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Home > Products > Integrated Circuits (ICs) > Interface > Analog Switches, Multiplexers, Demultiplexers

Diodes Incorporated PI3USB3031XUAEX

Name: PI3USB3031XUAEX
Brand: Diodes Incorporated
SKU: PI3USB3031XUAEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI3USB3031XUAEX

Manufacturer:: Diodes Incorporated

Category:: Analog Switches, Multiplexers, Demultiplexers

Package:: 12-XFQFN

Datasheet:: PI3USB3031XUAEX.pdf

Description:: USB2 SWITCH X2-QFN1616-12 T&R 3.

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Product details

Overview

PI3USB3031XUAEX from Diodes Incorporated is a 2-channel, 1:3 USB 2.0 and MHL/MyDP analog multiplexer/demultiplexer IC supporting simultaneous high-speed signal routing across three differential paths (USB1, USB2, MHL) to a shared D+/D− pair. It delivers 6.5 GHz bandwidth, 4.5 Ω typical R_ON for USB paths and 5.5 Ω for MHL, with 1.8 V–5.5 V supply operation and 1.8 V-compatible SEL inputs. It enables single-connector mobile docking in smartphones and portable instrumentation.

For engineers reviewing the PI3USB3031XUAEX datasheet, PI3USB3031XUAEX pinout, PI3USB3031XUAEX application, or PI3USB3031XUAEX equivalent, key selection criteria include its dual-protocol (USB 2.0 + MHL Rev. 3.0) switching capability, 12-pin X2-QFN 1.6 mm × 1.6 mm package, IOFF protection at V_CC = 0 V, overvoltage tolerance up to 5.0 V on all I/O pins, and 28 µA typical supply current.

Technical Context

The PI3USB3031XUAEX implements a digitally controlled 2:1 analog switch matrix per channel, with independent MHL/MyDP and two USB 2.0 differential paths routed to common D+/D− terminals via SEL0/SEL1 logic. Its architecture supports concurrent high-frequency signal integrity: 6.5 GHz –3 dB bandwidth applies identically to both USB and MHL paths, and R_ON flatness remains ≤1 Ω across 0–3.3 V I/O swing.

It integrates power-off protection (IOFF), ensuring <±10 µA leakage when V_CC = 0 V, and overvoltage tolerance (OVT) allowing I/O pins to withstand up to 5.0 V regardless of V_CC state. Control inputs accept 1.8 V logic directly, eliminating level shifters in mobile SoC interfacing.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.8 V to 5.5 V - Enables direct interface with 1.8 V, 3.3 V, and 5 V system rails without external regulators.
Bandwidth (–3 dB)	6.5 GHz - Supports full USB 2.0 (480 Mbps) and MHL Rev. 3.0 (up to 6 Gbps) signal fidelity with minimal insertion loss.
R_ON (USB)	4.5 Ω typical - Low on-resistance minimizes voltage drop and signal distortion on D+/D− paths during active switching.
R_ON (MHL)	5.5 Ω typical - Optimized for higher-voltage MHL differential signaling while maintaining impedance matching.
I_OFF (V_CC = 0 V)	±10 µA max - Ensures complete signal isolation and zero-power-state compatibility in battery-backed or hot-swap systems.
OVT Rating	5.0 V on all I/O - Eliminates need for external clamping diodes when interfacing with legacy or mixed-voltage peripherals.
ESD Protection	2 kV HBM, 1 kV CDM - Meets IEC 61000-4-2 Level 2 requirements for handheld and portable equipment robustness.

Pinout & Package

PI3USB3031XUAEX uses a 12-pin X2-QFN package measuring 1.6 mm × 1.6 mm with 0.4 mm pitch and exposed thermal pad. Pin numbering follows standard QFN orientation with pin 1 marked by a line indicator.

Pin/Terminal	Circuit Role	Design Meaning
1 (SEL0)	Digital control input	Selects source path: low = USB1, high = USB2 or MHL depending on SEL1 state; 1.8 V logic compatible.
2 (SEL1)	Digital control input	MSB of 2-bit select code; combined with SEL0 determines active path (USB1, USB2, or MHL) or high-Z mode.
3 (USB1+), 4 (USB1−)	Differential I/O	First USB 2.0 data pair; routed to D+/D− when SEL[1:0] = 00; supports 480 Mbps signaling.
5 (USB2+), 6 (USB2−)	Differential I/O	Second USB 2.0 data pair; routed to D+/D− when SEL[1:0] = 01; electrically identical to USB1 path.
7 (MHL+), 8 (MHL−)	Differential I/O	MHL/MyDP display link pair; routed to D+/D− when SEL[1:0] = 10; compliant with MHL Rev. 3.0 spec.
9 (GND)	Ground reference	Primary analog and digital ground return; must be connected to low-impedance PCB ground plane.
10 (D−), 11 (D+)	Common differential I/O	Shared output pair; connects to host/device USB/MHL PHY; bidirectional signal path with no internal termination.
12 (V_CC)	Power supply	Single-supply input for analog and digital circuitry; decoupling capacitor (≥0.1 µF) required adjacent to pin.

Key Features

Feature	Design Value
1.8 V–5.5 V wide supply range	Supports direct integration into diverse mobile platforms (application processors, PMICs, USB-C controllers) without auxiliary LDOs.
IOFF protection at V_CC = 0 V	Prevents back-driving and leakage between disconnected peripherals during battery removal or deep sleep modes.
Overvoltage tolerance (5.0 V)	Enables safe connection to unpowered or mismatched-voltage accessories (e.g., legacy USB cables, HDMI-MHL adapters) without external protection.
1.8 V-compatible control inputs	Eliminates level-shifting circuitry when driven by mobile SoC GPIOs, reducing BOM count and board area.
6.5 GHz bandwidth with matched R_ON	Ensures <0.1 Ω channel-to-channel resistance matching and <1 Ω flatness-critical for maintaining eye diagram integrity across USB/MHL protocols.

Applications

Smartphone Docking Hub

USB-C Multi-Protocol Adapter

Use Scenario: A compact smartphone dock using a single USB-C port to simultaneously support USB data transfer and MHL video output to an external monitor.

IC Role / Device Role / Timing Role: Analog multiplexer routing either USB 2.0 or MHL differential signals to shared D+/D− lines based on host negotiation and cable detection.

Use Value: Reduces connector count and PCB layer count by consolidating two high-speed protocols into one physical interface, enabling sub-5 mm profile designs.

Use Scenario: A portable USB-C adapter converting a laptop's USB-C port to HDMI (via MHL) and USB-A (for peripheral attachment) using passive cabling.

IC Role / Device Role / Timing Role: Protocol-selective signal switch enabling dynamic reconfiguration between USB host mode and MHL sink mode without firmware intervention.

Use Value: Achieves <−38 dB off-isolation and <−65 dB crosstalk-preventing USB data corruption during MHL video streaming and vice versa.

Notebook Internal Display Switching

Portable Instrumentation Data Interface

Use Scenario: An ultrabook with integrated MHL-capable GPU and dual USB 2.0 controllers sharing one USB-C transceiver for cost-sensitive display/data consolidation.

IC Role / Device Role / Timing Role: High-bandwidth analog switch providing sub-400 ns channel switching time to support rapid protocol handshaking during display hot-plug events.

Use Value: Delivers 100 µs turn-on/off timing and 50 ps propagation delay-enabling seamless transition between local display and external MHL monitor without visual artifacts.

Use Scenario: A handheld oscilloscope or spectrum analyzer using USB-C for PC connectivity and MHL for real-time waveform display on external monitors.

IC Role / Device Role / Timing Role: Signal path selector isolating sensitive analog front-end circuits from noisy USB/MHL digital traffic via high off-isolation and low leakage (<2 µA).

Use Value: Maintains <±2 µA on-leakage and <±10 µA off-leakage across −40°C to +85°C-ensuring measurement accuracy in field-deployed instruments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB 2.0 + MHL analog switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TS3USB3030RGTR	Single-channel 1:3 USB 2.0 switch only; no MHL support; 5.5 GHz bandwidth; 5.2 Ω R_ON; 10-pin UQFN.	Limited to USB-only routing; requires separate MHL switch or FPGA-based protocol handling.	Choose when MHL functionality is unnecessary and board space permits discrete switching solutions.
PI3DBL12412ZLEX	12-channel 2:1 PCIe 4.0 switch; 16 GHz bandwidth; 8 Ω R_ON; no MHL/USB-specific optimization or OVT.	Designed for high-speed serial links (PCIe, SATA), not optimized for USB/MHL voltage levels or ESD robustness.	Use only if migrating to multi-protocol high-speed interconnects beyond USB/MHL scope; not drop-in compatible.

Compared with TS3USB3030RGTR and PI3DBL12412ZLEX, the PI3USB3031XUAEX uniquely integrates dual-protocol (USB 2.0 + MHL Rev. 3.0) switching, 5.0 V OVT, and 1.8 V control compatibility in a 1.6 mm × 1.6 mm footprint-making it the only solution that eliminates external protection and level-shifting components in mobile docking architectures.

Availability

PI3USB3031XUAEX is available at Aetrix Electronics and suitable for smartphone docking hubs, USB-C multi-protocol adapters, and portable instrumentation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.

Supply support for PI3USB3031XUAEX 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 integrated circuits, specializing in high-performance analog, logic, and power management solutions for consumer, computing, industrial, and automotive markets.

The PI3USB3031 belongs to Diodes' Pericom high-speed analog switch product line, engineered specifically for mobile interface consolidation-enabling USB-C ecosystems to support simultaneous data, video, and audio over a single connector without sacrificing signal integrity.

FAQ

What is the maximum operating temperature for PI3USB3031XUAEX?

The PI3USB3031XUAEX is rated for continuous operation from −40°C to +85°C ambient temperature, with storage temperature extending to −65°C to +150°C. Its thermal performance is validated in the 1.6 mm × 1.6 mm X2-QFN package with exposed pad, supporting reliable operation in thermally constrained mobile enclosures.

Does PI3USB3031XUAEX require external termination resistors?

No. The PI3USB3031XUAEX does not require external series or parallel termination resistors. Its 5.5 Ω (MHL) and 4.5 Ω (USB) on-resistance, combined with 1.3 pF (MHL) and 1.0 pF (USB) on-capacitance, are designed to maintain 90 Ω differential impedance when used with standard 50 Ω PCB traces and proper layout-eliminating need for external matching components.

Can PI3USB3031XUAEX operate with V_CC = 1.8 V while switching 5 V-tolerant signals?

Yes. The device supports 1.8 V to 5.5 V V_CC, and all I/O pins feature overvoltage tolerance up to 5.0 V independent of V_CC level. When V_CC = 1.8 V, the MHL/USB signals can still safely reach 3.3 V or 5.0 V without damage or latch-up-enabling interoperability with mixed-voltage systems.

How does the PI3USB3031XUAEX handle simultaneous USB and MHL traffic?

It does not handle simultaneous traffic: the PI3USB3031XUAEX is a 1:3 multiplexer, meaning only one of the three input paths (USB1, USB2, or MHL) is connected to the common D+/D− output at any time. Channel selection is mutually exclusive and controlled by SEL0/SEL1 logic states per the truth table in DS45428 Rev 3-2.

PI3USB3031XUAEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Switch Circuit:: SP3T - Open/Closed

Multiplexer/Demultiplexer Circuit:: 3:1

Number of Circuits:: 2

On-State Resistance (Max):: 7Ohm

Channel-to-Channel Matching (ΔRon):: 100mOhm

Voltage - Supply, Single (V+):: 1.8V ~ 5.5V

Voltage - Supply, Dual (V±):: -

Switch Time (Ton, Toff) (Max):: 100µs, 100µs

-3db Bandwidth:: 6.5GHz

Charge Injection:: -

Channel Capacitance (CS(off), CD(off)):: 1.3pF, 1.3pF

Current - Leakage (IS(off)) (Max):: 2µA

Crosstalk:: -65dB @ 240MHz

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 12-STQFN (1.6x1.6)

PI3USB3031XUAEX FAQ

1.How can I place an order for PI3USB3031XUAEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI3USB3031XUAEX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PI3USB3031XUAEX reliable?

The price and inventory of PI3USB3031XUAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3USB3031XUAEX is usually 5 days.

3.What payment methods are accepted for PI3USB3031XUAEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3USB3031XUAEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI3USB3031XUAEX?

PI3USB3031XUAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI3USB3031XUAEX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PI3USB3031XUAEX?

For technical support, including PI3USB3031XUAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3USB3031XUAEX requirements.

6.How does Aetrix verify that PI3USB3031XUAEX is sourced from the original manufacturer or authorized distributors?

All PI3USB3031XUAEX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI3USB3031XUAEX meets industry standards.

7.What is the process for return or replacement of PI3USB3031XUAEX?

All PI3USB3031XUAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3USB3031XUAEX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PI3USB3031XUAEX part is unused and in its original packaging.

Return procedure for PI3USB3031XUAEX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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