Nexperia USA Inc. NXB0102UNZ

Overview

NXB0102UNZ from Nexperia is a 2-bit dual-supply bidirectional voltage-level translating transceiver with auto-direction sensing and 3-state output control, enabling seamless interfacing between 1.2 V–3.6 V (A-side) and 1.65 V–5.5 V (B-side) domains. It features independent VCC(A) and VCC(B) supplies, IOFF partial power-down protection, and operates across −40 °C to +125 °C. Used in mixed-voltage SoC-to-peripheral interconnects such as 1.8 V FPGA I/O to 3.3 V sensor bus.

For engineers reviewing the NXB0102UNZ datasheet, NXB0102UNZ pinout, NXB0102UNZ application, or NXB0102UNZ equivalent, key selection criteria include auto-direction operation without external control, guaranteed 70 Mbps data rate at 5.0 V B-side, IOFF-enabled safe power sequencing, and WLCSP8 package suitability for space-constrained portable electronics.

Technical Context

The NXB0102UNZ implements edge-triggered one-shot circuitry on both A and B ports to autonomously detect data flow direction and enable corresponding output drivers-no external DIR signal required. Its weak-output architecture allows overdriving during bus contention while maintaining defined static levels when idle.

Each channel integrates PMOS/NMOS acceleration transistors (T1–T4) activated by rising/falling edges, delivering typical output impedances of 70 Ω (1.2–1.8 V), 50 Ω (1.8–3.3 V), or 40 Ω (3.3–5.0 V). The OE input is referenced to VCC(A), and IOFF circuitry ensures <±2 μA power-off leakage when either supply is off.

Key Specifications

Pinout & Package

Package: WLCSP8 (SOT8023-1), 0.75 × 1.55 × 0.60 mm, wafer-level chip-scale with 8 solder bumps. Pin 1 indicator located below marking code in lower-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0102DCUR and SN74AVC2T244RSWR, NXB0102UNZ uniquely delivers auto-direction sensing plus IOFF in a WLCSP8 package-enabling smaller footprints, safer power sequencing, and zero-firmware bus bridging where direction changes dynamically.

Availability

NXB0102UNZ is available at Aetrix Electronics and suitable for mobile sensor hubs, automotive body controllers, FPGA peripheral bridges, and wearable health monitors requiring stable component supply across extended temperature ranges and compact packaging.

Supply support for NXB0102UNZ 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

Nexperia is a global semiconductor expert focused on essential efficiency-enhancing components, with leadership in logic, discrete, and MOSFET technologies for automotive, industrial, and consumer markets.

The NXB series targets high-speed, low-power bidirectional level translation in space- and power-constrained applications-designed specifically for mixed-voltage SoC interconnects where auto-direction sensing eliminates control overhead.

FAQ

What is the maximum allowable voltage difference between VCC(A) and VCC(B)?

VCC(A) must always be ≤ VCC(B) during normal operation per datasheet Section 7 and Table 4. Absolute maximum ratings allow both supplies up to +6.5 V, but functional operation requires VCC(A) ≤ VCC(B) to ensure correct one-shot triggering and output driver biasing. Exceeding this violates the device's architectural assumptions and may cause undefined direction detection or latch-up.

Can NXB0102UNZ translate between 1.2 V and 5.0 V simultaneously?

Yes. With VCC(A) = 1.2 V and VCC(B) = 5.0 V, the device supports bidirectional translation at up to 70 Mbps (Table 10) and meets all static specifications including VIH/VIL thresholds and VOH/VOL levels. Input tolerance up to 5.5 V on B-side pins ensures robustness when driven from 5.0 V sources.

Does the WLCSP8 package require special PCB layout considerations?

Yes. Per Section 12.4, trace lengths must limit round-trip reflection delay to within the one-shot pulse duration (~8–17 ns depending on VCC). Use short, controlled-impedance traces (<10 mm), avoid stubs, and minimize total capacitive load (<15 pF) to prevent incomplete rail transitions and re-triggering. Solder mask-defined pads and 0.3 mm solder mask dams are recommended for reliability.

How does IOFF behavior differ from standard 3-state disable?

IOFF actively disables output drivers and clamps leakage to ±2 μA even when one supply is fully powered down (e.g., VCC(A) = 0 V, VCC(B) = 5.0 V), preventing back-current into a powered-down domain. Standard 3-state only places outputs in high-Z but does not suppress leakage through internal ESD diodes-making IOFF critical for safe partial power-down in battery-backed or modular systems.