Texas Instruments TXV0106BQBR

Overview

TXV0106BQBR from Texas Instruments is a 6-bit fixed-direction dual-rail voltage translator optimized for RGMII 2.0 interfaces between Ethernet MACs and PHYs, supporting 1.2 V–3.6 V on both A- and B-ports, ≤ ±400 ps channel-to-channel skew, and 390 ps peak-to-peak jitter at 1.8 V–3.3 V. It enables low-skew redriving in automotive ADAS domain controllers and rack server motherboards.

For engineers reviewing the TXV0106BQBR datasheet, TXV0106BQBR pinout, TXV0106BQBR application, or TXV0106BQBR equivalent, key selection criteria include RGMII 2.0 timing compliance (≤750 ps rise/fall time, ≤±5% duty cycle distortion), Ioff partial-power-down support, VCC isolation, integrated 10 Ω damping resistor, and 12 mA drive strength at 3.6 V.

Technical Context

The TXV0106BQBR implements a symmetric dual-supply architecture where A-port I/Os (A1–A6, OE) are referenced to VCCA and B-port I/Os (B1–B6) to VCCB, enabling bidirectional voltage translation across independent rails. Its fixed A→B directionality and OE-controlled high-impedance mode support asynchronous power sequencing in multi-MAC/PHY systems.

It integrates balanced CMOS push-pull outputs with 10 Ω series damping to suppress reflections, meets RGMII 2.0 skew and jitter requirements at 250 Mbps, and features VCC isolation that forces all I/Os into high-impedance when either VCCA or VCCB drops below 100 mV or floats-preventing backflow during partial power-down.

Key Specifications

Pinout & Package

TXV0106BQBR is housed in a 16-pin WQFN package (BQB) measuring 3.5 mm × 2.5 mm with exposed thermal pad (recommended grounded). Pin numbering follows top-view layout with OE referenced to VCCA and all I/Os electrically isolated per supply rail.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74AVC16T245DGGR and TXS0106EYZTR, TXV0106BQBR uniquely delivers RGMII 2.0–compliant skew and jitter with integrated damping and VCC isolation-making it the only option among the three qualified for automotive and server-grade Ethernet timing-critical deployments.

Availability

TXV0106BQBR is available at Aetrix Electronics and suitable for ADAS domain controllers, rack server motherboards, HVAC controllers, and machine vision cameras requiring stable component supply, long-term lifecycle support, and guaranteed RGMII 2.0 timing compliance.

Supply support for TXV0106BQBR 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 solutions, with decades of expertise in high-reliability interface ICs for automotive, industrial, and communications markets.

The TXV0106BQBR belongs to TI's precision voltage translation portfolio, engineered specifically for timing-critical Ethernet interfaces-including RGMII, RMII, and SGMII-where low skew, low jitter, and robust power sequencing are mandatory.

FAQ

What is the maximum supported data rate for TXV0106BQBR while maintaining RGMII 2.0 compliance?

The TXV0106BQBR supports up to 250 Mbps per channel while meeting all RGMII 2.0 timing specifications-including ≤±400 ps channel-to-channel skew, ≤±5% duty cycle distortion, and <750 ps rise/fall time. Although it operates up to 500 Mbps in non-RGMII configurations, full compliance requires limiting to 250 Mbps with 5 pF load and RGMII input transition rates ≤2 ns/V. TXV0106BQBR's switching characteristics tables (Sections 5.7–5.9) confirm this under CL = 5 pF and 250 Mbps conditions.

Does TXV0106BQBR support bidirectional data translation?

No, TXV0106BQBR is a fixed-direction translator operating exclusively from A-port (input) to B-port (output). The device functional table explicitly defines A→B flow only; there is no internal path or configuration to reverse signal direction. For bidirectional applications, alternatives like SN74AVC16T245DGGR must be considered-but they lack TXV0106BQBR's RGMII 2.0 timing guarantees and integrated damping.

How does the VCC isolation feature function in TXV0106BQBR during power sequencing?

TXV0106BQBR's VCC isolation forces all I/Os into high-impedance when either VCCA or VCCB drops to ≤100 mV or floats-preventing current backflow between asynchronously powered domains. This behavior is verified in the Electrical Characteristics table (Ioff ≤3.6 µA) and Functional Block Diagram (Figure 7-1). During startup, tying OE to VCCA via pullup ensures outputs remain disabled until both rails stabilize, making TXV0106BQBR ideal for multi-MAC/PHY systems with staggered power-up.

What is the purpose of the integrated 10 Ω resistor in TXV0106BQBR?

The integrated 10 Ω series damping resistor in TXV0106BQBR reduces signal reflections on fast-switching RGMII lines-particularly beneficial for short, unterminated PCB traces common in dense server and automotive modules. It lowers overshoot/ringing without requiring external components, though additional series resistance (e.g., 25–53 Ω depending on VCCB) is needed for full 50 Ω impedance matching. This design choice directly improves eye diagram integrity at 250 Mbps, as confirmed in Section 7.3.8 and Table 7-1.

Can TXV0106BQBR operate with mismatched supply voltages such as VCCA = 1.2 V and VCCB = 3.3 V?

Yes, TXV0106BQBR is fully specified for asymmetric dual-rail operation across the full 1.14 V–3.6 V range on each supply. Its datasheet explicitly validates performance at combinations including VCCA = 1.2 V / VCCB = 3.3 V (Section 5.6), delivering ≤4.5 ns propagation delay and ≤±450 ps skew. This flexibility enables direct interfacing between ultra-low-power sensors (1.2 V) and legacy 3.3 V PHYs without intermediate regulators or level shifters-reducing BOM count and board space.