Diodes Incorporated PI3USB223ZMEX

Overview

PI3USB223ZMEX from Diodes Incorporated is a single-pole double-throw (SPDT) analog switch integrating USB 2.0 high-speed (480 Mbps) and stereo audio signal paths on shared pins, supporting dual-mode Type-C or micro-USB connectors. It features 2.5 Ω typical on-resistance, 1500 MHz -3 dB bandwidth for USB path, 0.02% THD+N for audio, and operates from +2.7V to +4.4V supply across –40°C to +85°C.

For engineers reviewing the PI3USB223ZMEX datasheet, PI3USB223ZMEX pinout, PI3USB223ZMEX application, or PI3USB223ZMEX equivalent, this device enables space-constrained mobile accessories requiring seamless switching between USB data and analog audio without external multiplexing or level-shifting circuitry.

Technical Context

The PI3USB223ZMEX implements gate-pump and substrate-pump architectures to maintain low R_ON (<5 Ω) across ±2 V audio signals while preserving USB 2.0 signal integrity up to 240 MHz. Its VBUS detection input (Pin 9) and ASEL override (Pin 8) enable automatic or manual path selection between D+/D− and L/R signal pairs.

It integrates internal shunt resistors on audio paths to suppress click-and-pop artifacts during switching, and provides robust protection: no leakage occurs when D+/R or D−/L are shorted to VBUS-even with VDD = 0 V-ensuring system-level reliability in portable charging/audio docking scenarios.

Key Specifications

Pinout & Package

PI3USB223ZMEX is housed in a 10-pin Ultra-thin Quad Flat No-Lead (UQFN) package measuring 1.4 mm × 1.8 mm with 0.4 mm pitch (ZM10 footprint). Pin 1 is marked by a laser-etched dot adjacent to the top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB/audio multiplexer applications.

Compared with TS3USB221ERUAR and MAX14502EWC+, the PI3USB223ZMEX uniquely combines USB 2.0–optimized bandwidth, ±2 V audio support, integrated VBUS detection, and click/pop suppression in a 1.4 × 1.8 mm UQFN-making it the only single-chip solution for true dual-mode USB-C audio/data accessories.

Availability

PI3USB223ZMEX is available at Aetrix Electronics and suitable for smartphone docking stations, USB-C audio adapters, multi-mode charging cables, and portable media hubs requiring stable component supply and guaranteed long-term sourcing.

Supply support for PI3USB223ZMEX 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance, energy-efficient components for consumer, computing, industrial, and communications markets.

The PI3USB223 belongs to Diodes' Pericom USB and audio interface product line, designed specifically for space-constrained mobile accessories requiring seamless coexistence of USB 2.0 data and high-fidelity analog audio on shared physical interfaces.

FAQ

What is the maximum allowable voltage on the R and L pins?

The R and L pins support analog input voltages from –2.0 V to (VDD + 0.3 V), enabling direct connection to headphone amplifiers delivering ±2 V peak-to-peak signals without clamping or distortion. This range is verified per DC Electrical Characteristics Table on page 4 of DS42160 Rev 1-3, with junction temperature limited to +150°C under continuous operation.

Does PI3USB223ZMEX require external pull-up or pull-down resistors on ASEL or VBUS?

No external resistors are required: ASEL has an internal 3 MΩ pull-down resistor, and VBUS is a high-impedance CMOS input with VIH ≥ 3.5 V and VIL ≤ 0.6 V. The internal pull-down ensures default USB path selection when ASEL is left unconnected, simplifying layout in cost-sensitive designs.

Can PI3USB223ZMEX operate with VDD = 0 V while VBUS is present?

Yes-the device guarantees no leakage current flows from D+/R or D−/L to VBUS when VDD = 0 V, as confirmed in the "Features" section and DC Electrical Characteristics table (ID+/R and D−/L(OFF) = 5 µA max at VDD = 0 V). This protects downstream USB transceivers during battery-dead or power-loss conditions.

How does the break-before-make timing prevent signal corruption?

The 13.5 µs break-before-make interval ensures complete disconnection of the inactive path before connecting the active one, eliminating momentary shorts between USB D+/D− and audio L/R lines. This prevents bus contention, data packet loss, and audible transients-verified in Figure 3 of DS42160 Rev 1-3 using 50 Ω//35 pF test loads.