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Diodes Incorporated PI3USB31532Q2ZLCEX
- Part No.:
- PI3USB31532Q2ZLCEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
PI3USB31532Q2ZLCEX.pdf
- Description:
- USB TYPE-C ALT MODE SWITCH W-QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,310
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Product details
Overview
PI3USB31532Q2ZLCEX from Diodes Incorporated is a 6:4 bidirectional differential crossbar switch IC for USB 3.2 Gen 2 (10Gbps) and DisplayPort 2.1 UHBR10 (20Gbps aggregate) signal routing through USB Type-C connectors. It supports three configurable modes: USB-only, USB+2-lane DP, or 4-lane DP; integrates AUX± to SBU switching; and operates across -40°C to +105°C with AEC-Q100 Grade 2 qualification for automotive smart cockpit systems.
For engineers reviewing the PI3USB31532Q2ZLCEX datasheet, PI3USB31532Q2ZLCEX pinout, PI3USB31532Q2ZLCEX application, or PI3USB31532Q2ZLCEX equivalent, key selection criteria include its 8.3GHz -3dB bandwidth, -1.7dB insertion loss at 10Gbps, I²C/pin control flexibility, TQFN-40 (3mm × 6mm) package, and AEC-Q100 automotive compliance - all critical for high-speed USB-C multiplexing in safety-conscious embedded designs.
Technical Context
This device implements a passive analog crossbar architecture with no signal regeneration - preserving signal integrity while enabling reconfigurable routing between six differential source-side channels (USB TX/RX, DP0–DP3, AUX) and four differential sink-side lanes (Type-C TX1/RX1, TX2/RX2, SBU1/SBU2). Its dual-mode control (MODE pin selects I²C vs. CONF[2:0] pin-strapping) allows dynamic configuration without firmware dependency.
Signal path design supports simultaneous USB 3.2 Gen 2 (10Gbps) and DP 2.1 UHBR10 (10Gbps per lane) operation, with verified -38dB crosstalk and -22dB off-isolation at 5GHz. The 3.3V supply powers internal logic and bias networks, while all I/O pins tolerate ±2000V HBM ESD and operate within -0.3V to 1.2V DC common-mode range for USB/DP signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Architecture | 6:4 bidirectional differential analog crossbar - enables flexible USB/DP lane mapping without retiming or protocol awareness. |
| Data Rate Support | 10Gbps USB 3.2 Gen 2 and 10Gbps/lane DP 2.1 UHBR10 - validated up to 8.3GHz -3dB bandwidth for full Gen 2 eye compliance. |
| Insertion Loss | -1.7dB @ 5GHz (USB), -2.3dB @ 5GHz (DP) - ensures minimal amplitude degradation across high-speed differential pairs. |
| Crosstalk | -38dB @ 5GHz (USB), -30dB @ 5GHz (DP) - prevents inter-pair interference in dense USB-C routing layouts. |
| Off Isolation | -22dB @ 5GHz (USB/DP) - suppresses signal leakage between inactive paths during mode switching. |
| Control Interface | I²C (7-bit address 0x54/0x55) or 3-pin CONF[2:0] strapping - supports both firmware-driven and hardware-configured deployment. |
| Operating Temperature | -40°C to +105°C (AEC-Q100 Grade 2) - qualified for under-hood and infotainment module environments. |
| Supply Voltage | 3.0V–3.6V (typ. 3.3V) - compatible with standard automotive LDO rails and low-noise power domains. |
Pinout & Package
Package: 40-pin TQFN (ZLC), 3mm × 6mm, 0.4mm pitch, exposed thermal pad (pin 37). RoHS-compliant, halogen-free, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13, 14, 15, 18, 22, 23, 26, 29, 32, 37 | GND / PGND / Center Pad | Ground reference and thermal dissipation path - all must be connected to solid ground plane for signal integrity and thermal stability. |
| 4, 7, 10, 25, 28, 31, 34 | VDD | 3.3V power supply input - seven dedicated pins ensure low-impedance delivery and decoupling for high-frequency switching. |
| 11, 12, 16, 17, 24, 27, 30, 33 | TX+/RX+, TX-/RX-, etc. | Differential I/O for USB 3.2 Gen 2 (source/sink) - internally pulldown-biased to GND for default state safety. |
| 2, 3, 5, 6, 8, 9, 39, 40 | DP0+/- to DP3+/- | Four DP 2.1 differential lanes - routed to Type-C connector based on CONF[2:0] or I²C register setting. |
| 19, 20, 21, 22 | AUX+, AUX-, SBU1, SBU2 | AUX channel and sideband pins - automatically remapped to SBU1/SBU2 when DP mode active per USB-C Alt Mode spec. |
| 1, 35, 36, 38 | MODE, CONF0/A1, CONF1/SCL, CONF2/SDA | Mode select and control interface - dual-function pins support pin-strapping (MODE=0) or I²C (MODE=1) with voltage-level selectable via MODE1. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive Qualification | AEC-Q100 Grade 2 (-40°C to +105°C), PPAP-capable, manufactured in IATF 16949 facilities - meets OEM requirements for cockpit electronics. |
| Signal Integrity Optimization | -1.7dB IL @ 10Gbps, -38dB crosstalk, -22dB off-isolation - eliminates need for external equalization in most USB-C DP Alt Mode implementations. |
| Flexible Control Architecture | Hardware pin-strapping (CONF[2:0]) or I²C (7-bit address 0x54/0x55) - enables both factory-programmed and runtime-reconfigurable system integration. |
| USB-C Alt Mode Compliance | Native support for DP 2.1 UHBR10 + USB 3.2 Gen 2 coexistence, including AUX→SBU remapping per VESA DP Alt Mode v1.0a specification. |
| Low-Power Operation | 30μA quiescent current in power-down mode (CONF[2:0]=000), 400μA active - reduces standby power in always-on vehicle systems. |
| Robust ESD Protection | ±2000V HBM, ±1000V CDM - protects high-speed lanes against handling and system-level transients in automotive assembly and field use. |
Applications
| Smart Cockpit Head Unit | Rear Seat Entertainment |
|---|---|
|
Use Scenario: Central infotainment unit routes USB 3.2 video stream and DP 2.1 display output to front/rear displays via single USB-C port. IC Role / Device Role / Timing Role: Crossbar switch dynamically assigns DP lanes to rear HDMI converter and USB data to telematics controller - no protocol translation required. Use Value: Enables dual-display topology using one physical connector, reducing wiring harness complexity and PCB layer count while maintaining Gen 2 signal fidelity. |
Use Scenario: Passenger seat tablet docks into vehicle cradle, negotiating DP Alt Mode for 4K@60Hz display and USB 3.2 for peripheral connectivity. IC Role / Device Role / Timing Role: Reconfigures internal lanes to deliver full 4-lane DP 2.1 UHBR10 to display controller and USB 3.2 Gen 2 to host processor simultaneously. Use Value: Eliminates need for separate DP and USB connectors - simplifies mechanical design and improves user experience with single-cable docking. |
| Automotive Digital Mirror | ADAS Camera Hub |
|
Use Scenario: Rearview camera feed transmitted over DP 2.1 to digital mirror display, while USB 3.2 carries firmware updates and diagnostics. IC Role / Device Role / Timing Role: Routes DP0–DP3 to mirror controller and USB TX/RX to MCU - maintains independent timing domains for real-time video and control traffic. Use Value: Achieves sub-30ms end-to-end latency for safety-critical video path by avoiding packetized switching or buffering delays. |
Use Scenario: Multi-camera ADAS system aggregates feeds from four sensors into central domain controller via USB-C ports with DP Alt Mode capability. IC Role / Device Role / Timing Role: Switches individual DP lanes from each camera sensor to corresponding receiver channels - preserves native DP timing and link training. Use Value: Supports concurrent 4× 1080p60 DP streams without compression or frame dropping - essential for sensor fusion processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed USB-C crossbar switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3USB3031RSVR | 3:2 USB-only switch, no DP support, 5Gbps max, no AEC-Q100 qualification | Limited to USB 3.1 Gen 1 applications; unsuitable for DP Alt Mode or automotive temperature range | Select only for cost-sensitive non-automotive USB-C docking stations requiring basic USB switching. |
| PI3DBS16412ZLCEX | 16:4 DP-only switch, supports DP 2.1 but lacks USB 3.2 Gen 2 lanes and AUX/SBU routing | Requires separate USB switch IC; increases BOM count and layout complexity for hybrid USB/DP systems | Choose when DP lane count exceeds four or when USB functionality is handled elsewhere in the architecture. |
Compared with TS3USB3031RSVR and PI3DBS16412ZLCEX, the PI3USB31532Q2ZLCEX uniquely integrates USB 3.2 Gen 2 and DP 2.1 UHBR10 in a single AEC-Q100-qualified device - reducing component count, board space, and validation effort for automotive USB-C Alt Mode implementations.
Availability
PI3USB31532Q2ZLCEX is available at Aetrix Electronics and suitable for smart cockpit head units, rear seat entertainment systems, and ADAS camera hubs requiring stable component supply, automotive-grade reliability, and USB-C DP Alt Mode compliance.
Supply support for PI3USB31532Q2ZLCEX 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 automotive, industrial, and consumer markets - with emphasis on high-reliability, AEC-Q100-qualified components.
The PI3USB31532Q belongs to Diodes' high-speed interface product line, designed specifically for USB-C Alt Mode signal routing in automotive infotainment and ADAS systems where signal integrity, thermal robustness, and functional safety are mandatory.
FAQ
What is the maximum supported data rate for USB and DP signals?
The PI3USB31532Q2ZLCEX supports 10Gbps USB 3.2 Gen 2 (single-lane) and 10Gbps per lane for DP 2.1 UHBR10 (four-lane aggregate 40Gbps). Its 8.3GHz -3dB bandwidth and -1.7dB insertion loss at 5GHz ensure full compliance with USB-IF and VESA electrical specifications for these rates.
Does this device require external termination or AC coupling capacitors?
No external termination is required - the device uses internal 100Ω differential impedance matching. AC coupling capacitors (e.g., 0.22µF) are recommended on all high-speed lanes per layout guidelines in DS45687 Rev 3-2, but no series resistors or parallel termination networks are needed due to optimized on-die matching.
How does the I²C address get configured?
The I²C slave address is fixed at 0x54 (A1=0, A0=0) or 0x55 (A1=0, A0=1), set by hardware pins A1 (pin 35) and A0 (pin 14). When MODE=1, SDA (pin 38) and SCL (pin 36) become active I²C interface lines; the address is read-only and cannot be changed in software.
Is there any built-in ESD protection on the high-speed lanes?
Yes - the device features ±2000V HBM and ±1000V CDM ESD protection on all differential I/O pins (USB, DP, AUX, SBU), verified per JESD22-A114 and JESD22-C101. This eliminates need for external TVS diodes in most automotive PCB layouts, though Diodes recommends contacting local sales for system-level transient validation.
PI3USB31532Q2ZLCEX 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:
- 6
- On-State Resistance (Max):
- -
- Voltage - Supply, Single (V+):
- 3V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 8.3GHz
- Features:
- Bi-Directional, I2C, USB 3.2
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (3x6)
PI3USB31532Q2ZLCEX FAQ
1.How can I place an order for PI3USB31532Q2ZLCEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3USB31532Q2ZLCEX 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 PI3USB31532Q2ZLCEX reliable?
The price and inventory of PI3USB31532Q2ZLCEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3USB31532Q2ZLCEX is usually 5 days.
3.What payment methods are accepted for PI3USB31532Q2ZLCEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3USB31532Q2ZLCEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3USB31532Q2ZLCEX?
PI3USB31532Q2ZLCEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3USB31532Q2ZLCEX 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 PI3USB31532Q2ZLCEX?
For technical support, including PI3USB31532Q2ZLCEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3USB31532Q2ZLCEX requirements.
6.How does Aetrix verify that PI3USB31532Q2ZLCEX is sourced from the original manufacturer or authorized distributors?
All PI3USB31532Q2ZLCEX 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 PI3USB31532Q2ZLCEX meets industry standards.
7.What is the process for return or replacement of PI3USB31532Q2ZLCEX?
All PI3USB31532Q2ZLCEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3USB31532Q2ZLCEX, 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 PI3USB31532Q2ZLCEX part is unused and in its original packaging.
Return procedure for PI3USB31532Q2ZLCEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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