Diodes Incorporated PI3USB4002AZUAEX

Overview

PI3USB4002AZUAEX from Diodes Incorporated is a differential bi-directional SPST USB 2.0 switch with ultra-low on-resistance (5 Ω typ), 1 GHz bandwidth, 7 pF on-capacitance, and integrated over-voltage protection (OVP) triggering at 4.75 V. It supports 2.7–5.5 V supply, operates from –40°C to +85°C, and protects C0+/C0− pins up to 24 V - deployed in USB-C smartphone charging circuits to safeguard host processors from VBUS surges.

For engineers reviewing the PI3USB4002AZUAEX datasheet, PI3USB4002AZUAEX pinout, PI3USB4002AZUAEX application, or PI3USB4002AZUAEX equivalent, key selection criteria include OVP threshold accuracy, differential insertion loss (<0.5 dB @240 MHz), off-isolation (–30 dB @240 MHz), crosstalk (–35 dB @240 MHz), and UQFN-10 (1.5×2 mm) package compatibility with high-density USB-C port layouts.

Technical Context

The PI3USB4002AZUAEX implements a single-pole, single-throw analog switch architecture optimized for USB 2.0 differential signaling. Its control logic responds to EN pin state to enable/disable signal path between C0± (connector side) and L0± (system side), with automatic OVP shutdown when C0± voltage exceeds 4.75 V.

It features dual-rail tolerance: C0± withstands up to 24 V, L0± up to 6 V, and VDD/EN/REF tolerate 6 V - enabling robust operation during hot-plug events and charger-induced transients. The REF pin requires a 1 µF/25 V decoupling capacitor tied to GND to stabilize internal biasing under overvoltage stress.

Key Specifications

Pinout & Package

Package: 10-pin UQFN (ZUA), 1.5 mm × 2.0 mm, 0.6 mm pitch, 0.5 mm height, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 2.0 over-voltage protection switch applications.

Compared with TS3USB30E and MAX14541E, the PI3USB4002AZUAEX delivers superior system-level robustness via monolithic 24 V-tolerant I/O, precise 4.75 V OVP, and UQFN-10 packaging - reducing component count, PCB area, and validation effort in USB-C consumer electronics.

Availability

PI3USB4002AZUAEX is available at Aetrix Electronics and suitable for smartphone USB-C charging protection, tablet high-voltage port interface, and notebook USB-A-to-C adapter designs requiring stable component supply and long-term lifecycle support.

Supply support for PI3USB4002AZUAEX 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and protection applications.

The PI3USB4002AZUAEX belongs to Diodes' Pericom USB protection switch product line, engineered specifically for high-reliability USB 2.0 interface hardening in consumer mobile devices facing aggressive fast-charging and ESD stress conditions.

FAQ

What is the maximum continuous voltage rating on the C0+ and C0− pins?

The C0+ and C0− pins are rated for continuous operation up to 24 V, as confirmed in the Absolute Maximum Ratings table of DS41994 Rev 1-2. This allows direct interfacing with USB-C Power Delivery sources without external clamping, and the integrated OVP activates at 4.75 V to protect downstream circuitry before reaching hazardous levels.

Does the PI3USB4002AZUAEX require an external reference capacitor on the REF pin?

Yes - a 1 µF ceramic capacitor rated for ≥25 V must be placed between REF and GND, located within 2 mm of the pin per layout guidelines. This capacitor stabilizes the internal OVP comparator reference and ensures accurate 4.75 V trip point under transient conditions; omission causes unreliable overvoltage response.

How does the device behave when EN is pulled high (VDD)?

When EN = VDD, the switch enters power-down mode: all channels go to Hi-Z, C0± to L0± leakage drops to <1 µA, and OVP remains active but cannot trigger channel disablement since the switch is already open. This state minimizes standby current while preserving surge protection readiness.

Can the PI3USB4002AZUAEX support USB 2.0 high-speed (480 Mbps) signaling without distortion?

Yes - its 1 GHz bandwidth, 0.25 ns propagation delay, <0.5 dB insertion loss at 240 MHz, and –35 dB crosstalk ensure full compliance with USB 2.0 high-speed eye diagram requirements. Measurement data in DS41994 confirms open eye patterns at 480 Mbps with standard FR-4 PCB traces up to 8 cm.