Nexperia USA Inc. NXU0104BQX

Overview

NXU0104BQX from Nexperia is a 4-bit unidirectional dual-supply voltage level translating buffer with Schmitt-trigger inputs, 3-state outputs, and IOFF partial power-down protection. It translates data from A-side (VCCA = 0.9–5.5 V) to B-side (VCCB = 0.9–5.5 V), supports 250 Mbps max data rate at ≥1.8 V translation, features integrated 6.5 MΩ input pull-down resistors, and enables bus isolation via OE pin referenced to either supply domain. It is used in UART/SPI/JTAG I/O bridging between mixed-voltage SoC peripherals and sensors.

For engineers reviewing the NXU0104BQX datasheet, NXU0104BQX pinout, NXU0104BQX application, or NXU0104BQX equivalent, this page delivers verified electrical specs, thermal derating data, Schmitt-trigger threshold values (VT+ = 0.71–3.03 V, VT− = 0.33–2.07 V), IOFF leakage <2 µA during suspend mode, and package-specific R_th(j-a) (98 °C/W for DHVQFN14), enabling robust low-power voltage translation design in industrial and automotive control modules.

Technical Context

The NXU0104BQX implements asynchronous unidirectional level translation using independent A- and B-side supplies, with Schmitt-trigger inputs providing noise immunity for slow or noisy signals and built-in 6.5 MΩ static pull-downs preventing floating states. Its OE input accepts logic referencing either VCCA or VCCB, enabling flexible power sequencing.

IOFF circuitry actively blocks backflow current when either supply drops below 100 mV or floats, ensuring safe partial power-down operation without external isolation components. Output skew remains ≤0.7 ns across 1.1–5.5 V translation ranges, supporting high-speed timing-critical interfaces like SPI clock domains.

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: 2.5 × 3 × 0.85 mm body, 14-terminal leadless thermal-enhanced quad flat; exposed thermal pad (GND(1)) optional for soldering but electrically isolated unless connected to system ground.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply level translation applications.

Compared with NXU0204 and NXU0304, the NXU0104BQX uniquely combines ultra-low ICC (≤5 µA), guaranteed IOFF protection, and sub-40 ns propagation at 2.5–5.0 V supplies - making it optimal for power-sensitive, unidirectional, mixed-voltage industrial control links.

Availability

NXU0104BQX is available at Aetrix Electronics and suitable for UART bridging, SPI peripheral interfacing, JTAG debug port translation, and noisy industrial I/O expansion requiring stable component supply across automotive (-40 °C to +125 °C) and industrial temperature grades.

Supply support for NXU0104BQX 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 delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.

The NXU0104 belongs to Nexperia's dual-supply level translation product line, engineered specifically for robust, low-power, unidirectional voltage bridging in mixed-rail embedded systems with stringent power sequencing and ESD requirements.

FAQ

Can NXU0104BQX translate bidirectionally between two voltage domains?

No. The NXU0104BQX is strictly unidirectional: data flows only from A-side inputs (A1–A4) to B-side outputs (YB1–YB4). It lacks auto-direction sensing or bus-turnaround logic. For bidirectional translation (e.g., I²C), Nexperia's NXU0304 or PCA9306 are required alternatives.

What happens to outputs when VCCA is powered but VCCB is disconnected?

When VCCB is floating or drops below 100 mV, the device enters suspend mode: all YB1–YB4 outputs transition to high-impedance (Hi-Z) and IOFF circuitry limits leakage to ≤2 µA. This prevents back-driving the B-bus and protects downstream components.

Is the OE pin compatible with 1.2 V logic when VCCA = 1.2 V and VCCB = 3.3 V?

Yes. OE is referenced to the active supply domain (VCCA or VCCB) via internal VCC(MIN) circuitry. At VCCA = 1.2 V, OE logic thresholds are scaled accordingly: VIH ≈ 0.89 V and VIL ≈ 0.50 V (typ.), ensuring reliable activation with 1.2 V GPIO.

Does the DHVQFN14 package require soldering the exposed thermal pad?

No. The exposed pad (GND(1)) has no electrical requirement to be soldered. If soldered, it must remain electrically floating or be connected to system GND - never left biased. Thermal performance improves by ~15% when thermally anchored to a 200 mm² copper pour.