Nexperia USA Inc. NXB0108PWJ

Overview

NXB0108PWJ from Nexperia is an 8-bit dual-supply bidirectional voltage-level translating transceiver with auto-direction sensing and 3-state output control. It enables seamless interface between 1.2 V–3.6 V (A-side) and 1.65 V–5.5 V (B-side) domains, supports ±2 mA input drive, features IOFF partial power-down protection, and operates across −40 °C to +125 °C - used in mixed-voltage SoC-to-peripheral interconnects.

For engineers reviewing the NXB0108PWJ datasheet, NXB0108PWJ pinout, NXB0108PWJ application, or NXB0108PWJ equivalent, key selection criteria include auto-direction operation without external control, VCC(A) ≤ VCC(B) constraint, 40–70 Ω dynamic output impedance, 60 Mbps max data rate at 25 °C, and TSSOP20 package thermal derating above 100 °C.

Technical Context

The NXB0108 employs edge-detecting one-shot circuits on both A and B ports to autonomously enable directionally appropriate drivers during signal transitions - no external DIR pin required. Its weak-output architecture allows bus contention resolution by external strong drivers, with typical output impedance scaling from 70 Ω (VCCO = 1.2–1.8 V) to 40 Ω (VCCO = 3.3–5.0 V).

IOFF circuitry actively disables outputs when either VCC(A) or VCC(B) is at GND, limiting backflow current to ±2 μA over full temperature range. Input thresholds track VCCI/2, and OE is referenced solely to VCC(A), requiring pull-down to GND for safe power-up sequencing.

Key Specifications

Pinout & Package

TSSOP20 package (SOT360-1), 4.4 mm body width, 0.65 mm pitch, 1.1 mm max height; thermally rated for 500 mW at ≤100 °C with 10.0 mW/K derating above.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NXS0108PWJ, NXB0108PWJ delivers autonomous direction control and higher speed but excludes open-drain support; versus TXB0108PWR, it achieves significantly lower B-port supply current at 5 V while maintaining identical voltage ranges and thermal specs.

Availability

NXB0108PWJ is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ADAS sensor hubs, server baseboard management, and medical imaging data links requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for NXB0108PWJ 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 high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The NXB series targets mixed-voltage system integration, delivering auto-direction translators optimized for low-power, high-ESD, and extended-temperature operation in space-constrained embedded designs.

FAQ

Can NXB0108PWJ translate between 1.2 V and 5.0 V domains?

Yes - VCC(A) may be set to 1.2 V (min) while VCC(B) is set to 5.0 V (within 1.65–5.5 V range). The device guarantees 0.4 V VOL and VCCO − 0.4 V VOH on both sides across temperature, ensuring valid logic levels. Input tolerance up to 5.5 V on all pins further supports this configuration.

Is power-up sequencing required for NXB0108PWJ?

No strict sequencing is required: either VCC(A) or VCC(B) may ramp first without damage. However, OE must be held LOW (via pull-down resistor) until both supplies stabilize to prevent undefined I/O states. The internal power-on reset ensures safe initialization regardless of ramp order.

Why does NXB0108PWJ not support I²C or 1-Wire protocols?

Its push-pull outputs lack open-drain capability, and its minimum 50 kΩ recommended pull-up resistance violates I²C's 2.2 kΩ–10 kΩ standard. The NXS0108PWJ is Nexperia's designated alternative for these protocols, featuring true open-drain outputs and integrated bus arbitration.

What is the impact of exceeding VCC(A) > VCC(B) during operation?

Operation with VCC(A) > VCC(B) violates the absolute maximum rating and risks latch-up or accelerated wear. The datasheet explicitly prohibits this condition during active use. Power-up exceptions are allowed, but runtime enforcement must be implemented via system-level supply monitoring or hardware interlocks.