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Diodes Incorporated PI3USB302-AZBEX
- Part No.:
- PI3USB302-AZBEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
PI3USB302-AZBEX.pdf
- Description:
- IC MUX/DEMUX USB 3.0 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,300
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Product details
Overview
PI3USB302-AZBEX from Diodes Incorporated is a 2-channel, bi-directional USB 3.0 SuperSpeed (5.0 Gbps) 2:1 multiplexer/demultiplexer switch in a 20-pin TQFN package. It supports differential signal routing between two upstream ports and one downstream port with 8.1 GHz bandwidth, 10 ps max bit-to-bit skew, and -1 dB insertion loss at 2.5 GHz - enabling clean eye diagrams in host-side USB 3.0 docking and hub applications.
For engineers reviewing the PI3USB302-AZBEX datasheet, PI3USB302-AZBEX pinout, PI3USB302-AZBEX application, or PI3USB302-AZBEX equivalent, key selection criteria include its low crosstalk (-33 dB @ 2.5 GHz), high off-isolation (-27 dB @ 2.5 GHz), 3.3 V ±10% supply operation, and dual-port switching control via SEL/PD pins for USB 3.0 signal path management.
Technical Context
The PI3USB302-AZBEX implements a passive analog switch architecture optimized for high-speed differential signaling, with matched trace lengths and controlled impedance paths to preserve signal integrity across both Tx and Rx differential pairs. Its internal layout minimizes channel-to-channel skew (≤20 ps) and ensures symmetrical propagation delay for USB 3.0's full-duplex 5.0 Gbps operation.
Switching is controlled by two logic inputs: SEL selects active port (Port 1 or Port 2), while PD enables power-down mode (Hi-Z on all I/Os, 40 µA max IDD). The device operates exclusively from a single 3.3 V supply and requires no external biasing or termination resistors for standard 50 Ω differential interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 8.1 GHz – supports full USB 3.0 SuperSpeed data rate (5.0 Gbps) with minimal high-frequency attenuation |
| Insertion Loss | -1.0 dB @ 2.5 GHz – maintains adequate signal amplitude margin for reliable receiver eye opening |
| Crosstalk | -33 dB @ 2.5 GHz – prevents interference between active and inactive differential channels during switching |
| Off Isolation | -27 dB @ 2.5 GHz – suppresses signal leakage to disabled port, critical for multi-host arbitration |
| Bit-to-Bit Skew | 10 ps max – preserves differential pair timing alignment to meet USB 3.0 jitter budget |
| Supply Voltage | 3.3 V ±10% – compatible with standard USB host-side power rails without regulation overhead |
| ESD Tolerance | 2 kV HBM – provides robustness against handling and system-level ESD events in end-user interfaces |
Pinout & Package
Package: 20-contact, 2.5 × 4.5 mm TQFN (ZB), exposed thermal pad, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 2 (PD) | Power-down control input | Active-high logic input that places all I/Os in Hi-Z state when asserted, reducing system standby current to ≤40 µA |
| 3–4, 7–8, 12–13, 14–15, 16–17, 18–19 (Tx±/Rx± pairs) | Differential I/O terminals | Eight dedicated differential pins supporting two full USB 3.0 ports (Port 1: Tx1±/Rx1±; Port 2: Tx2±/Rx2±) and common port (Tx±/Rx±) |
| 9 (SEL) | Port selection input | Logic-controlled switch selector: SEL = L → Port 1 active; SEL = H → Port 2 active |
| 1, 6, 10, 11, 20 (VDD) | Positive supply | Four dedicated 3.3 V supply pins distributed for low-impedance decoupling and reduced power rail noise |
| 5, 11, 20, center pad (GND) | Ground reference | Multiple ground connections including exposed thermal pad ensure stable return path and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional USB 3.0 switching | Enables shared downstream connection between two hosts (e.g., laptop + tablet) without protocol translation or active re-timing |
| Low channel-to-channel skew | ≤20 ps ensures simultaneous switching of Tx/Rx paths, preventing inter-pair timing misalignment in full-duplex links |
| Integrated 50 Ω matched routing | On-die impedance control eliminates need for external series resistors or board-level tuning for USB 3.0 compliance |
| Ultra-low power-down current | ≤40 µA in PD mode allows seamless integration into battery-powered docks and portable hubs with minimal quiescent drain |
| Lead-free & green packaging | TQFN-ZB package meets RoHS 3, halogen-free (<900 ppm Br/Cl), and antimony-free requirements for global environmental compliance |
Applications
| USB 3.0 Docking Station | Multi-Host USB Hub |
|---|---|
Use Scenario: A compact desktop dock connects a single USB-C peripheral (e.g., monitor with USB hub) to either a Windows laptop or macOS notebook. IC Role / Device Role / Timing Role: Acts as a hardware-selectable 2:1 mux to route SuperSpeed lanes between two upstream hosts and one downstream port. Use Value: Eliminates software-based USB switching delays and preserves native 5.0 Gbps throughput without packet buffering or protocol conversion. | Use Scenario: An industrial USB hub supports concurrent attachment of two independent controllers (PLC + HMI) to shared test instrumentation. IC Role / Device Role / Timing Role: Provides isolated, low-skew signal routing between two upstream USB 3.0 controllers and one downstream measurement device. Use Value: Enables deterministic, real-time data acquisition by avoiding arbitration latency and maintaining sub-10 ps differential pair alignment. |
| USB-C Alternate Mode Switching | Embedded System Debug Interface Sharing |
Use Scenario: A laptop dock uses USB-C Alt Mode to carry DisplayPort and USB 3.0 simultaneously; PI3USB302-AZBEX routes only the USB lanes. IC Role / Device Role / Timing Role: Selectively switches USB 3.0 differential pairs while leaving DP lanes unaffected, preserving Alt Mode signal integrity. Use Value: Allows independent control of USB and video paths using discrete, optimized switches - avoiding cross-talk degradation in mixed-signal USB-C implementations. | Use Scenario: An embedded medical device shares a single USB 3.0 debug port between main CPU and safety-monitoring co-processor during firmware updates. IC Role / Device Role / Timing Role: Routes debug traffic to either processor core based on SEL state, with hardware-enforced isolation during power-down. Use Value: Ensures secure, non-overlapping debug access without software coordination, meeting IEC 62304 partitioning requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 3.0 mux/demux applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3USB302RSER | TI part with identical 2:1 USB 3.0 mux function but higher typical insertion loss (-1.3 dB @ 2.5 GHz) and lower off-isolation (-22 dB) | Less suitable for noise-sensitive multi-host environments due to reduced channel separation | Select when cost sensitivity outweighs signal integrity margin; verify eye diagram compliance in final layout |
| PI3DBS3222ZBEX | Diodes' 2-channel 2:1 USB 3.0 switch with integrated 50 Ω termination and lower crosstalk (-38 dB), but requires external VDD filtering | Better for space-constrained designs needing on-chip termination, though adds BOM complexity | Prefer for new designs where board area is limited and design-in support for termination networks is available |
Compared with TS3USB302RSER and PI3DBS3222ZBEX, the PI3USB302-AZBEX delivers superior off-isolation and lower insertion loss - making it optimal for high-reliability USB 3.0 switching where signal fidelity and multi-host isolation are primary constraints.
Availability
PI3USB302-AZBEX is available at Aetrix Electronics and suitable for USB 3.0 docking stations, multi-host industrial hubs, and embedded debug interface sharing requiring stable component supply and long-term production continuity.
Supply support for PI3USB302-AZBEX 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 connectivity solutions for industrial, computing, and consumer markets.
The PI3USB302-AZBEX belongs to Diodes' Pericom USB signal-integrity product line, engineered specifically for low-skew, high-bandwidth USB 3.0 switching in space-constrained, noise-sensitive applications such as portable docks and embedded systems.
FAQ
What is the maximum operating temperature for PI3USB302-AZBEX?
The PI3USB302-AZBEX is rated for case temperature operation from -40°C to +85°C, with absolute maximum junction temperature of 125°C. Thermal performance is enhanced by the exposed center pad, which must be soldered to a PCB thermal plane per Diodes' recommended land pattern to maintain reliability under continuous 5.0 Gbps switching.
Does PI3USB302-AZBEX require external termination resistors?
No. The PI3USB302-AZBEX integrates matched 50 Ω differential impedance paths internally and is designed to operate directly with standard 50 Ω PCB traces. External series resistors or parallel termination are not required, simplifying layout and reducing BOM count for USB 3.0 compliance.
Can PI3USB302-AZBEX support USB 3.1 Gen 1 or Gen 2 data rates?
The PI3USB302-AZBEX is specified for USB 3.0 (5.0 Gbps, Gen 1) with 8.1 GHz bandwidth and measured performance up to 4.0 GHz. While it may pass USB 3.1 Gen 1 signals (same 5.0 Gbps rate), it is not characterized or guaranteed for USB 3.1 Gen 2 (10 Gbps) due to insufficient bandwidth margin and unvalidated jitter performance at 5 GHz fundamental.
How does the PD pin interact with SEL during switching transitions?
When PD is asserted (high), all I/Os enter Hi-Z regardless of SEL state - effectively overriding port selection. When PD is de-asserted (low), SEL determines active port (L = Port 1, H = Port 2). Transition timing is specified: enable/disable times are 25–30 ns and 5–25 ns respectively, ensuring glitch-free switching without bus contention.
PI3USB302-AZBEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- USB
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Switch Circuit:
- -
- Number of Channels:
- 2
- On-State Resistance (Max):
- -
- Voltage - Supply, Single (V+):
- 3V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- -
- Features:
- Bi-Directional, USB 3.0
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (2.5x4.5)
PI3USB302-AZBEX FAQ
1.How can I place an order for PI3USB302-AZBEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3USB302-AZBEX 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 PI3USB302-AZBEX reliable?
The price and inventory of PI3USB302-AZBEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3USB302-AZBEX is usually 5 days.
3.What payment methods are accepted for PI3USB302-AZBEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3USB302-AZBEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3USB302-AZBEX?
PI3USB302-AZBEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3USB302-AZBEX 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 PI3USB302-AZBEX?
For technical support, including PI3USB302-AZBEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3USB302-AZBEX requirements.
6.How does Aetrix verify that PI3USB302-AZBEX is sourced from the original manufacturer or authorized distributors?
All PI3USB302-AZBEX 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 PI3USB302-AZBEX meets industry standards.
7.What is the process for return or replacement of PI3USB302-AZBEX?
All PI3USB302-AZBEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3USB302-AZBEX, 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 PI3USB302-AZBEX part is unused and in its original packaging.
Return procedure for PI3USB302-AZBEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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