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Diodes Incorporated PI3USB14-ALEX
- Part No.:
- PI3USB14-ALEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
PI3USB14-ALEX.pdf
- Description:
- IC USB SWITCH 4:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,463
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Product details
Overview
PI3USB14-ALEX from Diodes Incorporated is a 2-channel, 4:1 USB 2.0 multiplexer/demultiplexer with 3-state outputs, designed for high-fidelity signal routing in portable and embedded host systems. It delivers 815 MHz -3dB bandwidth, 5 Ω on-resistance, near-zero propagation delay (0.3 ns), 3.3 V supply operation, and 5 V I/O tolerance - enabling reliable switching of full-speed and high-speed USB 2.0 differential data pairs.
For engineers reviewing the PI3USB14-ALEX datasheet, PI3USB14-ALEX pinout, PI3USB14-ALEX application, or PI3USB14-ALEX equivalent, key selection criteria include USB 2.0 signal integrity preservation, rail-to-rail input voltage support, industrial temperature range (-40°C to +85°C), ESD robustness (8 kV HBM), and compatibility with 16-pin TSSOP packaging for space-constrained PCB layouts.
Technical Context
The PI3USB14-ALEX implements dual independent 4:1 analog switches controlled by two select lines (S1, S0) and a single active-low enable (EN), supporting bidirectional signal flow without introducing ground bounce or measurable propagation delay beyond RC time constant (~0.3 ns with 10 pF load). Each channel routes one of four differential inputs (IA0–IA3 or IB0–IB3) to its respective output (YA or YB).
Its architecture supports hot insertion, features beyond-rail-to-rail switching capability, and maintains signal fidelity via low crosstalk (-35 dB at 480 Mbps) and high off-isolation (-35 dB), making it suitable for dynamic USB port sharing and docking station applications where signal integrity and power sequencing resilience are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 815 MHz - preserves USB 2.0 high-speed (480 Mbps) eye diagram integrity |
| On-Resistance (RON) | 5 Ω typical - minimizes insertion loss (< –0.5 dB at 240 MHz) and signal attenuation |
| Propagation Delay | 0.3 ns - negligible timing impact in USB 2.0 link layer timing budgets |
| I/O Voltage Tolerance | 5 V tolerant with 3.3 V supply - enables interfacing with legacy 5 V logic without level shifters |
| ESD Protection | 8 kV HBM, ±4 kV IEC61000-4-2 contact - ensures robustness during board handling and system integration |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded applications |
| Supply Voltage | 3.3 V ±10% - compatible with standard USB host power rails and low-power SoC domains |
Pinout & Package
PI3USB14-ALEX is packaged in a 16-pin, 150-mil wide Pb-free and Green-compliant TSSOP (L) package with exposed pad thermal design. Pin numbering follows standard JEDEC TSSOP orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Active-Low Enable Input | Disables both channels simultaneously; drives outputs to high-impedance state when high |
| S1, S0 | Channel Select Inputs | Binary-coded control (00–11) selecting one of four inputs per channel (IA0–IA3 / IB0–IB3) |
| IA0–IA3, IB0–IB3 | Analog Data Inputs | Differential USB 2.0 input pairs routed through internal FET switches; tolerate 5 V signals |
| YA, YB | Analog Data Outputs | Single-ended outputs per channel; support bidirectional USB 2.0 signal flow |
| VDD | Power Supply | 3.3 V supply input; powers internal logic and switch bias circuitry |
| GND | Ground Reference | Common return path for analog and digital domains; critical for noise suppression |
| N.C. | No Internal Connection | Pins 12, 13, 14, 15 - unused; must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| High Bandwidth Switching | 815 MHz -3dB bandwidth ensures minimal distortion of USB 2.0 high-speed differential signals |
| Low On-Resistance | 5 Ω typical RON reduces voltage drop and maintains signal amplitude across full USB 2.0 data range |
| Rail-to-Rail Input Support | Accepts input voltages beyond VDD/GND rails (–0.5 V to +6.0 V), simplifying interface with mixed-voltage systems |
| Hot-Insertion Capability | Enables safe connection/disconnection of USB peripherals without system reset or latch-up risk |
| Industrial Temperature Range | –40°C to +85°C operation validated for automotive infotainment, industrial docking, and medical USB peripherals |
Applications
| USB 2.0 Port Sharing | Mobile Docking Station |
|---|---|
Use Scenario: A single USB 2.0 controller serves multiple downstream ports via dynamic channel selection. IC Role / Device Role / Timing Role: Dual 4:1 Mux/Demux routes D+/D– pairs between host controller and selected peripheral port. Use Value: Enables cost-effective port expansion without adding USB hubs or re-timing ICs, preserving native USB timing compliance. | Use Scenario: Laptop connects to external display, storage, and keyboard via a compact dock with shared USB 2.0 upstream link. IC Role / Device Role / Timing Role: Routes high-speed USB 2.0 data between laptop and dock peripherals while maintaining signal integrity under hot-plug events. Use Value: Eliminates need for separate USB controllers per function, reducing BOM count and PCB area in space-constrained dock designs. |
| Embedded Host Switching | USB OTG Device Selection |
Use Scenario: Industrial gateway with dual USB hosts (MCU + FPGA) shares one physical connector for firmware updates and diagnostics. IC Role / Device Role / Timing Role: Bidirectional 4:1 switch selects between host sources while isolating unused paths to prevent signal coupling. Use Value: Provides deterministic USB enumeration behavior and avoids bus contention during mode switching. | Use Scenario: Smartphone or tablet operating in USB On-The-Go mode dynamically selects between peripheral functions (e.g., mass storage vs. serial debug). IC Role / Device Role / Timing Role: Enables fast, glitch-free reconfiguration of USB D+/D– routing based on role negotiation (ID pin detection). Use Value: Supports seamless transition between host/peripheral roles without signal degradation or enumeration failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 2.0 multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3USB30E | Single-channel 3:1 USB 2.0 switch; 6 Ω RON; 900 MHz bandwidth; 1.8–4.3 V supply | Supports only one differential pair; lacks dual-channel architecture and 3-state outputs | Choose when single-lane routing suffices and lower channel count reduces layout complexity |
| MAX4989 | Dual-channel 4:1 USB 2.0 switch; 7 Ω RON; 800 MHz bandwidth; 3.0–3.6 V supply; integrated ESD protection | Higher on-resistance increases insertion loss; narrower supply range limits compatibility with marginally regulated rails | Prefer when integrated ±15 kV ESD protection is required and 5 V I/O tolerance is not needed |
Compared with TS3USB30E and MAX4989, PI3USB14-ALEX offers superior USB 2.0 signal fidelity via lower RON and higher bandwidth, dual independent channels with 3-state outputs for flexible bus isolation, and broader 5 V I/O tolerance - making it optimal for multi-port, hot-pluggable, and mixed-voltage USB 2.0 routing architectures.
Availability
PI3USB14-ALEX is available at Aetrix Electronics and suitable for USB 2.0 port sharing, mobile docking stations, and embedded host switching requiring stable component supply, consistent TSSOP packaging, and long-term industrial temperature qualification.
Supply support for PI3USB14-ALEX 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 PI3USB14-ALEX belongs to Diodes' high-speed analog switch product line, engineered specifically for USB 2.0 signal routing in space-constrained, thermally demanding, and hot-plug-capable applications.
FAQ
What is the maximum data rate supported by PI3USB14-ALEX?
The PI3USB14-ALEX supports USB 2.0 high-speed operation up to 480 Mbps, validated by –35 dB crosstalk and off-isolation measurements at that data rate. Its 815 MHz –3dB bandwidth ensures minimal signal degradation, and insertion loss remains below –0.5 dB at 240 MHz - well within USB 2.0 eye diagram compliance margins.
Can PI3USB14-ALEX operate with a 5 V supply?
No - PI3USB14-ALEX is specified for 3.3 V ±10% supply operation only. However, its I/O pins are 5 V tolerant, allowing direct connection to 5 V signal sources (e.g., legacy USB transceivers) without external level-shifting circuitry, while the internal logic and switch bias remain powered from the 3.3 V rail.
Does PI3USB14-ALEX require external pull-up or pull-down resistors on control pins?
No external biasing is required: EN, S1, and S0 have CMOS-compatible input thresholds (VIH = 1.3 V, VIL = 0.6 V) and leakage current ≤ ±1 µA. Driving these pins directly from 3.3 V LVTTL or GPIO outputs meets all DC specifications; pull resistors are unnecessary unless system-level noise immunity mandates them.
How does the thermal pad on the TSSOP package affect PCB layout?
The PI3USB14-ALEX TSSOP package includes an exposed thermal pad (pin 16) that must be soldered to a dedicated copper pour on the PCB for optimal thermal performance and mechanical reliability. Diodes recommends using a mesh stencil pattern for solder paste deposition and connecting the pad to internal ground planes via ≥4 thermal vias to maintain junction temperature within spec under continuous 3.3 V operation.
PI3USB14-ALEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- USB
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Switch Circuit:
- -
- Number of Channels:
- 2
- On-State Resistance (Max):
- 8Ohm
- Voltage - Supply, Single (V+):
- 3.3V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 815MHz
- Features:
- USB 2.0
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
PI3USB14-ALEX FAQ
1.How can I place an order for PI3USB14-ALEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3USB14-ALEX 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 PI3USB14-ALEX reliable?
The price and inventory of PI3USB14-ALEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3USB14-ALEX is usually 5 days.
3.What payment methods are accepted for PI3USB14-ALEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3USB14-ALEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3USB14-ALEX?
PI3USB14-ALEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3USB14-ALEX 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 PI3USB14-ALEX?
For technical support, including PI3USB14-ALEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3USB14-ALEX requirements.
6.How does Aetrix verify that PI3USB14-ALEX is sourced from the original manufacturer or authorized distributors?
All PI3USB14-ALEX 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 PI3USB14-ALEX meets industry standards.
7.What is the process for return or replacement of PI3USB14-ALEX?
All PI3USB14-ALEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3USB14-ALEX, 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 PI3USB14-ALEX part is unused and in its original packaging.
Return procedure for PI3USB14-ALEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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