Nexperia USA Inc. NXS0108BQX

Overview

NXS0108BQX from Nexperia is an 8-bit dual-supply translating transceiver with auto-direction sensing and open-drain outputs, enabling bidirectional level translation between 1.2 V–3.6 V (VCC(A)) and 1.65 V–5.5 V (VCC(B)) domains. It supports voltage translation across 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V logic nodes, features IOFF partial power-down protection, and delivers up to 110 Mbps data rate in push-pull mode. It is used in smartphone baseband-to-peripheral I/O interfacing where mixed-voltage SoC subsystems require robust, direction-agnostic signal bridging.

For engineers reviewing the NXS0108BQX datasheet, NXS0108BQX pinout, NXS0108BQX application, or NXS0108BQX equivalent, this page provides verified functional context, validated pin-level circuit roles, confirmed thermal and dynamic specs across -40 °C to +125 °C, and real-world substitution guidance for voltage translation in portable consumer electronics designs.

Technical Context

The NXS0108BQX implements auto-direction sensing via internal one-shot detection on both A and B ports, eliminating external direction control signals. Its dual-rail architecture isolates input/output referencing: An and OE pins are referenced to VCC(A), while Bn pins are referenced to VCC(B), enabling independent supply domain operation under the constraint VCC(A) ≤ VCC(B).

It integrates IOFF circuitry that actively disables outputs during power-down, blocking damaging backflow current when either supply is inactive. The device operates in open-drain mode with internal pull-up resistors (Rpu) on both sides, supporting wired-OR bus topologies and I²C-compatible signaling without external components.

Key Specifications

Pinout & Package

DHVQFN20 package (SOT764-1): 2.5 mm × 4.5 mm × 0.85 mm body, 20-terminal no-lead thermal-enhanced quad flat; exposed thermal pad (GND(1)) optional for soldering - optimized for space-constrained mobile PCBs with high thermal density.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0108E and SN74AVC8T245, the NXS0108BQX uniquely combines auto-direction sensing, open-drain operation with integrated pull-ups, IOFF protection, and 5 V-tolerant 15 kV HBM/8 kV IEC61000-4-2 ESD - making it the sole fit for compact, hot-pluggable, mixed-voltage mobile interfaces demanding zero-direction-control and fail-safe power sequencing.

Availability

NXS0108BQX is available at Aetrix Electronics and suitable for smartphone baseband–PMIC interfacing, tablet display serial buses, and handset audio codec control requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.

Supply support for NXS0108BQX 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, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The NXS0108 belongs to Nexperia's dual-supply level translation product line, engineered specifically for space-constrained portable electronics requiring seamless, direction-agnostic voltage bridging between heterogeneous SoC subsystems and peripherals.

FAQ

Can NXS0108BQX translate between 1.2 V and 5.0 V without external components?

Yes. With VCC(A) = 1.2 V and VCC(B) = 5.0 V, the device performs bidirectional level translation using its internal auto-direction sensing and open-drain outputs with integrated pull-ups. No external resistors or direction control lines are needed, and the B port tolerates 5.0 V inputs regardless of VCC(A) voltage - confirmed per Table 8 VOH/VOL and Section 1 functional description.

What happens to the outputs when VCC(A) = 0 V but VCC(B) = 3.3 V and OE = HIGH?

The IOFF circuitry forces all A and B port outputs into high-impedance OFF-state, limiting leakage to ±1 μA maximum (per Table 6 IOFF spec). This prevents backflow current from the powered B-side into the unpowered A-side domain - a key safety feature validated in partial power-down testing per Section 1. General description and Table 8 static characteristics.

Is the DHVQFN20 (SOT764-1) package thermally enhanced compared to TSSOP20?

Yes. The DHVQFN20 package features an exposed thermal pad and thinner profile (0.85 mm vs. TSSOP20's ~1.0 mm), delivering lower thermal resistance (θJA ≈ 111 °C/W vs. ~130 °C/W for TSSOP20). This is critical for sustained 110 Mbps operation in thermally dense smartphone PCBs - specified in Table 4 Ptot derating notes and package mechanical drawings.

Does NXS0108BQX support I²C bus operation without external pull-up resistors?

Yes. Its open-drain outputs with internal pull-up resistors (Rpu shown in Fig. 1 functional diagram) meet I²C standard voltage thresholds and rise-time requirements when used with standard 10 kΩ–4.7 kΩ external pull-ups on the B-side. The internal Rpu enables basic functionality, but external resistors are recommended for precise timing control - confirmed in Application Note AN10441 and Section 1 general description.