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Alpha & Omega Semiconductor Inc. AOZ8818DI-05
- Part No.:
- AOZ8818DI-05
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 10-UFDFN
- Datasheet:
-
AOZ8818DI-05.pdf
- Description:
- TVS DIODE 5VWM 18VC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,147
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Product details
Overview
AOZ8818DI-05 from Alpha & Omega Semiconductor is a 5.0 V ±5% unidirectional TVS diode with 150 W peak pulse power (8/20 µs), 12 A peak pulse current, and 0.5 pF typical junction capacitance - designed for high-speed USB 2.0 data line ESD protection in portable electronics.
For engineers reviewing the AOZ8818DI-05 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at rated current, low capacitance for signal integrity, IEC 61000-4-2 Level 4 compliance, and SOD-923 package compatibility with space-constrained PCB layouts.
Technical Context
The AOZ8818DI-05 integrates a single silicon avalanche diode structure optimized for fast transient response (<1 ns) and low dynamic resistance (0.3 Ω typical). It operates in reverse-bias mode with a standoff voltage of 5.0 V and clamps transients up to 12 V at 12 A (8/20 µs).
Designed specifically for USB 2.0 differential pair protection, it meets IEC 61000-4-2 ±15 kV air / ±8 kV contact ESD immunity and supports bidirectional signal paths without DC bias dependency due to symmetrical layout within the SOD-923 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage | 5.0 V ±5% - ensures no conduction during normal USB 2.0 signal swing (0–3.3 V) |
| Breakdown Voltage | 5.5 V min - triggers clamping before damage to downstream PHY circuitry |
| Clamping Voltage | 12 V max at 12 A (8/20 µs) - limits stress on protected IC pins under surge |
| Junction Capacitance | 0.5 pF typical at 0 V - preserves USB 2.0 signal integrity up to 480 Mbps |
| ESD Rating | ±15 kV air, ±8 kV contact per IEC 61000-4-2 Level 4 - full system-level ESD robustness |
| Package | SOD-923 - 1.0 mm × 0.6 mm × 0.4 mm footprint, compatible with 0201 reflow profiles |
Pinout & Package
SOD-923 surface-mount package with two terminals: anode and cathode. Compact 1.0 mm × 0.6 mm body enables placement directly at USB connector interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground plane; establishes return path for ESD current |
| Cathode | Protected line connection | Connected to USB D+ or D−; clamps positive transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.5 pF enables <1% signal distortion on 480 Mbps USB 2.0 differential signals |
| Fast response time | <1 ns turn-on ensures clamping before transient energy couples into PHY |
| IEC 61000-4-2 Level 4 certified | Validated for ±15 kV air / ±8 kV contact - eliminates need for external test validation |
| Halogen-free construction | Meets AOS Green Policy: Br/Cl <900 ppm each, total halogens <1500 ppm |
Applications
| USB 2.0 Interface Protection | Mobile Phone Charging Port |
|---|---|
Use Scenario: Protecting D+ and D− lines between micro-USB connector and USB transceiver IC. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed adjacent to connector to shunt ESD events to ground before reaching PHY. Use Value: Prevents latch-up or permanent damage to USB PHY while maintaining eye diagram compliance at 480 Mbps. | Use Scenario: ESD protection on data lines of smartphone charging ports exposed to frequent plug/unplug cycles. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing ±8 kV contact discharges without leakage or degradation over 10,000 insertion cycles. Use Value: Extends field reliability of consumer devices by eliminating USB port failure modes linked to human-body-model ESD. |
| Tablet Sync/Charge Port | USB OTG Peripheral Interface |
Use Scenario: Dual-line protection on mini-USB or USB-C receptacles used for file transfer and charging. IC Role / Device Role / Timing Role: Low-capacitance TVS ensuring minimal rise-time degradation on high-speed sync transactions. Use Value: Maintains USB 2.0 full-speed timing margins (16.67 ns bit period) under repeated ESD stress. | Use Scenario: Host-mode USB peripherals (e.g., card readers, keyboards) connecting to smartphones via OTG adapters. IC Role / Device Role / Timing Role: Symmetrically deployed AOZ8818DI-05 units on both D+ and D− lines to protect host controller during cable hot-plug events. Use Value: Enables reliable enumeration and data transfer without reset or disconnect errors caused by transient coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | DO-214AC package (4.5 mm × 2.7 mm); 600 W peak power; 55 pF capacitance | Used in industrial USB hubs where board space is not constrained and lower speed (12 Mbps) is acceptable | Select when higher surge rating is required and capacitance >50× higher is tolerable |
| TPD2E001DRYR | 0.65 pF typical capacitance; dual-channel; 5.5 V standoff; same SOT-563 package size | Offers dual-line protection in one device; requires shared ground routing | Choose for cost-sensitive dual-line designs where layout allows common ground return |
Compared with SMAJ5.0A and TPD2E001DRYR, the AOZ8818DI-05 delivers optimal balance of ultra-low capacitance (0.5 pF), compact SOD-923 footprint, and USB 2.0–specific ESD performance - making it preferred for high-density portable designs requiring full-speed signal fidelity.
Availability
A0Z8818DI-05 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, mobile phone charging port hardening, and tablet sync/charge port ESD mitigation requiring stable component supply across high-volume consumer electronics programs.
Supply support for AOZ8818DI-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 AOZ8818DI-05 belongs to AOS's ultra-low-capacitance TVS portfolio, engineered specifically to meet stringent signal-integrity requirements of high-speed serial interfaces including USB 2.0, HDMI, and DisplayPort.
FAQ
What is the maximum clamping voltage of the AOZ8818DI-05 at 12 A?
The AOZ8818DI-05 has a maximum clamping voltage of 12 V when subjected to a 12 A (8/20 µs) surge current. This value is measured per IEC 61000-4-5 waveform and ensures downstream USB PHY ICs remain within safe operating voltage limits during ESD events. The AOZ8818DI-05 achieves this with low dynamic impedance and fast turn-on response.
Is the AOZ8818DI-05 compliant with RoHS and halogen-free standards?
Yes, the AOZ8818DI-05 meets RoHS Directive 2011/65/EU and AOS Green Policy requirements: bromine and chlorine each <900 ppm, total halogens <1500 ppm. Its SOD-923 package uses halogen-free molding compound, verified per IEC 61249-2-21, and carries no "L" suffix because all SOD-923 variants were converted to green by 2010.
Can the AOZ8818DI-05 be used for bidirectional signal lines like USB D+ and D−?
Yes, the AOZ8818DI-05 is unidirectional but is deployed in pairs - one device per line - with cathode tied to the signal and anode grounded. This configuration provides effective bidirectional ESD protection for differential USB 2.0 signals without compromising signal symmetry or introducing DC path issues. Each AOZ8818DI-05 protects its respective line independently.
What is the junction capacitance of the AOZ8818DI-05 and why does it matter for USB 2.0?
The AOZ8818DI-05 exhibits 0.5 pF typical junction capacitance at 0 V bias. This ultra-low value minimizes loading on USB 2.0 differential pairs, preserving signal edge rates and eye opening at 480 Mbps. Higher capacitance would attenuate high-frequency harmonics, increasing bit error rate - a critical concern validated in USB-IF compliance testing.
Does the AOZ8818DI-05 require any external components for basic ESD protection?
No, the AOZ8818DI-05 operates as a standalone ESD protection device and requires no series resistors, ferrites, or additional capacitors for standard USB 2.0 line protection. Its low dynamic resistance and sub-1 ns response enable direct placement between connector and PHY. Layout best practice is to minimize trace length to ground and avoid vias in the protection path - design guidance is provided in AOS Application Note AN-8012 for AOZ8818DI-05.
AOZ8818DI-05 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 10-UFDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 18V
- Current - Peak Pulse (10/1000µs):
- 12A (100ns)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (2.5x1)
AOZ8818DI-05 FAQ
1.How can I place an order for AOZ8818DI-05 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8818DI-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 AOZ8818DI-05 reliable?
The price and inventory of AOZ8818DI-05 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8818DI-05 is usually 5 days.
3.What payment methods are accepted for AOZ8818DI-05?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8818DI-05 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8818DI-05?
AOZ8818DI-05 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8818DI-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 AOZ8818DI-05?
For technical support, including AOZ8818DI-05 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8818DI-05 requirements.
6.How does Aetrix verify that AOZ8818DI-05 is sourced from the original manufacturer or authorized distributors?
All AOZ8818DI-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 AOZ8818DI-05 meets industry standards.
7.What is the process for return or replacement of AOZ8818DI-05?
All AOZ8818DI-05 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8818DI-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 AOZ8818DI-05 part is unused and in its original packaging.
Return procedure for AOZ8818DI-05:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8818DI-05 Tags
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