Diodes Incorporated PI3USB4002AQ1ZUAEX

Overview

PI3USB4002AQ1ZUAEX from Diodes Incorporated is an automotive-grade, ultra-high-voltage-protection USB 2.0 SPST analog switch with 1 GHz bandwidth, 5 Ω typical on-resistance, 7 pF on-capacitance, and AEC-Q100 Grade 1 qualification. It routes D+/D− signals between USB-C connector (C0±) and host processor (L0±), enabling robust overvoltage protection in vehicle infotainment and telematics systems.

For engineers reviewing the PI3USB4002AQ1ZUAEX datasheet, PI3USB4002AQ1ZUAEX pinout, PI3USB4002AQ1ZUAEX application, or PI3USB4002AQ1ZUAEX equivalent, key selection criteria include its 24 V C0± tolerance, 4.75 V OVP trigger, -30 dB off-isolation at 240 MHz, EN-controlled power-down mode, and UQFN-10 (1.5 × 2.0 mm) automotive package.

Technical Context

The PI3USB4002AQ implements a single-pole, single-throw (SPST) differential switch architecture with integrated overvoltage protection logic that triggers at 4.75 V on C0± pins. Its control path uses a CMOS EN input to enable/disable conduction between L0± and C0±, while REF pin requires a 1 µF/25 V decoupling capacitor tied to GND for stable biasing.

Signal integrity is maintained via matched differential paths with 0.25 ns typical propagation delay, ≤20 ps bit-to-bit skew, and <0.5 dB insertion loss at 240 MHz. The device operates across -40°C to +125°C with supply voltage from 2.7 V to 5.5 V, supporting USB 2.0 eye diagram compliance under automotive thermal and ESD stress conditions.

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 high-voltage protection switch applications.

Compared with TS3USB30E and MAX14534A, the PI3USB4002AQ1ZUAEX uniquely integrates 24 V C0± tolerance, 4.75 V OVP with sub-1 µs response, AEC-Q100 Grade 1 rating, and 125°C operation-enabling single-chip USB 2.0 protection in safety-critical automotive domains without external components.

Availability

PI3USB4002AQ1ZUAEX is available at Aetrix Electronics and suitable for automotive infotainment, telematics gateways, and rear-seat entertainment systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for PI3USB4002AQ1ZUAEX 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 ICs, specializing in high-performance, high-reliability solutions for automotive, industrial, and computing markets.

The PI3USB4002AQ belongs to Diodes' Pericom USB protection switch product line, designed specifically for automotive USB-C interfaces requiring integrated overvoltage protection, ESD resilience, and AEC-Q100 qualification.

FAQ

What is the function of the REF pin, and why is a capacitor required?

The REF pin provides internal bias reference for the overvoltage protection circuitry. A 1 µF/25 V ceramic capacitor must be placed between REF and GND, as specified in the datasheet, to stabilize the 4.75 V OVP threshold and prevent false triggering during voltage transients. Placement must be within 2 mm of the pin with low-inductance routing.

Does PI3USB4002AQ1ZUAEX support USB 2.0 high-speed (480 Mbps) signaling without signal degradation?

Yes. With 1 GHz bandwidth, <0.5 dB insertion loss at 240 MHz, and 0.25 ns propagation delay, the device fully complies with USB 2.0 high-speed eye diagram requirements. Measured crosstalk (-35 dB) and return loss (-15 dB) confirm minimal signal distortion across the full operating temperature range.

How does the OVP feature respond when C0+ reaches 20 V while the device is enabled?

When C0+ or C0− exceeds 4.75 V, the internal OVP circuit disables the switch within 1 µs (typical), forcing L0± into high-impedance state. During this event, leakage current remains ≤1 mA, and the device sustains no damage - verified per AEC-Q100 stress testing up to 24 V continuous exposure.

Can PI3USB4002AQ1ZUAEX be used in non-automotive applications such as industrial docking stations?

Yes. Its -40°C to +125°C operation, 24 V C0± tolerance, and robust ESD performance make it suitable for industrial environments with wide temperature swings and uncontrolled power sources. The AEC-Q100 qualification adds reliability assurance but does not restrict usage to automotive systems.