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Alpha & Omega Semiconductor Inc. AOZ8S321UD4-05
- Part No.:
- AOZ8S321UD4-05
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 10-UFDFN
- Datasheet:
-
AOZ8S321UD4-05.pdf
- Description:
- TVS DIODE 5VWM 7VC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,947
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Product details
Overview
AOZ8S321UD4-05 from Alpha & Omega Semiconductor is a 4-channel ultra-low capacitance transient voltage suppressor (TVS) diode array designed to protect high-speed differential data lines. It delivers 0.15 pF line-to-line capacitance, ±15 kV IEC 61000-4-2 ESD protection, and 5 V operating voltage, enabling signal integrity preservation in HDMI 1.4/2.0 and USB 3.0/3.1 interfaces.
For engineers reviewing the AOZ8S321UD4-05 datasheet, pinout, applications, or equivalent options, key selection considerations include its DFN-10 package layout optimized for flow-through routing, 0.28 pF I/O-to-GND capacitance, clamping voltage of 1.3 V at 1 A TLP, -40°C to +125°C junction temperature range, and compliance with IEC 61000-4-5 (5 A, 8/20 µs).
Technical Context
The AOZ8S321UD4-05 integrates surge-rated steering diodes and a unidirectional TVS in a single DFN-10 package to provide bidirectional ESD clamping on four independent I/O lines. Its internal architecture routes transients to VCC or GND via low-inductance paths, minimizing voltage overshoot during fast-rising ESD events.
Designed specifically for high-speed serial interfaces, it maintains signal fidelity through ultra-low parasitic capacitance (0.15 pF I/O–I/O, 0.28 pF I/O–GND) and supports operation up to 125°C junction temperature while meeting IEC 61000-4-2 (±15 kV contact/air) and IEC 61000-4-5 (5 A, 8/20 µs) immunity standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 5 V - Sets maximum continuous DC operating voltage before leakage increases significantly. |
| Clamping Voltage (VCL) | 1.3 V at 1 A TLP - Limits transient voltage seen by protected ICs during ESD events. |
| Junction Capacitance (CJ) | 0.15 pF I/O–I/O - Enables minimal signal distortion on HDMI/USB 3.x differential pairs. |
| ESD Rating (IEC 61000-4-2) | ±15 kV contact/air - Meets industrial-grade ESD immunity requirements for external connectors. |
| Surge Rating (IEC 61000-4-5) | 5 A, 8/20 µs - Withstands lightning-induced surges on exposed data lines. |
| Operating Temperature | -40°C to +125°C TJ - Supports deployment in automotive infotainment and industrial display environments. |
Pinout & Package
The AOZ8S321UD4-05 is housed in a RoHS-compliant, halogen-free 2.5 mm × 1.0 mm × 0.55 mm DFN-10 package with wettable flank terminations for automated optical inspection. Pins 1, 2, 4, and 5 connect to internal TVS elements; pins 6, 7, 9, and 10 are no-connect (NC) terminals used solely for mechanical stability and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5 | I/O Protection Channel Input | Direct connection points for four high-speed differential signal lines (e.g., HDMI TX/RX pairs). |
| 3, 8 | GND | Dedicated ground terminals providing low-inductance return path for clamped transient current. |
| 6, 7, 9, 10 | No Connect (NC) | Non-functional pads enhancing solder joint reliability and thermal conduction without electrical connection. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Enables straight PCB trace routing under the device-eliminates vias or bends that increase parasitic inductance in HDMI/USB 3.x layouts. |
| Ultra-low I/O–I/O capacitance | 0.15 pF preserves signal rise/fall times and eye diagram integrity on >5 Gbps serial links. |
| Low clamping voltage | 1.3 V at 1 A TLP ensures protected receivers remain within safe input voltage limits during ESD strikes. |
| Integrated steering diodes + TVS | Combines bidirectional transient redirection and unidirectional overvoltage clamping in one monolithic structure. |
Applications
| HDMI 1.4/2.0 Transmitter Protection | USB 3.0/3.1 Host Interface |
|---|---|
Use Scenario: Protecting HDMI source outputs (TX0+/−, TX1+/−, TX2+/−, CLK+/−) on graphics cards or SoC-based video processors. IC Role / Device Role / Timing Role: TVS array placed at connector interface to clamp ESD before signals enter serializer ICs or cable drivers. Use Value: Prevents latch-up or damage to HDMI PHYs while maintaining <0.2 dB insertion loss up to 6 GHz due to 0.15 pF coupling. | Use Scenario: Shielding USB 3.0 SuperSpeed differential pairs (SSTX+/−, SSRX+/−) on laptop motherboard or docking station I/O headers. IC Role / Device Role / Timing Role: Frontline ESD suppression element located directly at USB Type-A/B/Type-C receptacle footprint. Use Value: Maintains USB 3.0 eye mask compliance with ≤0.34 pF I/O–GND capacitance and sub-2 V clamping at 16 A surge. |
| Flat Panel Display Interface | Set-Top Box Video Output |
Use Scenario: Safeguarding V-by-One or LVDS timing-critical pixel clock and data lanes between mainboard and LCD panel. IC Role / Device Role / Timing Role: Signal-line protector positioned adjacent to display connector to minimize stub length and impedance discontinuity. Use Value: Ensures <10 ps jitter contribution and prevents bit errors caused by ESD-induced common-mode noise on balanced pairs. | Use Scenario: Securing HDMI output circuitry in consumer STB designs subject to frequent hot-plug and electrostatic handling. IC Role / Device Role / Timing Role: Secondary-level protection downstream of connector, complementing upstream ferrite beads and common-mode chokes. Use Value: Achieves system-level IEC 61000-4-2 Level 4 compliance without degrading 4K@60Hz video bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J5.0A | Single-channel, 5.0 V VRWM, SMA package, 600 W peak power, 150 pF typical capacitance | Not suitable for multi-lane high-speed interfaces; intended for lower-frequency power/data line protection | Select only when protecting individual DC rails or low-speed signals where capacitance >100× higher is acceptable |
| SP3205-01HTG | 4-channel, 5.0 V VRWM, SOT-23-6 package, 0.3 pF I/O–GND, ±12 kV ESD rating | Limited to USB 2.0/HDMI 1.3 due to higher capacitance and lower ESD robustness than AOZ8S321UD4-05 | Use where board space constraints prevent DFN-10 placement but full HDMI 2.0/USB 3.1 performance is not required |
Compared with SMA6J5.0A and SP3205-01HTG, the AOZ8S321UD4-05 uniquely combines 4-channel integration, 0.15 pF I/O–I/O capacitance, and ±15 kV ESD rating in a compact DFN-10, making it the only option qualified for HDMI 2.0 and USB 3.1 Gen 1 differential pair protection without signal degradation.
Availability
AOZ8S321UD4-05 is available at Aetrix Electronics and suitable for HDMI 2.0 transmitter protection, USB 3.0 host interface hardening, and flat-panel display timing lane safeguarding requiring stable component supply across production lifecycles.
Supply support for AOZ8S321UD4-05 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.
The AOZ8S321UD4-05 belongs to AOS's ultra-low-capacitance TVS array product line, engineered specifically to protect high-bandwidth serial interfaces-including HDMI, USB 3.x, and V-by-One-against ESD and surge without compromising signal integrity.
FAQ
What is the primary function of the AOZ8S321UD4-05?
The AOZ8S321UD4-05 is a 4-channel transient voltage suppressor diode array designed to protect high-speed differential data lines from ESD and surge events. It uses integrated steering diodes and a unidirectional TVS to clamp transients to ground or VCC. Its ultra-low 0.15 pF line-to-line capacitance ensures minimal impact on HDMI 2.0 and USB 3.0 signal integrity. The AOZ8S321UD4-05 achieves ±15 kV IEC 61000-4-2 ESD protection while operating at 5 V VRWM.
Does the AOZ8S321UD4-05 support HDMI 2.0 and USB 3.1 Gen 1?
Yes, the AOZ8S321UD4-05 is explicitly validated for HDMI 2.0 and USB 3.1 Gen 1 applications. Its 0.15 pF I/O–I/O capacitance and 1.3 V clamping voltage at 1 A TLP preserve signal eye diagrams up to 6 Gbps. The DFN-10 flow-through pinout allows direct inline placement on differential pairs without trace detours-critical for maintaining impedance control and minimizing jitter. AOZ8S321UD4-05 meets all ESD and surge requirements specified in HDMI 2.0 and USB 3.1 compliance test plans.
What are the NC pins on the AOZ8S321UD4-05 used for?
Pins 6, 7, 9, and 10 on the AOZ8S321UD4-05 are no-connect (NC) terminals. They serve no electrical function but improve mechanical stability during reflow soldering and enhance thermal conduction from the die to the PCB. Their inclusion allows secure mounting in the 2.5 mm × 1.0 mm DFN-10 package without compromising signal routing. The AOZ8S321UD4-05 datasheet confirms these pins must remain unconnected in circuit design.
How does the AOZ8S321UD4-05 compare to standard TVS diodes in high-speed applications?
Unlike standard TVS diodes-which typically exhibit >100 pF capacitance-the AOZ8S321UD4-05 delivers 0.15 pF I/O–I/O and 0.28 pF I/O–GND, reducing signal attenuation and phase distortion on GHz-range links. Its integrated steering architecture enables faster response (<1 ns) and lower clamping voltage (1.3 V at 1 A) than discrete TVS solutions. The AOZ8S321UD4-05 also features a DFN-10 layout optimized for flow-through routing, eliminating stubs that degrade HDMI/USB 3.x eye patterns.
Is the AOZ8S321UD4-05 compliant with environmental regulations?
Yes, the AOZ8S321UD4-05 is RoHS compliant and halogen-free per AOS Green Product standards. It contains reduced levels of bromine and chlorine compounds and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 requirements. The device is rated for operation from -40°C to +125°C junction temperature and supports lead-free reflow profiles. All AOZ8S321UD4-05 units shipped by Aetrix Electronics carry full material declarations and conflict mineral compliance documentation.
AOZ8S321UD4-05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 10-UFDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 7V
- Current - Peak Pulse (10/1000µs):
- 16A
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- HDMI, USB
- Capacitance @ Frequency:
- 280pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (2.5x1)
AOZ8S321UD4-05 FAQ
1.How can I place an order for AOZ8S321UD4-05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8S321UD4-05 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 AOZ8S321UD4-05 reliable?
The price and inventory of AOZ8S321UD4-05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8S321UD4-05 is usually 5 days.
3.What payment methods are accepted for AOZ8S321UD4-05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8S321UD4-05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8S321UD4-05?
AOZ8S321UD4-05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8S321UD4-05 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 AOZ8S321UD4-05?
For technical support, including AOZ8S321UD4-05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8S321UD4-05 requirements.
6.How does Aetrix verify that AOZ8S321UD4-05 is sourced from the original manufacturer or authorized distributors?
All AOZ8S321UD4-05 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 AOZ8S321UD4-05 meets industry standards.
7.What is the process for return or replacement of AOZ8S321UD4-05?
All AOZ8S321UD4-05 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8S321UD4-05, 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 AOZ8S321UD4-05 part is unused and in its original packaging.
Return procedure for AOZ8S321UD4-05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8S321UD4-05 Tags
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