Nexperia USA Inc. NXS0104BQX

Overview

NXS0104BQX from Nexperia is a 4-bit dual-supply bidirectional voltage-level translating transceiver with auto-direction sensing and open-drain I/O architecture. It enables seamless interfacing between 1.8 V, 2.5 V, 3.3 V, and 5.0 V domains (VCC(A): 1.65–3.6 V; VCC(B): 2.3–5.5 V), features IOFF partial power-down protection, operates from –40 °C to +125 °C, and supports up to 24 Mbps data rate in push-pull mode - deployed in smartphone I²C bus expansion and tablet peripheral voltage translation.

For engineers reviewing the NXS0104BQX datasheet, NXS0104BQX pinout, NXS0104BQX application, or NXS0104BQX equivalent, this page delivers verified functional architecture, validated thermal performance across DHVQFN14 package variants, confirmed auto-direction timing behavior under asymmetric supply conditions, and real-world design constraints for open-drain bus translation including one-shot pulse duration limits and pull-up resistor interaction.

Technical Context

The NXS0104BQX implements a switch-type voltage translator using pass-gate NMOS (T3) biased at ~VTH above the lower-rail supply, enabling bidirectional conduction without external direction control. Its internal edge-rate accelerator employs one-shot triggered PMOS drivers (T1/T2) to reduce rising-edge transition time by bypassing 10 kΩ on-die pull-ups during output transitions.

IOFF circuitry disables outputs when either VCC(A) or VCC(B) is at GND, preventing backflow current during partial power-down. The device requires no power sequencing: VCC(A) may exceed VCC(B) during ramp-up, but must not exceed it during steady-state operation per datasheet constraint (VCC(A) ≤ VCC(B)).

Key Specifications

Pinout & Package

DHVQFN14 (SOT762-1) package: plastic dual in-line compatible thermal enhanced very thin quad flat package; 14 terminals; body 2.5 × 3 × 0.85 mm; exposed thermal pad (non-electrical, floating or GND-connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0104 and NXB0104, the NXS0104BQX uniquely balances auto-direction capability, 24 Mbps performance, and IEC61000-4-2 ESD robustness - making it optimal for space-constrained, multi-voltage I²C systems where pin count and layout simplicity are critical.

Availability

NXS0104BQX is available at Aetrix Electronics and suitable for smartphone peripheral interface, tablet I²C bus expansion, and industrial sensor hub interface requiring stable component supply across automotive-grade temperature ranges and long-term production continuity.

Supply support for NXS0104BQX 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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with global R&D and manufacturing facilities focused on reliability and energy efficiency.

The NXS0104 belongs to Nexperia's auto-direction voltage translation product line, engineered specifically for low-pin-count, low-power I²C and 1-Wire bus bridging in portable and embedded systems where supply rail independence and ESD resilience are essential.

FAQ

Can NXS0104BQX translate between 1.8 V and 5.0 V without external components?

Yes. With VCC(A) = 1.8 V and VCC(B) = 5.0 V, the device operates within its specified supply ranges and leverages internal 10 kΩ pull-ups on both sides. No external resistors are needed for basic I²C functionality, though system-level pull-up sizing must still meet bus capacitance and speed requirements per I²C specification.

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

The datasheet explicitly prohibits VCC(A) > VCC(B) in active operation. Doing so risks latch-up or accelerated wear due to reverse-biased junctions in the pass-gate structure. The device tolerates VCC(A) ≥ VCC(B) only during power-up ramp; steady-state operation must maintain VCC(A) ≤ VCC(B) at all times.

How does the one-shot circuit affect PCB layout for high-speed use?

The one-shot pulse duration (~50 ns) imposes trace-length limits: round-trip signal reflection delay must stay within this window to prevent re-triggering. For FR-4, keep A/B side traces ≤ 75 mm (≈1 ns/inch × 50 ns / 2). Avoid stubs and use controlled-impedance routing to minimize capacitive loading beyond 15 pF.

Is OE pin compatible with 1.2 V logic controllers?

No. OE is referenced to VCC(A), so its VIH threshold is 0.65 × VCC(A). With minimum VCC(A) = 1.65 V, VIH = 1.07 V - insufficient for reliable recognition of 1.2 V HIGH signals. OE must be driven from a logic source operating at ≥1.65 V, such as the same domain as VCC(A).