Texas Instruments TXB0106IPWRQ1

Overview

TXB0106IPWRQ1 from Texas Instruments is an automotive-qualified 6-bit bidirectional voltage-level translator with auto-direction sensing, supporting 1.2V–3.6V on A port and 1.65V–5.5V on B port (VCCA ≤ VCCB), ±10kV HBM ESD protection on B port, VCC isolation, and Ioff partial-power-down capability. It enables reliable level translation between mixed-voltage domains in vehicle telematics and radar subsystems.

For engineers reviewing the TXB0106IPWRQ1 datasheet, TXB0106IPWRQ1 pinout, TXB0106IPWRQ1 application, or TXB0106IPWRQ1 equivalent, key selection criteria include its auto-sensing bidirectional operation without direction control, guaranteed high-impedance state during power sequencing, ±10kV B-port ESD rating, and qualification per AEC-Q100 Grade 2 (–40°C to +105°C ambient).

Technical Context

The TXB0106IPWRQ1 implements a buffered, edge-rate-accelerated architecture with one-shot circuits per I/O pair to enhance transition speed-reducing propagation delay to as low as 0.5ns (B→A) at 3.3V/5V and enabling up to 100 Mbps data rates. Its auto-direction sensing relies on weak output drivers that are overdriven by external sources, eliminating need for external direction control logic.

VCC isolation ensures all outputs enter high-impedance when either VCCA or VCCB = GND; OE is referenced to VCCA and supports pulldown resistor biasing for robust power-up behavior. Ioff circuitry prevents backflow current during partial power-down, meeting automotive system-level safety requirements.

Key Specifications

Pinout & Package

TXB0106IPWRQ1 is available in TSSOP-16 (5.00mm × 4.40mm) and WQFN-16 (3.50mm × 2.50mm) packages. Both variants share identical pin numbering and function mapping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0106EIPWRQ1 and SN74AVC4T245QPWRQ1, TXB0106IPWRQ1 uniquely combines auto-direction sensing, edge-rate acceleration, and AEC-Q100 qualification - making it optimal for space-constrained, high-speed, push-pull automotive interfaces where minimizing control signals and maximizing noise immunity are critical.

Availability

TXB0106IPWRQ1 is available at Aetrix Electronics and suitable for telematics control units, radar signal processing bridges, and heating/cooling system controllers requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.

Supply support for TXB0106IPWRQ1 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 automotive ICs, with decades of experience delivering high-reliability solutions for mission-critical systems.

The TXB0106IPWRQ1 belongs to TI's automotive-qualified level translation portfolio, designed specifically for robust, low-complexity voltage domain bridging in ADAS, body electronics, and infotainment subsystems.

FAQ

What is the maximum allowable voltage difference between VCCA and VCCB for stable operation of TXB0106IPWRQ1?

The TXB0106IPWRQ1 requires VCCA ≤ VCCB at all times. While VCCA may be as low as 1.2V and VCCB as high as 5.5V, the absolute difference is not constrained beyond this inequality. However, exceeding recommended operating conditions (e.g., VCCA = 1.2V with VCCB = 5.5V) may reduce noise margin and increase propagation delay - TI specifies performance across validated combinations such as 1.8V/3.3V and 3.3V/5V.

Does TXB0106IPWRQ1 support I²C or other open-drain protocols?

No, TXB0106IPWRQ1 does not support open-drain protocols like I²C. Its architecture is optimized for push-pull CMOS logic only. Attempting to use it on I²C buses risks bus contention and signal corruption due to lack of open-drain emulation. For I²C translation, TI recommends the TXS0106EIPWRQ1, which is explicitly designed for open-drain compatibility.

How does the OE pin behave during power-up, and what is the recommended biasing method for TXB0106IPWRQ1?

The OE pin of TXB0106IPWRQ1 is referenced to VCCA and must be held low during power-up to ensure all I/Os remain in high-impedance until both supplies stabilize. TI recommends tying OE to GND through a pulldown resistor; minimum value depends on the driver's sourcing capability but is typically ≥10 kΩ. This prevents undefined states and avoids glitches on connected buses.

What thermal performance can be expected from TXB0106IPWRQ1 in TSSOP-16 package under continuous 100 Mbps operation?

In TSSOP-16 (PW), TXB0106IPWRQ1 has RθJA = 107.5°C/W. At full 100 Mbps with typical 3.3V/5V supplies and 50% duty cycle, total supply current is ~38.5 μA, resulting in negligible self-heating (<0.5°C rise). Thermal design focus should prioritize PCB copper area under the thermal pad (for WQFN) or exposed pad soldering (for TSSOP) to maintain junction temperature within –40°C to +125°C limits.

Can TXB0106IPWRQ1 translate between 1.2V and 5V logic without external components?

Yes, TXB0106IPWRQ1 natively supports 1.2V (A port) to 5V (B port) translation with no external resistors or direction logic required. Its auto-sensing architecture and rail-to-rail input thresholds allow direct connection - provided VCCA ≤ VCCB and OE is properly biased. No level-setting resistors, pull-ups, or capacitors are needed for basic operation.