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Diodes Incorporated PI3USB221AZUAEX
- Part No.:
- PI3USB221AZUAEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Analog Switches - Special Purpose
- Package:
- 10-UFQFN
- Datasheet:
-
PI3USB221AZUAEX.pdf
- Description:
- IC USB2 SWITCH 3V UQFN2015-10
- Quantity:
- Payment:
- Shipping:
Inventory:21,366
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Product details
Overview
PI3USB221AZUAEX from Diodes Incorporated is a high-bandwidth, bidirectional 1:2 USB 2.0 multiplexer/demultiplexer switch optimized for mobile and portable applications. It supports 480 Mbps high-speed USB signaling with 1.6 GHz bandwidth, 6 Ω max rON, and integrated over-voltage protection (OVP) on D+/D− pins up to 5.5 V. Used in smartphones and notebooks to route USB signals between host controllers and dual downstream ports.
For engineers reviewing the PI3USB221AZUAEX datasheet, PI3USB221AZUAEX pinout, PI3USB221AZUAEX application, or PI3USB221AZUAEX equivalent, key selection criteria include channel-to-channel skew (<0.2 ns), low ON-state resistance flatness (1 Ω max ΔrON), OVP response time (53 ns), and 1.8-V compatible control logic - all critical for maintaining signal integrity in compact USB 2.0 routing architectures.
Technical Context
The PI3USB221AZUAEX implements a single-pole double-throw (SPDT) analog switch architecture with independent S (select) and OE (output enable) control inputs. Its CMOS-based transmission gate design enables bidirectional signal flow with <0.25 ns propagation delay and <0.2 ns output skew between channels.
It features integrated over-voltage protection that clamps D+/D− to <3.8 V (typ) when shorted to 5 V VBUS, regardless of power state. The device operates across 2.3–3.6 V VDD while accepting 1.8-V logic control inputs and tolerating up to 5.5 V on I/O pins - enabling direct interfacing with mixed-voltage USB PHYs and MIPI signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3 dB) | 1.6 GHz typical - preserves USB 2.0 eye diagram integrity with minimal rise-time degradation |
| rON (max) | 6 Ω at VDD = 2.3 V, IO = ±30 mA - ensures low insertion loss for 480 Mbps differential signaling |
| ΔrON (typ) | 0.2 Ω - minimizes amplitude mismatch between channels, critical for common-mode rejection |
| Cio(on) (typ) | 4 pF - limits capacitive loading on high-speed data lines to maintain impedance continuity |
| tON/tOFF | 100 ns / 12 ns - enables fast switching between USB ports without disrupting enumeration timing |
| OVP Response Time | 53 ns - protects downstream PHYs during hot-plug transients before damage thresholds are exceeded |
| ESD Rating (HBM) | 12 kV on D+/D− pins - meets IEC 61000-4-2 Level 4 system-level ESD robustness requirements |
Pinout & Package
PI3USB221AZUAEX uses a 10-pin UQFN package (1.5 mm × 2.0 mm, ZUA10 footprint) with wettable flanks and exposed thermal pad. Pin 1 is located at the top-left corner per ordering information.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1D+, 1D− | Differential output port 1 | Connects to first downstream USB device; maintains 90 Ω differential impedance when active |
| 2D+, 2D− | Differential output port 2 | Routes USB signal to second downstream port; electrically isolated from 1D when inactive |
| D+, D− | Common differential input | Accepts bidirectional USB 2.0 signals from host controller; supports both upstream and downstream traffic |
| S | Select control input | Active-high logic selects between 1D and 2D paths; compatible with 1.8 V CMOS levels |
| OE | Output enable (active-low) | Disables all signal paths and reduces supply current to 4 µA - essential for power-gated USB subsystems |
| VDD | Supply voltage | 2.3–3.6 V operation; powers internal logic and switch core; decoupling required within 2 mm |
| GND | Ground reference | Low-inductance return path for both analog and digital domains; tied to exposed thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| Over-voltage protection (OVP) | Clamps D+/D− to ≤3.8 V during VBUS shorts - eliminates need for external TVS diodes in USB Type-C receptacle designs |
| Low-power disable mode | 4 µA ICC (typ) when OE = high - enables dynamic power gating in battery-powered devices without signal leakage |
| 1.8-V compatible control logic | VIH/VIL thresholds defined down to 1.4 V/0.6 V - allows direct interface with application processors' GPIOs without level shifters |
| High channel-to-channel isolation | –41 dB OFF-isolation at 250 MHz - prevents crosstalk between active and inactive USB paths in multi-peripheral systems |
| Matched ON-resistance flatness | 1 Ω max rON(flat) - ensures consistent signal attenuation across full input voltage swing (0–3.6 V), preserving differential symmetry |
Applications
| Smartphone USB Switching | Notebook Docking Multiplexing |
|---|---|
|
Use Scenario: Routing USB 2.0 signals between baseband processor and dual USB peripherals (e.g., OTG + charging port). IC Role / Device Role / Timing Role: SPDT analog switch enabling dynamic reconfiguration of USB data lanes without host intervention. Use Value: Eliminates mechanical USB switches; maintains <0.2 ns inter-pair skew to pass USB 2.0 compliance eye mask at 480 Mbps. |
Use Scenario: Sharing single USB 2.0 controller between internal hub and external docking station connector. IC Role / Device Role / Timing Role: Bidirectional signal router with OE-controlled power-down during dock disconnect events. Use Value: Reduces BOM count by replacing two discrete switches; OVP protects host controller during hot-insertion of non-compliant docks. |
| Tablet Camera Interface | MIPI D-PHY Signal Isolation |
|
Use Scenario: Isolating USB 2.0 debug interface from main SoC during camera module initialization sequences. IC Role / Device Role / Timing Role: Low-latency signal gate with 12 ns tOFF to prevent signal contention during mode transitions. Use Value: Prevents USB enumeration failures caused by floating D+/D− lines during camera boot; Cio(on) = 4 pF avoids MIPI D-PHY timing violations. |
Use Scenario: Sharing MIPI D-PHY lanes between camera and display subsystems using USB 2.0 physical layer routing. IC Role / Device Role / Timing Role: High-bandwidth analog mux supporting 1.6 GHz bandwidth - matches MIPI D-PHY HS mode slew rates. Use Value: Enables reuse of high-speed PCB traces across multiple functions; rON flatness <1 Ω maintains D-PHY common-mode voltage stability. |
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 |
|---|---|---|---|
| TS3USB221RSER | Higher rON (8 Ω max), no integrated OVP, 1.2 GHz bandwidth | Lacks VBUS-tolerant D+/D− protection; requires external clamping for USB Type-C designs | Preferred where cost sensitivity outweighs OVP requirement and board space allows external TVS |
| MAX14532EWC+ | 3.3 V only operation, 7 Ω rON, 1.4 GHz bandwidth, no 1.8 V logic support | Requires level-shifter for 1.8 V SoC GPIOs; not suitable for dual-voltage mobile platforms | Applicable in legacy 3.3 V-only industrial USB hubs where control voltage compatibility is guaranteed |
Compared with TS3USB221RSER and MAX14532EWC+, the PI3USB221AZUAEX delivers superior signal fidelity (1.6 GHz vs ≤1.4 GHz), integrated OVP eliminating external components, and native 1.8 V logic compatibility - making it optimal for space-constrained, mixed-voltage mobile USB routing.
Availability
PI3USB221AZUAEX is available at Aetrix Electronics and suitable for smartphone USB switching, notebook docking multiplexing, tablet camera interface isolation, and MIPI D-PHY signal routing requiring stable component supply across high-volume consumer electronics production.
Supply support for PI3USB221AZUAEX 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, specializing in high-performance signal integrity, power management, and protection solutions for consumer, computing, and industrial markets.
The PI3USB221A belongs to Diodes' high-speed analog switch product line, engineered specifically for USB 2.0 and MIPI D-PHY signal routing in space-constrained portable devices where bandwidth, low skew, and integrated protection are mandatory.
FAQ
Does PI3USB221AZUAEX support USB 3.0 SuperSpeed signals?
No. The PI3USB221AZUAEX is designed exclusively for USB 2.0 high-speed (480 Mbps) operation with 1.6 GHz bandwidth. USB 3.0 SuperSpeed requires ≥5 GHz bandwidth and differential impedance control not supported by this device. It must not be placed in SuperSpeed signal paths.
Can OE and S pins be driven directly from a 1.2 V GPIO?
No. While control inputs accept 1.8 V logic levels, VIH minimum is 1.3 V at VDD = 2.3–2.7 V and 1.4 V at VDD = 2.7–3.6 V. A 1.2 V GPIO cannot guarantee reliable high-state recognition and may cause undefined switching behavior or increased ICC.
What is the thermal impact of operating PI3USB221AZUAEX at 3.6 V VDD?
At 3.6 V VDD and full-load conditions, junction temperature rise is limited by the UQFN package's θJA of 48.7°C/W. With 50 µA max ICC and negligible I2R heating in the 6 Ω switch, self-heating remains below 0.1°C - no heatsink or airflow is required in standard PCB layouts.
Is the exposed thermal pad on the UQFN package electrically connected?
Yes. The exposed pad is internally connected to GND and must be soldered to a dedicated PCB ground plane with ≥4 thermal vias (0.3 mm diameter) to ensure mechanical reliability, ESD discharge path integrity, and optimal thermal performance per Diodes' PD-2220 land pattern.
PI3USB221AZUAEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 10-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- USB
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Switch Circuit:
- SPDT
- Number of Channels:
- 1
- On-State Resistance (Max):
- 6Ohm
- Voltage - Supply, Single (V+):
- 2.3V ~ 3.6V
- Voltage - Supply, Dual (V±):
- -
- -3db Bandwidth:
- 1.1GHz
- Features:
- Bi-Directional, USB 2.0
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-UQFN (1.5x2)
PI3USB221AZUAEX FAQ
1.How can I place an order for PI3USB221AZUAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3USB221AZUAEX 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 PI3USB221AZUAEX reliable?
The price and inventory of PI3USB221AZUAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3USB221AZUAEX is usually 5 days.
3.What payment methods are accepted for PI3USB221AZUAEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3USB221AZUAEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3USB221AZUAEX?
PI3USB221AZUAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3USB221AZUAEX 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 PI3USB221AZUAEX?
For technical support, including PI3USB221AZUAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3USB221AZUAEX requirements.
6.How does Aetrix verify that PI3USB221AZUAEX is sourced from the original manufacturer or authorized distributors?
All PI3USB221AZUAEX 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 PI3USB221AZUAEX meets industry standards.
7.What is the process for return or replacement of PI3USB221AZUAEX?
All PI3USB221AZUAEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3USB221AZUAEX, 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 PI3USB221AZUAEX part is unused and in its original packaging.
Return procedure for PI3USB221AZUAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PI3USB221AZUAEX Tags
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TS3USB221AQRSERQ1
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NX3DV2567GU,115
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TS3USB221ERSER
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TC7USB40MU,LF(S2E
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TS3USB30EDGSR
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PI3USB221AZUAEX
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CBTL01023GM,115
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TS3USB30ERSWR
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