Nexperia USA Inc. NXB0104PWJ

Overview

NXB0104 from Nexperia is a 4-bit dual-supply translating transceiver with auto-direction sensing and 3-state output control, enabling bidirectional voltage level translation between mismatched logic domains (e.g., 1.2 V ↔ 3.3 V or 1.8 V ↔ 5.0 V). It features independent A- and B-side supplies (VCC(A): 1.2–3.6 V; VCC(B): 1.65–5.5 V), IOFF partial power-down protection, and operates across −40 °C to +125 °C. Used in mixed-voltage system interconnects such as MCU-to-peripheral I²C/SPI bridges.

For engineers reviewing the NXB0104 datasheet, NXB0104 pinout, NXB0104 application, or NXB0104 equivalent, key selection criteria include its auto-direction architecture (no external DIR signal required), guaranteed 40 Mbps data rate at 3.3 V/5.0 V, IOFF-enabled safe power-down behavior, and TSSOP14/DHVQFN14/XQFN12 package options for space-constrained designs.

Technical Context

The NXB0104 implements an edge-triggered auto-direction architecture using internal one-shot circuits per channel to detect rising/falling edges on either port and dynamically enable the appropriate PMOS/NMOS output drivers-eliminating need for external direction control. Its weak-output design allows bus contention resolution without damage during bidirectional transitions.

Each I/O pair supports independent voltage referencing: An and OE are referenced to VCC(A); Bn pins to VCC(B). The device enforces VCC(A) ≤ VCC(B) during active operation but tolerates any power-up sequence. IOFF circuitry disables outputs and limits backflow current when either supply is at GND, meeting JESD78B Class II latch-up immunity (>100 mA).

Key Specifications

Pinout & Package

Package: TSSOP14 (SOT402-1), DHVQFN14 (SOT762-1), or XQFN12 (SOT1174-1). Pin functions are consistent across packages; TSSOP14 is used for pinout illustration.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply translating transceiver applications.

Compared with TXS0104E and SN74AVC4T245, the NXB0104 uniquely delivers auto-direction operation with IOFF protection-enabling simpler firmware, safer partial power-down, and reduced PCB routing-making it optimal for mixed-voltage embedded systems requiring robustness and minimal control overhead.

Availability

NXB0104 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ADAS sensor hubs, IoT edge node MCU-peripheral interconnects, and medical device mixed-voltage subsystems requiring stable component supply across extended temperature ranges.

Supply support for NXB0104 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, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.

The NXB series targets next-generation voltage translation needs in resource-constrained embedded systems, emphasizing auto-direction intelligence, ultra-low power, and rugged operation across automotive and industrial temperature grades.

FAQ

Can NXB0104 translate between 1.2 V and 5.0 V logic levels?

Yes. VCC(A) supports 1.2 V to 3.6 V and VCC(B) supports 1.65 V to 5.5 V, enabling direct 1.2 V ↔ 5.0 V translation. Input tolerance up to 5.5 V on both ports ensures compatibility regardless of supply voltage, and the auto-direction architecture maintains signal integrity without external control.

Does NXB0104 require power supply sequencing during startup?

No. The device tolerates any power-up order: VCC(A) may ramp before, after, or simultaneously with VCC(B). During power-up, if either supply is absent, IOFF circuitry automatically places outputs in high-impedance state-preventing bus contention or latch-up without external supervision.

What is the maximum capacitive load the NXB0104 can drive reliably?

The NXB0104 is characterized for loads up to 15 pF on A-side and 30 pF on B-side at 10 MHz. For heavier loads (>20 pF), trace length must be minimized to keep round-trip reflection delay within the one-shot pulse duration (~8–10 ns), otherwise signal overshoot or re-triggering may occur. Use short, impedance-controlled traces and avoid stubs.

How does the auto-direction sensing work without a DIR pin?

Each I/O channel contains edge-detecting one-shot circuits that monitor rising/falling transitions on An or Bn. A detected edge activates corresponding PMOS (for low-to-high) or NMOS (for high-to-low) drivers for a fixed duration (~8 ns), enabling instantaneous direction resolution. No clock, state machine, or external signal is involved-operation is purely analog and asynchronous.