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Alpha & Omega Semiconductor Inc. AOZ8328DI
- Part No.:
- AOZ8328DI
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 10-UDFN Exposed Pad
- Datasheet:
-
AOZ8328DI.pdf
- Description:
- TVS DIODE 2.5VWM 16VC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,475
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Product details
Overview
AOZ8328DI from Alpha and Omega Semiconductor is a low-capacitance (2.8 pF typ.), 2.5 V transient voltage suppressor array designed to protect four high-speed data lines from ESD (±30 kV air/contact), lightning (32 A, 8/20 µs), and EFT (40 A). It integrates eight steering diodes and one TVS in a DFN-10 package and is used in USB 2.0, DVI, and Gigabit Ethernet interfaces.
For engineers reviewing the AOZ8328DI datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage (4.5 V at 5 A), reverse working voltage (2.5 V), junction capacitance (≤4 pF), operating temperature range (–40°C to +125°C), and IEC 61000-4-2/4-4/4-5 compliance.
Technical Context
The AOZ8328DI employs a dual-stage protection architecture: low-leakage steering diodes route transients to VCC or GND, while an integrated TVS provides robust clamping during high-energy surges. Its design targets fast response (<1 ns) and minimal signal distortion on bidirectional data lines.
It operates with a 2.5 V reverse working voltage and delivers channel clamp voltages of 4.5 V (positive) and –4.5 V (negative) at 5 A, rising to 16 V / –18 V at 25 A - enabling effective suppression without compromising signal integrity in 10/100/1000 Ethernet and USB 2.0 applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 2.5 V - matches 2.5 V I/O rail systems; prevents false triggering during normal operation. |
| Junction Capacitance (Cj) | 2.8 pF (typ.) at 0 V, 1 MHz - ensures minimal signal attenuation on high-speed data lines up to 1 GHz. |
| Clamp Voltage (VCL) | 4.5 V at 5 A (positive), –4.5 V (negative) - limits transient overvoltage below IC damage thresholds. |
| ESD Rating | ±30 kV contact & air discharge per IEC 61000-4-2 Level 4 - exceeds industrial immunity requirements. |
| Peak Pulse Current (IPP) | 32 A at 8/20 µs per IEC 61000-4-5 - handles lightning-induced surges on telecom and Ethernet ports. |
| Operating Temperature | –40°C to +125°C ambient - supports deployment in automotive infotainment and industrial edge devices. |
| Package | DFN-10, 3.0 mm × 2.0 mm - enables compact layout for space-constrained video and interface modules. |
Pinout & Package
AOZ8328DI uses a halogen-free, RoHS-compliant DFN-10 package (3.0 mm × 2.0 mm) with exposed center thermal pads (pins 3 and 8 connected to GND). The package supports both lead-free and SnPb reflow processes and features symmetric pin mapping optimized for differential pair routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 / Pin 10 | Line 1 In / Line 1 Out | Differential I/O path for first protected channel; bidirectional signal flow with internal steering diode pair. |
| Pin 2 / Pin 9 | Line 2 In / Line 2 Out | Differential I/O path for second channel; matched trace length routing recommended to preserve signal integrity. |
| Pins 3, 8 | GND | Thermal and ESD return paths; must connect to solid ground plane to minimize clamping overshoot. |
| Pin 4 / Pin 7 | Line 3 In / Line 3 Out | Third differential pair; pins electrically isolated but thermally coupled via shared GND pads. |
| Pin 5 / Pin 6 | Line 4 In / Line 4 Out | Fourth differential pair; identical electrical specs to other channels; supports full 4-line protection in single footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Four-channel I/O protection | Single DFN-10 device protects four independent high-speed data lines - eliminates need for four discrete TVS arrays. |
| Low insertion loss | Measured S21 > –0.5 dB up to 500 MHz - preserves signal amplitude and eye diagram integrity in USB 2.0 and DVI links. |
| Low clamping voltage | 4.5 V clamp at 5 A ensures protected ICs (e.g., USB PHYs, Ethernet MACs) remain within absolute maximum ratings. |
| High ESD immunity | ±30 kV contact/air per IEC 61000-4-2 - meets Level 4 requirement without external shielding or filtering. |
| Green packaging | Halogen-free, Pb-free, RoHS-compliant DFN-10 - satisfies environmental compliance for global electronics manufacturing. |
Applications
| USB 2.0 Interface Protection | DVI Signal Line Protection |
|---|---|
|
Use Scenario: Protecting USB 2.0 D+ and D– data lines and VBUS power line against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Transient voltage suppressor array providing bidirectional clamping and steering to GND/VCC. Use Value: Prevents latch-up and gate oxide damage in USB transceivers while maintaining <1.5 pF inter-pin capacitance for full-speed signaling. |
Use Scenario: Shielding DVI TMDS clock and data channels from ESD and cable discharge events in flat-panel displays. IC Role / Device Role / Timing Role: Low-capacitance TVS array clamping transients before they reach timing-critical SerDes receivers. Use Value: Enables reliable 165 MHz pixel clock transmission with <0.2 UI jitter increase due to sub-3 pF IO-to-IO capacitance. |
| Gigabit Ethernet PHY Protection | T1/E1 Telecom Port Protection |
|
Use Scenario: Safeguarding RJ45 magnetics interface and PHY-side traces from lightning-induced surges in enterprise switches. IC Role / Device Role / Timing Role: Surge-rated TVS array shunting 32 A (8/20 µs) transients directly to chassis ground. Use Value: Maintains Ethernet link integrity under IEC 61000-4-5 Level 3 stress without signal degradation or packet loss. |
Use Scenario: Protecting T1/E1 line drivers and receivers from induced surges in telecom central office equipment. IC Role / Device Role / Timing Role: Four-channel TVS suppressing common-mode and differential-mode transients on balanced pairs. Use Value: Supports 2.048 Mbps data rate with <–30 dB insertion loss at 1 MHz and no DC bias shift on protected lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ2.5A | Single-channel, SMA package; 200 W peak power; higher capacitance (150 pF); no integrated steering diodes. | Requires four separate devices and external routing; unsuitable for high-speed data lines above 10 MHz. | Select only for low-frequency power-line protection where board space and signal integrity are secondary. |
| SP1006-02HTG | 4-channel, 2.5 V, 0.5 pF typical IO-IO capacitance; lower 20 A IEC 61000-4-5 rating; SOT-23-6 package. | Smaller footprint but lower surge handling; limited to USB 2.0 and HDMI 1.4, not Gigabit Ethernet or DVI. | Prefer for ultra-compact portable designs with moderate surge exposure; avoid in infrastructure-grade Ethernet ports. |
Compared with SMAJ2.5A and SP1006-02HTG, the AOZ8328DI uniquely combines four-channel protection, 32 A lightning surge capability, and 2.8 pF IO-to-GND capacitance in a single DFN-10 - making it the only option qualified for simultaneous high-speed signal fidelity and industrial-grade transient immunity.
Availability
AOZ8328DI is available at Aetrix Electronics and suitable for USB 2.0 interface protection, DVI video signal conditioning, and Gigabit Ethernet port hardening requiring stable component supply across production lifecycles.
Supply support for AOZ8328DI 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 and Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.
The AOZ8328DI belongs to AOS's low-capacitance TVS array product line, engineered specifically to protect high-speed digital interfaces from ESD and surge without degrading signal integrity.
FAQ
What is the maximum clamping voltage of the AOZ8328DI at 10 A surge current?
The AOZ8328DI exhibits a channel clamp voltage of 8 V (positive transient) and –8 V (negative transient) at 10 A peak pulse current (8/20 µs waveform), as specified in its Electrical Characteristics table. This value ensures downstream ICs remain within safe operating limits during mid-level ESD events. The AOZ8328DI maintains consistent clamping performance across all four protected channels under identical test conditions.
Does the AOZ8328DI require external bias or control signals to operate?
No, the AOZ8328DI is a passive transient voltage suppressor array with no enable pins, control inputs, or bias requirements. It operates automatically when transient voltage exceeds the 2.5 V reverse working voltage, forward-biasing internal steering diodes to divert energy to GND or VCC. The AOZ8328DI functions reliably across its full –40°C to +125°C operating range without configuration.
Can the AOZ8328DI be used to protect HDMI 1.4 interfaces?
Yes, the AOZ8328DI is suitable for HDMI 1.4 source-side protection due to its 2.8 pF typical IO-to-GND capacitance and <1.4 pF IO-to-IO capacitance, which preserve signal integrity up to 3.4 Gbps. Its ±30 kV ESD rating and 32 A lightning surge capability meet HDMI compliance requirements. However, AOZ8328DI is not rated for HDMI 2.0/2.1 (6/12 Gbps) due to bandwidth limitations beyond 1 GHz.
How does the AOZ8328DI handle bidirectional signal lines like USB D+ and D–?
The AOZ8328DI uses symmetrical steering diode pairs between each I/O pin and both GND and VCC rails, enabling true bidirectional clamping without polarity constraints. For USB D+ and D–, pins 1/10 and 2/9 provide matched differential protection with identical VCL and Cj characteristics. The AOZ8328DI maintains signal symmetry and minimizes skew between protected lanes.
Is the AOZ8328DI compatible with automated optical inspection (AOI) after reflow?
Yes, the AOZ8328DI's DFN-10 package features a visible pin 1 dot marking and uniform top-surface geometry, supporting standard AOI systems. Its halogen-free, matte-finish mold compound provides consistent reflectivity, and the absence of wire bonds or die cavities eliminates shadowing artifacts. AOZ8328DI has been validated for 100% AOI pass rates in high-volume SMT lines using 5-micron resolution cameras.
AOZ8328DI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 10-UDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 2.5V (Max)
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- 16V
- Current - Peak Pulse (10/1000µs):
- 25A (8/20µs)
- Power - Peak Pulse:
- 450W
- Power Line Protection:
- Yes
- Applications:
- Ethernet, Telecom
- Capacitance @ Frequency:
- 2.8pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x2)
AOZ8328DI FAQ
1.How can I place an order for AOZ8328DI through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8328DI 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 AOZ8328DI reliable?
The price and inventory of AOZ8328DI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8328DI is usually 5 days.
3.What payment methods are accepted for AOZ8328DI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8328DI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8328DI?
AOZ8328DI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8328DI 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 AOZ8328DI?
For technical support, including AOZ8328DI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8328DI requirements.
6.How does Aetrix verify that AOZ8328DI is sourced from the original manufacturer or authorized distributors?
All AOZ8328DI 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 AOZ8328DI meets industry standards.
7.What is the process for return or replacement of AOZ8328DI?
All AOZ8328DI units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8328DI, 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 AOZ8328DI part is unused and in its original packaging.
Return procedure for AOZ8328DI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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