Nexperia USA Inc. NXU0204BZZ

Overview

NXU0204BZZ from Nexperia is a 4-bit dual-supply voltage level translating buffer with Schmitt-trigger inputs and 3-state outputs, designed for bidirectional asynchronous bus translation between independent voltage domains (0.9 V to 5.5 V). It supports unidirectional data flow-A-to-B on three channels and B-to-A on one channel-with integrated IOFF protection, 250 Mbps max data rate (≥1.8 V), and 12 mA output drive at 5 V. Used in mixed-voltage I/O interfacing for UART, SPI, and JTAG in industrial embedded systems.

For engineers reviewing the NXU0204BZZ datasheet, NXU0204BZZ pinout, NXU0204BZZ application, or NXU0204BZZ equivalent, key selection considerations include dual-supply rail independence (VCCA/VCCB), Schmitt-trigger noise immunity for slow/noisy signals, suspend-mode behavior during partial power-down, IOFF-enabled backflow current prevention, and OE pin compatibility with either supply domain.

Technical Context

The NXU0204BZZ implements a fixed-direction translation architecture: A1/A2/YA3/YA4 are A-side I/O referenced to VCCA; YB1/YB2/B3/B4 are B-side I/O referenced to VCCB. Its Schmitt-trigger inputs feature 6.5 MΩ internal pull-down resistors and hysteresis (e.g., 0.96 V typical at 5.5 V), enabling robust operation with slow edges and noise up to ±10% VCCO overshoot/undershoot.

IOFF circuitry activates when either VCCA or VCCB drops below 100 mV or floats, forcing all outputs into high-impedance state without requiring power sequencing. The OE input is referenced to VCCA or VCCB via VCC(MIN) logic, allowing direct connection to either supply domain for seamless enable control during power-up/down transitions.

Key Specifications

Pinout & Package

DHXQFN14 package (SOT8014-1): 2 mm × 2 mm × 0.48 mm body, 0.4 mm pitch, 14 terminals, thermal-enhanced leadless construction with exposed thermal pad (GND(1), non-soldered by default).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NXU0104, NXU0204BZZ provides double channel density for compact multi-signal bridges; versus NXU0304, its Schmitt inputs deliver proven noise immunity in industrial settings where signal integrity cannot be assumed.

Availability

NXU0204BZZ is available at Aetrix Electronics and suitable for industrial automation controllers, automotive infotainment gateways, and medical diagnostic equipment requiring stable component supply across extended temperature ranges (-40 °C to +125 °C).

Supply support for NXU0204BZZ 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, reliable logic, discrete, and MOSFET solutions with leadership in efficiency, miniaturization, and robustness.

The NXU series targets mixed-voltage system interoperability - specifically engineered for seamless, low-power, noise-immune level translation in space-constrained, thermally demanding embedded applications.

FAQ

Can NXU0204BZZ translate between 0.9 V and 5.5 V simultaneously?

Yes. VCCA and VCCB may be set independently within 0.9 V to 5.5 V - for example, VCCA = 0.9 V (ultra-low-power sensor node) and VCCB = 5.5 V (legacy industrial actuator interface). The device maintains specified timing, drive strength, and IOFF protection across this full range without derating.

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

When VCCB floats or drops below 100 mV, the IOFF circuitry forces all outputs (YB1, YB2, YA3, YA4) into high-impedance state regardless of OE or input states. This prevents back-current from VCCA into the unpowered VCCB domain - a critical safety feature verified per JESD78D Class II latch-up testing.

Is external pull-up required on Schmitt-trigger inputs?

No. Each input includes a 6.5 MΩ internal pull-down resistor that ensures defined LOW state when un-driven. An external pull-up may be added if HIGH bias is needed, but must be ≤1 MΩ to avoid contention - confirmed by static current measurements showing II ≤ 2 μA across -40 °C to +125 °C.

How does OE behave during power-up sequences with mismatched VCCA/VCCB ramp rates?

OE is referenced to the active supply domain via VCC(MIN) logic, so it remains functional even if VCCA ramps before VCCB (or vice versa). When OE is left floating, the internal circuitry defaults to HIGH, enabling outputs only after both supplies stabilize above 100 mV - preventing glitch generation during asymmetric power sequencing.