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Diodes Incorporated PI3USB31ZUAEX
- Part No.:
- PI3USB31ZUAEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
PI3USB31ZUAEX.pdf
- Description:
- IC USB2 SWITCH U-QFN1515-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,078
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Product details
Overview
PI3USB31ZUAEX from Diodes Incorporated is a high-speed, bidirectional USB 2.0 (480 Mbps) 1-port analog switch with full power-down capability, designed for signal routing in mobile and consumer devices. It features 6 Ω typical on-resistance, 2110 MHz –3-dB bandwidth, 5 pF typical on-capacitance, and supports 2.8 V to 4.3 V supply operation. Used in smartphones and notebooks to multiplex USB data lines between controllers and connectors.
For engineers reviewing the PI3USB31ZUAEX datasheet, PI3USB31ZUAEX pinout, PI3USB31ZUAEX application, or PI3USB31ZUAEX equivalent, key selection criteria include low insertion loss at 480 Mbps, sub-1 ns switching timing, IOFF-enabled power-down isolation, and UQFN1515-8 package compatibility with high-density PCB layouts.
Technical Context
The PI3USB31ZUAEX implements a single-pole double-throw (SPDT) analog switch architecture optimized for differential USB 2.0 signaling. Its low RON (6 Ω typ.) and flat RON variation (<2 Ω) ensure minimal signal attenuation and amplitude distortion across the 0–2110 MHz bandwidth.
Control logic uses a single OE (output enable) pin with 1.8 V–compatible thresholds and IOFF functionality that disables leakage paths when VDD = 0 V. The device maintains <0.35 Ω RON delta between D+/D− paths, enabling <50 ps output skew and >30 dB OFF-isolation at 240 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3 dB) | 2110 MHz - preserves USB 2.0 eye diagram integrity up to 480 Mbps with minimal rise-time degradation |
| On-resistance (RON) | 6 Ω typical - limits voltage drop and power loss under ±64 mA signal current |
| RON flatness (ΔRON) | <0.35 Ω typical - ensures matched D+/D− path impedance for low differential skew |
| On-capacitance (CIO(ON)) | 5 pF typical - minimizes loading on high-speed USB traces and preserves signal edge fidelity |
| OFF-isolation (OIRR) | –30 dB at 240 MHz - suppresses crosstalk between active and inactive USB ports during switching |
| Supply voltage range | 2.8 V to 4.3 V - compatible with modern smartphone PMIC rails and battery-backed USB I/O domains |
| ESD rating | ±4 kV contact (IEC61000-4-2) - protects USB interface against common handling and docking events |
Pinout & Package
Package: 8-pin UQFN1515-8 (ZUA), 1.5 mm × 1.5 mm, 0.5 mm pitch, exposed thermal pad (GND-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 6, 7 | GND, VDD, NC, HSD+, HSD− | GND (pins 1, 7) provides return path and thermal dissipation; VDD (pin 2) powers internal logic and switch; NC (pin 3) is unconnected; HSD+ and HSD− (pins 6, 7) are high-speed upstream data outputs |
| 4, 5, 8 | D+, D−, OE | D+ and D− (pins 4, 5) are bidirectional downstream data I/Os; OE (pin 8) enables/disables switch conduction - low = disconnect, high = pass |
Key Features
| Feature | Design Value |
|---|---|
| IOFF power-down mode | Enables full signal isolation with VDD = 0 V and ≤2 μA OFF-state leakage - critical for battery-powered USB port sharing |
| Low RON flatness | <0.35 Ω ΔRON between D+/D− ensures <50 ps output skew - preserves USB 2.0 differential timing compliance |
| High OFF-isolation | –30 dB at 240 MHz suppresses coupling from adjacent USB lanes or RF sources - improves noise margin in compact handheld PCBs |
| 1.8 V–compatible control | OE accepts 1.3 V (min) logic-high at 2.8 V VDD - interoperable with low-voltage application processors without level-shifting |
| Green RoHS/REACH compliance | Lead-free, halogen-free, antimony-free (Br+Cl <1500 ppm, Sb <1000 ppm) - meets global environmental regulations for consumer electronics |
Applications
| Smartphone USB Multiplexing | Notebook Docking Interface |
|---|---|
Use Scenario: Routing USB 2.0 signals between baseband processor and dual USB connectors (e.g., OTG + charging port). IC Role / Device Role / Timing Role: Bidirectional SPDT analog switch enabling dynamic USB path selection without protocol awareness. Use Value: Eliminates need for separate USB PHYs per port while maintaining 480 Mbps throughput and <200 ps total jitter. |
Use Scenario: Sharing a single USB 2.0 controller between internal peripherals and external docking station. IC Role / Device Role / Timing Role: High-bandwidth signal switch with fast tON/tOFF (55 ns / 25 ns) for seamless host-side port arbitration. Use Value: Enables hot-plug detection and reconfiguration within USB enumeration timeout windows. |
| Digital Camera Data Transfer | USB Hub Signal Conditioning |
Use Scenario: Switching USB 2.0 data lines between image sensor subsystem and external PC connection. IC Role / Device Role / Timing Role: Low-skew, low-capacitance analog switch preserving signal integrity during high-resolution video streaming. Use Value: Maintains >2110 MHz bandwidth to avoid eye closure and bit errors at sustained 480 Mbps transfer rates. |
Use Scenario: Isolating downstream USB ports on a hub IC to reduce crosstalk and improve EMI performance. IC Role / Device Role / Timing Role: Power-gated switch providing >30 dB OFF-isolation to suppress inter-port interference. Use Value: Improves hub compliance with USB 2.0 electrical specifications under multi-port load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB 2.0 analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TS3USB30E by Texas Instruments | Higher RON (8 Ω typ.), lower bandwidth (1900 MHz), no IOFF support | Lacks true zero-power isolation - unsuitable for battery-off state retention | Select when IOFF is not required and board space allows larger 10-pin UQFN package |
| MAX14534A by Maxim Integrated | Lower RON (4.5 Ω typ.), but higher CIO(ON) (7.5 pF), no 1.8 V–compatible OE | Requires 3.3 V logic control - adds level-shifter complexity in 1.8 V SoC designs | Select when ultra-low RON dominates over capacitance and control-voltage compatibility |
Compared with TS3USB30E and MAX14534A, the PI3USB31ZUAEX uniquely balances low RON, ultra-low CIO(ON), IOFF capability, and 1.8 V–compatible control - making it optimal for space-constrained, battery-sensitive USB 2.0 routing in portable systems.
Availability
PI3USB31ZUAEX is available at Aetrix Electronics and suitable for smartphone USB multiplexing, notebook docking interfaces, and digital camera data transfer requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for PI3USB31ZUAEX 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 solutions for consumer, computing, and industrial markets.
The PI3USB31 belongs to Diodes' high-speed analog switch product line, engineered specifically for USB 2.0 signal integrity preservation in portable electronics with stringent size, power, and EMI constraints.
FAQ
What is the maximum data rate supported by PI3USB31ZUAEX?
The PI3USB31ZUAEX supports full-speed USB 2.0 operation at 480 Mbps, validated by its 2110 MHz –3-dB bandwidth and <200 ps total jitter specification under 480 Mbps PRBS215–1 test conditions. It passes USB 2.0 electrical compliance tests including eye diagram mask and rise/fall time requirements.
Does PI3USB31ZUAEX require external biasing or termination resistors?
No. The PI3USB31ZUAEX operates as a passive analog switch with no internal active circuitry requiring biasing. It does not integrate termination resistors; external 90 Ω differential termination must be placed at the receiver end per USB 2.0 specification, independent of the switch.
Can PI3USB31ZUAEX be used with USB 3.0 or USB-C interfaces?
No. The PI3USB31ZUAEX is specified only for USB 2.0 (480 Mbps) signaling. Its bandwidth and channel characteristics are not validated for SuperSpeed (5 Gbps) differential pairs or USB-C alternate modes. It may be used alongside USB 3.0 in hybrid designs but only for legacy USB 2.0 signal routing.
How does the IOFF feature behave when VDD is disconnected?
When VDD = 0 V, the IOFF circuit actively disables all internal FET channels, limiting D+/D− to HSD+/HSD− leakage to ≤2 μA regardless of signal voltage (–0.5 V to 4.3 V). This prevents back-powering of the USB controller and maintains signal isolation without external blocking diodes.
PI3USB31ZUAEX 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:
- 1:1
- Switch Circuit:
- SPST
- Number of Channels:
- 2
- On-State Resistance (Max):
- -
- Voltage - Supply, Single (V+):
- 2.8V ~ 4.3V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 2.11GHz
- Features:
- Bi-Directional, USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (4x6)
PI3USB31ZUAEX FAQ
1.How can I place an order for PI3USB31ZUAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3USB31ZUAEX 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 PI3USB31ZUAEX reliable?
The price and inventory of PI3USB31ZUAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3USB31ZUAEX is usually 5 days.
3.What payment methods are accepted for PI3USB31ZUAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3USB31ZUAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3USB31ZUAEX?
PI3USB31ZUAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3USB31ZUAEX 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 PI3USB31ZUAEX?
For technical support, including PI3USB31ZUAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3USB31ZUAEX requirements.
6.How does Aetrix verify that PI3USB31ZUAEX is sourced from the original manufacturer or authorized distributors?
All PI3USB31ZUAEX 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 PI3USB31ZUAEX meets industry standards.
7.What is the process for return or replacement of PI3USB31ZUAEX?
All PI3USB31ZUAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3USB31ZUAEX, 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 PI3USB31ZUAEX part is unused and in its original packaging.
Return procedure for PI3USB31ZUAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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