Nexperia USA Inc. NXU0304BZZ

Overview

NXU0304BZZ 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 0.9 V–5.5 V domains. It supports unidirectional A→B (3 channels) and B→A (1 channel) data flow, features integrated 6.5 MΩ pull-down resistors on all inputs, and delivers 12 mA output drive at 5 V. It enables robust UART/SPI/JTAG interface bridging in mixed-voltage embedded systems.

For engineers reviewing the NXU0304BZZ datasheet, NXU0304BZZ pinout, NXU0304BZZ application, or NXU0304BZZ equivalent, key selection criteria include its dual-rail IOFF protection, ±2500 V HBM ESD rating, 250 Mbps max data rate (≥1.8 V → 5 V), suspend-mode behavior under <100 mV supply, and compatibility with JEDEC standards JESD8-12 through JESD12-6.

Technical Context

The NXU0304BZZ implements independent Schmitt-trigger input stages with VT+ and VT− thresholds that scale with supply voltage (e.g., VT+ = 3.03 V, VT− = 2.07 V at VCCA = VCCB = 5.5 V), enabling noise immunity for slow or noisy signals. Its VCC(MIN) circuitry allows OE to be referenced to either VCCA or VCCB domain without external level-shifting.

IOFF protection activates when either VCCA or VCCB drops below 100 mV or floats, forcing all outputs into high-impedance state and blocking backflow current. No power supply sequencing is required, and output glitches are suppressed during power-up/down transitions due to synchronized internal state control.

Key Specifications

Pinout & Package

DHXQFN14 package (SOT8014-1): 2 mm × 2 mm × 0.48 mm body, 0.4 mm pitch, 14 terminals, thermal pad (non-soldered or floating GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NXU0104 and NXU0204, the NXU0304BZZ uniquely combines 4-bit width, 3-state control, dual-rail IOFF, and Schmitt-trigger noise immunity - making it the sole option for robust, scalable, mixed-voltage bus bridging in production-grade embedded systems.

Availability

NXU0304BZZ is available at Aetrix Electronics and suitable for UART interface bridging, SPI bus translation, JTAG debug port adaptation, and noisy industrial I/O expansion requiring stable component supply across automotive, industrial control, and consumer electronics programs.

Supply support for NXU0304BZZ 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.

The NXU0304 belongs to Nexperia's dual-supply level translation product line, engineered specifically for seamless interoperability between heterogeneous voltage domains in resource-constrained embedded systems.

FAQ

Can NXU0304BZZ translate between 0.9 V and 5.5 V simultaneously?

Yes. VCCA and VCCB can be independently set from 0.9 V to 5.5 V, enabling direct translation between any two nodes in that range - e.g., 0.9 V microcontroller I/O to 5.5 V industrial sensor interface. The device maintains specified timing, drive strength, and noise immunity across the full range without external components.

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

When VCCB floats or drops below 100 mV, the device enters suspend mode: all outputs (YB1–YB3, YA4) go high-impedance, and IOFF circuitry blocks backflow current from VCCA into the unpowered B-side. This protects downstream 5.5 V circuitry from unintended biasing or latch-up.

Is an external pull-up resistor required on OE for reliable startup?

No. OE can be left floating or pulled low to GND - the internal VCC(MIN) circuit ensures it defaults to LOW during power-up, placing outputs in high-impedance state until firmware asserts OE HIGH. External pull-up is unnecessary and may conflict with domain-referenced logic levels.

How does the Schmitt-trigger input improve performance in noisy environments?

The Schmitt-trigger provides 0.96 V typical hysteresis at 5.5 V (scaling linearly down to ~0.25 V at 0.9 V), ensuring clean, bounce-free logic transitions even with slow-rising signals (<1 V/μs) or superimposed noise >100 mV peak-to-peak - eliminating false triggering in motor-control or RF-adjacent layouts.