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Diodes Incorporated PI3USB31531ZLCEX
- Part No.:
- PI3USB31531ZLCEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
PI3USB31531ZLCEX.pdf
- Description:
- IC USB3 SWITCH W-QFN3060-40
- Quantity:
- Payment:
- Shipping:
Inventory:3,495
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Product details
Overview
PI3USB31531ZLCEX from Diodes Incorporated is a 6:4 differential-channel bidirectional crossbar switch for USB3.1 Gen2 (10 Gb/s) and DisplayPort 1.4 (8 Gb/s) signal routing through USB Type-C connectors in sink applications. It supports pin assignments C, D, and E; offers -3 dB insertion loss at 10 Gb/s; -8 dB return loss at 10 Gb/s; and operates from 3.0–3.6 V over -40°C to +85°C.
For engineers reviewing the PI3USB31531ZLCEX datasheet, PI3USB31531ZLCEX pinout, PI3USB31531ZLCEX application, or PI3USB31531ZLCEX equivalent, key selection criteria include differential channel count (6:4), I²C-configurable mux mode, -31 dB off-isolation at 10 Gb/s, 6 GHz -3 dB bandwidth, and support for simultaneous USB3.1 Gen2 + dual DP1.4 lanes or quad DP1.4 lanes.
Technical Context
The PI3USB31531 implements an I²C-controlled analog crossbar with six high-speed differential inputs (RX/TX/DP0–DP3/AUX) and four differential outputs routed to the USB Type-C connector. Its architecture enables dynamic reconfiguration between three operational modes: USB-only, USB+DP dual-lane, or full quad-lane DP - all while maintaining signal integrity up to 10 Gb/s.
Each path features matched trace-length design, on-die 100 kΩ termination resistors on AUX/SBU lines, and polarity inversion capability per channel. The device uses a single 3.3 V supply and integrates no external biasing components, simplifying layout for compact Type-C sink designs like monitors and docking stations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Signal Speed Support | USB3.1 Gen2 at 10 Gb/s (-3 dB IL); DP1.4 at 8 Gb/s (-3.7 dB IL) - enables full-bandwidth SuperSpeed and HBR3 video transport |
| Insertion Loss | -3 dB @ 10 Gb/s - preserves eye opening and BER margin for USB3.1 Gen2 compliance |
| Return Loss | -8 dB @ 10 Gb/s - limits reflections that cause intersymbol interference in high-speed serial links |
| Crosstalk | -53 dB @ 10 Gb/s - ensures minimal coupling between active differential pairs during mixed-signal routing |
| Off-Isolation | -31 dB @ 10 Gb/s - prevents signal leakage into inactive paths, critical for mode-switching integrity |
| -3 dB Bandwidth | 6 GHz - supports harmonics up to 5th order for clean NRZ pulse transmission |
| Supply Voltage | 3.0–3.6 V - compatible with standard 3.3 V rail without LDO overhead |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade monitor and docking station environments |
Pinout & Package
Package: 40-contact TQFN (ZLC), 5 mm × 5 mm × 0.75 mm, exposed thermal pad, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ENB | Enable Input | Active-low global enable controlling all switch paths; tied high via pull-up for default operation |
| SDA / SCL | I²C Data / Clock | Configures mux mode, polarity, and pin assignment (C/D/E) via standard 2-wire interface |
| A0 / A1 | I²C Address Select | Sets slave address (0x48–0x4F) to support multiple devices on same bus |
| RX+/RX-/TX+/TX- | USB3.1 Gen2 Differential Pair | Primary SuperSpeed lane I/O; supports both transmit and receive directions bidirectionally |
| DP0+ to DP3+ | DisplayPort Lane Inputs | Four independent DP differential inputs; selectable as 2 or 4 active lanes depending on mode |
| AUX+/AUX- | DP AUX Channel | Routed to SBU1/SBU2 pins in DP mode; supports ±0.35 V to 3.95 V swing for AUX signaling |
| SBU1 / SBU2 | Type-C Sideband Use | Carry AUX+/- in DP mode; used for orientation detection or alternate mode signaling |
Key Features
| Feature | Design Value |
|---|---|
| 6:4 Differential Crossbar Architecture | Enables flexible allocation of six high-speed sources (USB + DP0–DP3 + AUX) to four Type-C-facing differential paths |
| I²C-Controlled Mode Selection | Three configurable routing modes (USB-only, USB+DP×2, DP×4) selected dynamically without hardware change |
| Integrated 100 kΩ Termination Resistors | Eliminates need for external resistors on AUX/SBU lines, reducing BOM count and PCB area |
| Polarity Inversion per Channel | Corrects flipped cable orientation or board layout mismatches without external inverters |
| Industrial Temperature Range | Validated operation from -40°C to +85°C ensures reliability in uncooled monitor enclosures and docking hubs |
Applications
| Monitor Sink Interface | Docking Station Signal Aggregation |
|---|---|
Use Scenario: A desktop monitor receives USB3.1 Gen2 video data and DP1.4 display signals via a single USB Type-C upstream port. IC Role / Device Role / Timing Role: Crossbar switch routes either USB3.1 Gen2 only, or USB3.1 Gen2 + two DP1.4 lanes, or four DP1.4 lanes based on host negotiation. Use Value: Enables single-cable connectivity supporting both data and high-resolution video without sacrificing bandwidth or requiring separate ports. | Use Scenario: A laptop docking station consolidates USB3.1 peripherals and dual-display DP1.4 output through one Type-C connection. IC Role / Device Role / Timing Role: Acts as signal router selecting between USB3.1 Gen2 host link and DP1.4 display lanes, with AUX channel multiplexed to SBU for EDID communication. Use Value: Reduces component count and routing complexity while maintaining Gen2/DP1.4 signal integrity across multiple concurrent high-speed protocols. |
| USB-C Display Adapter | Thin Client Video Hub |
Use Scenario: A compact adapter converts USB-C host output to native DP++ or HDMI via level-shifting and protocol translation ICs. IC Role / Device Role / Timing Role: Provides clean, low-loss switching of DP1.4 lanes from host to downstream retimer or level shifter, with polarity correction for cable orientation. Use Value: Ensures robust DP1.4 HBR3 link training success rate by minimizing insertion loss and crosstalk before signal conditioning. | Use Scenario: An enterprise thin client uses USB-C for power, data, and dual 4K@60Hz display output in space-constrained chassis. IC Role / Device Role / Timing Role: Routes four DP1.4 lanes to dual display controllers while isolating unused paths to prevent noise coupling. Use Value: Achieves full quad-lane DP1.4 bandwidth with -31 dB off-isolation, enabling stable dual-4K operation without signal degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-C high-speed signal routing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3USB3031RSVR | 4:2 crossbar; supports USB3.1 Gen1 only (5 Gb/s); no DP support; lower -3 dB bandwidth (3.5 GHz) | Limited to USB-only or USB+single DP lane; not suitable for DP1.4 or quad-lane routing | Select when cost-sensitive USB3.1 Gen1 routing suffices and DP integration is unnecessary |
| PI3DBS16412ZLCEX | 16:4 differential switch; supports USB3.1 Gen2 and DP1.4; requires external I²C level shifters for 1.8 V logic | Higher channel count enables multi-source routing (e.g., dual hosts), but larger package and higher power | Choose for complex multi-host docking where source arbitration and expanded DP lane flexibility are required |
Compared with TS3USB3031RSVR and PI3DBS16412ZLCEX, the PI3USB31531ZLCEX uniquely balances 6:4 routing density, native DP1.4 + USB3.1 Gen2 coexistence, and integrated termination - making it optimal for compact, single-host sink applications like monitors and adapters.
Availability
PI3USB31531ZLCEX is available at Aetrix Electronics and suitable for monitor sink interfaces, USB-C docking stations, display adapters, and thin client video hubs requiring stable component supply and industrial temperature operation.
Supply support for PI3USB31531ZLCEX 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, headquartered in Plano, Texas, with design centers across Asia and Europe.
The PI3USB31531 belongs to Diodes' USB-C interface product line, engineered specifically for high-fidelity, low-latency routing of USB3.1 Gen2 and DP1.4 signals in compact sink-side applications.
FAQ
Does PI3USB31531ZLCEX support USB3.1 Gen2 and DP1.4 simultaneously?
Yes. In Mode 2, it routes one USB3.1 Gen2 lane plus two DP1.2/1.4 lanes to the Type-C connector, with AUX+/− routed to SBU1/SBU2. This configuration maintains full Gen2 and HBR3 bandwidth for concurrent data and display traffic without signal degradation.
What is the function of the A0 and A1 pins?
A0 and A1 set the I²C slave address (0x48–0x4F) to allow up to eight PI3USB31531 devices on the same bus. They are sampled at power-up and determine which device responds to I²C commands for mode selection and polarity control.
Can PI3USB31531ZLCEX operate with 1.8 V I²C logic levels?
No. The I²C interface requires VDD-referenced logic: SDA and SCL must swing between 0 V and VDD (3.0–3.6 V). External level shifters are required if interfacing with 1.8 V microcontrollers or FPGAs.
Is the PI3USB31531ZLCEX pinout compatible with other Diodes USB-C switches?
No. The PI3USB31531ZLCEX uses a unique 40-pin TQFN (ZLC) layout optimized for its 6:4 crossbar topology and integrated termination. Pin mapping differs from PI3DBS16412ZLCEX (48-pin) and PI3USB30532ZLEX (32-pin), requiring dedicated PCB layout.
PI3USB31531ZLCEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- USB
- Multiplexer/Demultiplexer Circuit:
- 6:4
- Switch Circuit:
- -
- Number of Channels:
- 4
- On-State Resistance (Max):
- -
- Voltage - Supply, Single (V+):
- 3V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 6GHz
- Features:
- Bi-Directional, USB 3.1
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (3x6)
PI3USB31531ZLCEX FAQ
1.How can I place an order for PI3USB31531ZLCEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3USB31531ZLCEX 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 PI3USB31531ZLCEX reliable?
The price and inventory of PI3USB31531ZLCEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3USB31531ZLCEX is usually 5 days.
3.What payment methods are accepted for PI3USB31531ZLCEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3USB31531ZLCEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3USB31531ZLCEX?
PI3USB31531ZLCEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3USB31531ZLCEX 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 PI3USB31531ZLCEX?
For technical support, including PI3USB31531ZLCEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3USB31531ZLCEX requirements.
6.How does Aetrix verify that PI3USB31531ZLCEX is sourced from the original manufacturer or authorized distributors?
All PI3USB31531ZLCEX 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 PI3USB31531ZLCEX meets industry standards.
7.What is the process for return or replacement of PI3USB31531ZLCEX?
All PI3USB31531ZLCEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3USB31531ZLCEX, 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 PI3USB31531ZLCEX part is unused and in its original packaging.
Return procedure for PI3USB31531ZLCEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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