating need for external direction control. Its N-channel topology sets gate bias ~1 VT above the lower supply rail, enabling seamless bidirectional translation without signal arbitration logic.

Each I/O includes integrated 10kΩ pull-up resistors referenced to its local supply (VCCA for A-port, VCCB for B-port), and the OE input-referenced to VCCA-controls global high-impedance mode. The device supports partial-power-down via Ioff and requires no power-supply sequencing due to independent VCCA/VCCB ramping tolerance.

Key Specifications

Pinout & Package

TXS0102DCTTG4 uses the DCT (SSOP-8) package: 2.95mm × 4mm body, 0.65mm pitch, surface-mount, moisture-sensitive level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0102DCTTG4, TXS0108E offers scalability at the cost of board area and power, while PCA9306 trades performance and integration for lower unit cost-making TXS0102DCTTG4 optimal for new designs requiring compact, high-speed, self-contained bidirectional translation.

Availability

TXS0102DCTTG4 is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and telecom infrastructure requiring stable component supply, long-term lifecycle assurance, and guaranteed traceability.

Supply support for TXS0102DCTTG4 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 50 years of innovation in precision analog and interface solutions.

The TXS0102DCTTG4 belongs to TI's Switch-type voltage translator family, engineered specifically for zero-latency, directionless level shifting in mixed-voltage digital systems-targeting I²C, SMBus, and GPIO applications where reliability and integration are critical.

FAQ

What is the maximum allowable voltage difference between VCCA and VCCB for reliable operation of TXS0102DCTTG4?

The TXS0102DCTTG4 requires VCCA ≤ VCCB at all times, with absolute limits of VCCA ≤ 3.6V and VCCB ≤ 5.5V. For example, VCCA = 3.3V and VCCB = 5.0V is valid, but VCCA = 3.6V and VCCB = 3.3V violates the constraint and may cause malfunction. This condition ensures correct gate-biasing of the internal pass transistors in the TXS0102DCTTG4.

Can TXS0102DCTTG4 translate signals between 1.8V and 5V without external components?

Yes. TXS0102DCTTG4 supports 1.8V on A-port (within 1.65V–3.6V) and 5V on B-port (within 2.3V–5.5V) simultaneously, with integrated 10kΩ pull-ups on both sides. No external resistors, direction logic, or level-shifting ICs are needed-enabling direct 1.8V↔5V translation in I²C or GPIO applications using only the TXS0102DCTTG4.

How does the OE pin behave during power-up, and what is the recommended tie-off for safe initialization?

The OE pin is active-high and referenced to VCCA. To ensure TXS0102DCTTG4 starts in high-impedance state during power-up, tie OE to GND via a pulldown resistor (e.g., 10kΩ). This prevents bus contention before VCCA stabilizes. The TXS0102DCTTG4 datasheet specifies that OE must be held low until both supplies are valid and stable.

Does TXS0102DCTTG4 support open-drain and push-pull topologies on the same I/O pair?

Yes. TXS0102DCTTG4 natively supports both: it translates open-drain signals (e.g., I²C) at up to 2Mbps and push-pull CMOS signals at up to 24Mbps. The internal architecture automatically adapts-using integrated pull-ups for open-drain and pass-gate conduction for push-pull-without configuration. This dual-mode capability is intrinsic to the TXS0102DCTTG4 design.

What thermal derating applies to TXS0102DCTTG4 in the DCT package at 85°C ambient?

In the DCT (SSOP-8) package, TXS0102DCTTG4 has RθJA = 168.5°C/W. At 85°C ambient and 24Mbps operation, junction temperature rise is ~2.8°C per mW of dissipation. With typical ICCA + ICCB ≈ 14.4µA and dynamic switching, total power remains well below 1mW-so no derating is required. Full-rated performance is maintained up to 85°C for TXS0102DCTTG4.