Nexperia USA Inc. NXS0102UNZ

Overview

NXS0102 from Nexperia is a 2-bit dual-supply auto-sensing bidirectional voltage-level transceiver with open-drain I/O, supporting VCC(A) = 1.65–3.6 V and VCC(B) = 2.3–5.5 V, enabling translation between 1.8 V, 2.5 V, 3.3 V, and 5.0 V domains. It features integrated 10 kΩ pull-ups per port, IOFF partial power-down protection, and operates across –40 °C to +125 °C. Used in I²C and 1-wire bus interfacing between mixed-voltage SoCs and peripherals.

For engineers reviewing the NXS0102 datasheet, NXS0102 pinout, NXS0102 application, or NXS0102 equivalent, key selection considerations include auto-direction sensing capability, push-pull data rate up to 24 Mbps, IOFF-enabled safe power sequencing, and package-specific thermal derating (e.g., WLCSP8: 7.2 mW/K above 115 °C).

Technical Context

The NXS0102 implements a switch-type architecture using pass-gate NMOS transistors biased at ~V_TH + VCC(A), eliminating external direction control. Its one-shot edge-acceleration circuit activates on input transitions crossing ~0.5×VCCI, delivering low output impedance (50–70 Ω) for ≤10 ns to accelerate rising edges on open-drain buses.

Internal 10 kΩ pull-up resistors are provided per I/O (A-side to VCC(A), B-side to VCC(B)), disabled when OE = LOW. The IOFF circuit ensures <±1 μA leakage during partial power-down, preventing backflow current when either supply is off - critical for hot-swap and battery-backed systems.

Key Specifications

Pinout & Package

Package: WLCSP8 (SOT8023-1), 0.75 × 1.55 × 0.60 mm, wafer-level chip-scale package with 8 solder bumps; suitable for space-constrained mobile and wearable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0102YZPR, NXS0102 provides integrated safety (IOFF) and reduced BOM (internal pull-ups); compared with NXB0102PW, it eliminates DIR pin routing and supports true open-drain protocols without external logic.

Availability

NXS0102 is available at Aetrix Electronics and suitable for smartphone baseband interfaces, industrial PLC I/O modules, automotive display controllers, and wearable sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for NXS0102 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 standard products including logic, discretes, MOSFETs, and ESD protection devices.

The NXS0102 belongs to Nexperia's auto-sensing level translation product line, engineered specifically for robust, low-component-count interfacing of open-drain buses (I²C, 1-wire) across mixed-voltage domains in mobile and automotive applications.

FAQ

Can NXS0102 translate between 1.2 V and 3.3 V?

No. VCC(A) minimum is 1.65 V per datasheet Table 6; 1.2 V falls outside the specified operating range. Attempting operation below 1.65 V risks unreliable pass-gate turn-on, increased propagation delay variation, and potential failure to meet VOL/VOH thresholds. For 1.2 V interfaces, consider dedicated ultra-low-voltage translators such as the NVT2002.

Is external pull-up resistance required when using NXS0102 on an I²C bus?

Not required - each A- and B-port pin includes an internal 10 kΩ pull-up to its respective supply rail. However, if faster rise times or stronger bus drive are needed (e.g., for >400 kHz I²C Fast-mode), external pull-ups may be added in parallel, though this lowers effective VOL and increases static current.

What happens if VCC(A) exceeds VCC(B) during normal operation?

The device is not guaranteed to function correctly: datasheet Section 8 Function Table footnote [1] and Section 10 note [2] explicitly require VCC(A) ≤ VCC(B) during active operation. Exceeding this violates the gate-bias design, risking incomplete pass-transistor turn-on, elevated VOL, and potential data corruption - power sequencing must enforce this constraint.

Does NXS0102 support hot-plug insertion when only VCC(B) is powered?

Yes - the IOFF circuit actively disables outputs and limits leakage to <±12 μA (Table 9) when VCC(A) = 0 V and VCC(B) is active. This prevents back-current from VCC(B) into the unpowered A-side logic, satisfying hot-plug safety requirements per JEDEC JESD78B Class II latch-up immunity and system-level IEC 61000-4-5 surge testing.