Nexperia USA Inc. NXS0101GMX

Overview

NXS0101 from Nexperia is a 1-bit dual-supply bidirectional voltage-level translating transceiver with auto-direction sensing and open-drain I/O, enabling seamless interfacing between 1.8 V, 2.5 V, 3.3 V, and 5.0 V domains. It features independent VCC(A) (1.65–3.6 V) and VCC(B) (2.3–5.5 V) supplies, integrated 10 kΩ internal pull-ups on both A and B ports, and IOFF circuitry for partial power-down protection. It is widely deployed in I²C and 1-wire bus translation within smartphone and tablet baseband subsystems.

For engineers reviewing the NXS0101 datasheet, NXS0101 pinout, NXS0101 application, or NXS0101 equivalent, key selection considerations include its auto-direction architecture (no external direction control required), guaranteed 24 Mbps data rate under push-pull drive, IOFF-enabled safe power sequencing, and support for -40 °C to +125 °C industrial operation across TSSOP6 (SOT363-2) and XSON6 (SOT886/SOT1202) packages.

Technical Context

The NXS0101 implements a switch-type translation architecture using an N-channel pass-gate transistor biased ~1 V_TH above VCC(A), coupled with dual one-shot edge accelerators that activate on input transitions crossing ~0.5×VCCI to reduce t_PLH/t_PHL. Its auto-direction sensing eliminates need for external DIR control signals, relying instead on transient current flow detection through internal bias networks.

Each port includes dedicated 10 kΩ internal pull-up resistors referenced to its respective supply (VCC(A) for A, VCC(B) for B), and the OE input-referenced to VCC(A)-asserts high-impedance OFF-state when LOW. The device enforces VCC(A) ≤ VCC(B) during operation but tolerates any power-up sequence without damage.

Key Specifications

Pinout & Package

XSON6 package (SOT886): plastic extremely thin small outline, no leads, 6-terminal, 1.0 × 1.45 × 0.5 mm body. Compatible with fine-pitch PCB assembly and space-constrained mobile applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional voltage translation applications.

Compared with TXS0101YZPR, NXS0101 offers integrated pull-ups and tighter VCC(A) min (1.65 V vs. 1.2 V) but narrower low-VCC headroom; compared with NXB0101GMX, it trades push-pull performance for native I²C readiness and automatic direction control.

Availability

NXS0101 is available at Aetrix Electronics and suitable for smartphone baseband interfaces, tablet sensor hubs, desktop SMBus bridges, and industrial handheld readers requiring stable component supply across automotive-grade temperature ranges and fine-pitch packaging.

Supply support for NXS0101 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, and energy-efficient components for automotive, industrial, computing, consumer, and communications markets.

The NXS0101 belongs to Nexperia's auto-direction voltage translator product line, engineered specifically for robust, low-component-count I²C and 1-wire level shifting in space- and power-constrained portable electronics.

FAQ

Can NXS0101 be used for SPI or UART level translation?

Yes, but only with push-pull drivers and careful attention to timing. The NXS0101 achieves 24 Mbps under push-pull conditions with ≤50 Ω source impedance; however, its one-shot edge accelerator is optimized for open-drain rise-time improvement, not push-pull symmetry. For dedicated high-speed push-pull translation, NXB0101GMX is recommended.

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

The device is not guaranteed to operate correctly if VCC(A) > VCC(B) during active use. The datasheet explicitly requires VCC(A) ≤ VCC(B) under operating conditions to ensure proper pass-gate biasing and avoid forward-biasing internal junctions. Violation may cause increased leakage, timing failure, or permanent damage.

Is an external pull-up resistor required when using internal 10 kΩ pull-ups?

No - the internal 10 kΩ pull-ups on both A and B ports are sufficient for standard I²C bus speeds up to 400 kHz. An external resistor is only needed if faster rise times or stronger pull-up strength (e.g., <10 kΩ) is required; adding it in parallel lowers effective resistance and reduces VOL, which must be verified against sink current limits.

How does the IOFF feature behave when only VCC(A) is powered?

When VCC(A) = 0 V and VCC(B) is active, the IOFF circuit disables the A-port output stage, limiting A-to-B leakage to ±2 μA maximum. This prevents back-current from VCC(B) into the unpowered A-side logic, satisfying JEDEC JESD78B Class II latch-up immunity requirements and enabling safe partial power-down.