NXP Semiconductors NCX8193GUX

Overview

NCX8193GUX from NXP Semiconductors is an audio jack accessory detector and controller IC designed for reliable 3-pole and 4-pole plug insertion detection using fault-detection logic. It integrates a microphone bias path switch (RON = 0.9 Ω typ. at 2.8 V), Send/End button detection (780 mV trigger), and low-THD (0.01%) analog pass-through for headset applications in smartphones and portable media devices.

For engineers reviewing the NCX8193GUX datasheet, NCX8193GUX pinout, NCX8193GUX application, or NCX8193GUX equivalent, key selection considerations include its false-detection prevention architecture, J_DET voltage thresholding (400 mV detect / 300 mV confirmation), EN-controlled microphone path switching, and XQFN10 package compatibility with space-constrained mobile PCB layouts.

Technical Context

The NCX8193GUX implements a two-stage plug detection algorithm: J_DET is first pulled up via a 1.2 MΩ resistor; when voltage drops below 400 mV, the pull-up is disabled and a variable current source engages. Sustained J_DET < 300 mV triggers DET = LOW. Button press detection on J_MIC operates independently with a fixed 780 mV reference and supports forward/reverse/call-end event encoding.

Its dual-supply architecture separates core logic (VCC, 2.4–5.25 V) from I/O interface (VCC(IO), 1.6–VCC), enabling codec-side bias control and minimizing interference between detection logic and analog audio paths. The device maintains < 25 µA active-mode supply current and achieves −100 dB OFF-state isolation and −110 dB PSRR for clean microphone signal routing.

Key Specifications

Pinout & Package

XQFN10 (SOT1160-2) package: plastic extremely thin quad flat no-lead, 1.8 mm × 1.4 mm × 0.5 mm body, 10-terminal layout optimized for high-density mobile PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar audio jack detection and configuration applications.

Compared with MAX14525ETA+ and TPS65987D, the NCX8193GUX delivers dedicated, GPIO-native plug/button detection in the smallest footprint (1.8 × 1.4 mm), with no firmware overhead and guaranteed moisture-resistant operation - making it optimal for cost-sensitive, space-constrained mobile audio interfaces.

Availability

NCX8193GUX is available at Aetrix Electronics and suitable for smartphone headset interfaces, tablet accessory hubs, wearable media players, and USB-C audio adapters requiring stable component supply and long-term production continuity.

Supply support for NCX8193GUX 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and mobile applications.

The NCX8193GUX belongs to NXP's audio interface and accessory detection product line, engineered specifically to replace discrete detection circuits in portable consumer electronics with high-reliability, low-power, and small-footprint integrated solutions.

FAQ

What is the primary function of the NCX8193GUX in a mobile device design?

The NCX8193GUX serves as a dedicated audio jack accessory detector and controller, performing plug insertion detection for 3-pole and 4-pole connectors, managing microphone bias path switching via the EN pin, and detecting Send/End button presses on TRRS headsets. Its core value lies in replacing multiple discrete components with a single IC that ensures robust false-detection prevention and low-THD analog signal integrity - all within the NCX8193GUX's XQFN10 package.

How does the NCX8193GUX prevent false detection due to moisture or partial insertion?

The NCX8193GUX employs a two-stage voltage validation process on the J_DET pin: initial detection occurs at 400 mV, but DET only asserts LOW after sustained voltage remains below 300 mV. This hysteresis-based method rejects transient dips caused by moisture bridging or intermittent contact. The NCX8193GUX also features a programmable 40 ms unplug delay and adaptive current-source ramping to further suppress false triggers - confirmed in its functional description and Table 8 threshold specifications.

What are the supply voltage requirements for the NCX8193GUX, and why are there two separate supplies?

The NCX8193GUX requires two independent supplies: VCC (2.4–5.25 V) for core logic and detection circuitry, and VCC(IO) (1.6 V to VCC) for I/O interface and microphone bias control. This separation isolates noise-sensitive analog paths from digital switching noise, enables flexible codec-side bias voltage scaling, and allows the NCX8193GUX to operate correctly even when VCC(IO) is lower than VCC - a critical feature for mixed-voltage mobile SoC interfaces.

Can the NCX8193GUX support both 3-pole and 4-pole headset configurations, and how is this achieved?

Yes, the NCX8193GUX natively supports both 3-pole (TRS) and 4-pole (TRRS) headset configurations through its J_DET and J_MIC pins, which sense jack topology via resistance and voltage divider behavior. Its detection algorithm adapts to different pole counts by monitoring J_DET voltage transitions and validating against defined thresholds (400 mV/300 mV). The NCX8193GUX datasheet explicitly states this capability in Section 1 and confirms compatibility with "a broad variety of after-market headphones" - including both configurations.

What is the significance of the 780 mV reference voltage in the NCX8193GUX's button detection circuit?

The 780 mV reference voltage is the precise threshold used by the NCX8193GUX to detect button presses on the J_MIC line. When a headset button closes a resistive path, J_MIC voltage rises above this level, causing the S/E output to assert HIGH. The specification guarantees ±62 mV tolerance (718–842 mV) across temperature, ensuring reliable detection across diverse button designs and battery voltages. This hardware-level threshold eliminates software debounce and makes the NCX8193GUX's button response deterministic and low-latency.