Texas Instruments TXB0102YZPR

Overview

TXB0102YZPR from Texas Instruments is a 2-bit bidirectional voltage-level translator with auto direction sensing, supporting 1.2 V to 3.6 V on the A port and 1.65 V to 5.5 V on the B port (VCCA ≤ VCCB), ±15-kV HBM ESD protection on the B port, 4-µA max ICC, and Ioff partial-power-down capability. It enables low-voltage interconnect between mixed-supply domains in space-constrained mobile interfaces.

For engineers reviewing the TXB0102YZPR datasheet, TXB0102YZPR pinout, TXB0102YZPR application, or TXB0102YZPR equivalent, this page delivers verified electrical specs, NanoFree™ DSBGA-8 package details, real-world timing performance across voltage combinations, and validated alternatives for handheld and embedded interface design.

Technical Context

The TXB0102YZPR implements auto-sensing bidirectional translation without external direction control, using internal weak pullup/pulldown networks to detect signal flow. Its dual-rail architecture isolates A-port logic (VCCA-referenced) from B-port logic (VCCB-referenced), enabling translation between 1.2-V/1.5-V/1.8-V/2.5-V/3.3-V and 5-V domains while enforcing VCCA ≤ VCCB.

It features VCC isolation: if either VCCA or VCCB is at GND, all outputs enter high-impedance state. The OE input is referenced to VCCA and must be pulled low via ≥50-kΩ resistor during power-up to ensure safe 3-state initialization. Ioff circuitry blocks current backflow during partial power-down, protecting downstream circuitry.

Key Specifications

Pinout & Package

TXB0102YZPR uses Texas Instruments' NanoFree™ DSBGA-8 package (0.90 mm × 1.80 mm), where the silicon die serves as the package substrate - minimizing footprint and thermal resistance (RθJA = 105.8°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0102YZPR, TXS0102YZPR trades VCC isolation and low ICC for enhanced I²C compatibility, while SN74AVC2T244YZPR sacrifices auto-direction and B-port voltage flexibility for tighter timing control in fixed-direction applications - making TXB0102YZPR optimal for compact, mixed-supply, high-ESD environments.

Availability

TXB0102YZPR is available at Aetrix Electronics and suitable for smartphone, tablet, and embedded controller applications requiring stable component supply, long-term manufacturability, and consistent DSBGA-8 packaging.

Supply support for TXB0102YZPR 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 TXB0102YZPR belongs to TI's voltage translation portfolio, engineered specifically for ultra-compact, low-power, mixed-voltage interconnect in portable and space-constrained systems.

FAQ

What is the maximum allowable voltage difference between VCCA and VCCB for reliable operation of TXB0102YZPR?

The TXB0102YZPR requires VCCA ≤ VCCB at all times, with absolute maximum ratings specifying VCCA ≤ 4.6 V and VCCB ≤ 6.5 V. Operation outside this constraint - including VCCA > VCCB - risks permanent damage due to internal clamp diode conduction and violates the device's translation architecture. Always verify supply sequencing to ensure VCCB powers up before or simultaneously with VCCA.

Can TXB0102YZPR translate between 5-V and 1.2-V logic without external components?

Yes, TXB0102YZPR natively supports 5-V B-port and 1.2-V A-port operation per its recommended conditions (VCCB = 5 V, VCCA = 1.2 V). It achieves this with internal level-shifting circuitry and auto-direction sensing - no external MOSFETs, resistors, or direction-control logic are needed. Data rates up to 20 Mbps are guaranteed under these conditions.

Does TXB0102YZPR require external pullup resistors on its I/O pins?

No - external pullup resistors are not recommended on TXB0102YZPR I/O pins. Its internal weak pullups are optimized for auto-direction sensing and may conflict with external resistors. If open-drain bus compatibility (e.g., I²C) is required, TI recommends TXS0102YZPR instead, which integrates stronger, configurable pullups.

How does the OE pin function in TXB0102YZPR, and what is the correct power-up sequence?

The OE pin in TXB0102YZPR is an active-low, VCCA-referenced enable that places all I/Os in high-impedance state when low. To prevent bus contention during power-up, OE must be tied to GND through a ≥50-kΩ pulldown resistor - not left floating or tied directly to VCCA. This ensures outputs remain disabled until both VCCA and VCCB stabilize.

Is TXB0102YZPR compatible with hot-swap or partial-power-down system architectures?

Yes - TXB0102YZPR supports partial-power-down via its Ioff feature, which disables outputs and blocks current backflow when either VCCA or VCCB is at 0 V. Combined with VCC isolation, this allows safe insertion/removal of modules powered from different rails, meeting JEDEC JESD78 Class II latch-up immunity requirements.