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Alpha & Omega Semiconductor Inc. AOZ8304DIL
- Part No.:
- AOZ8304DIL
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 10-UFDFN Exposed Pad
- Datasheet:
-
AOZ8304DIL.pdf
- Description:
- TVS DIODE 3.3VWM 10VC 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,690
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Product details
Overview
AOZ8304DIL from Alpha & Omega Semiconductor is a low-capacitance 3.3V TVS diode array designed to protect four high-speed data lines against ESD (±24kV air/contact), EFT (40A), and lightning surges (25A). It features eight steering diodes plus one TVS in a DFN-10 package, with 1.25pF I/O-to-GND capacitance and clamping voltage of 7.0V at 5A, enabling use in USB 2.0 and Gigabit Ethernet interfaces.
For engineers reviewing the AOZ8304DIL datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated I/O protection topology, real-world clamping behavior under transient stress, and direct replacement guidance for legacy design support.
Technical Context
The AOZ8304DIL integrates eight surge-rated steering diodes and one bidirectional TVS in a single DFN-10 package. Its architecture routes transients from any protected I/O line (pins 1,3,7,9) to VP (pin 5) or GND (center tab), enabling dual-path clamping at 3.3V operating voltage.
It meets IEC 61000-4-2 Level 4 (±24kV), IEC 61000-4-4 (40A EFT), and IEC 61000-4-5 (25A lightning) standards. Clamping performance is specified at 100ns TLP pulses, with VCL = 7.0V/–4.0V at IPP = 5A and 14.0V/–8.0V at IPP = 25A, confirming robust overvoltage suppression across full surge range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 3.3V - Matches standard 3.3V I/O rail; ensures no leakage during normal operation. |
| Junction Capacitance (Cj) | 1.25pF @ 0V, 1MHz - Enables signal integrity preservation up to >1GHz in USB 2.0 and DVI applications. |
| Clamp Voltage (VCL) | 7.0V / –4.0V @ 5A, 100ns - Limits transient overshoot below IC damage thresholds for protected PHYs. |
| ESD Rating | ±24kV contact/air per IEC 61000-4-2 - Exceeds Level 4 immunity requirement for industrial and telecom ports. |
| Peak Pulse Current (IPP) | 25A @ 8/20µs - Supports lightning surge suppression per IEC 61000-4-5 for Ethernet and T1/E1 interfaces. |
| Operating Temperature | –40°C to +85°C - Validated for deployment in commercial and industrial ambient environments. |
Pinout & Package
AOZ8304DIL uses a RoHS-compliant, halogen-free DFN-10 package measuring 2.6mm × 2.6mm with exposed center-tab ground pad. The package supports both lead-free and SnPb reflow processes and operates across –40°C to +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 7, 9 | I/O Line Terminals | Four independent protected data lines; each connects to one differential pair (e.g., TRD0+/–, TRD1+/–). |
| 2, 4, 6, 8, 10 | No Connection | Unbonded pins; must remain unconnected on PCB to avoid parasitic coupling or thermal stress. |
| 5 | VP (Voltage Protection Rail) | Bias reference node for steering diodes; must be connected to clean 3.3V supply via low-inductance path. |
| Center Tab | GND (Thermal & Electrical Ground) | Primary return path for surge current; requires solid thermal pad connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Four-line I/O protection | Simultaneous clamping of two differential pairs (e.g., USB D+/D– and VBUS, or Ethernet TRD0–3 pairs) within one footprint. |
| Low 1.25pF I/O-to-GND capacitance | Minimizes signal distortion and insertion loss in high-speed interfaces up to 480Mbps (USB 2.0) and 1.25Gbps (Gigabit Ethernet). |
| Dual-path transient routing | Steering diodes divert surges either to VP (3.3V rail) or GND, reducing dependency on system-level power rail stability. |
| ±24kV ESD immunity | Validated per IEC 61000-4-2 Level 4 - eliminates need for secondary board-level ESD mitigation in certified end equipment. |
| Green RoHS-compliant construction | Halogen-free DFN package with Pb-free terminations - satisfies environmental compliance for global electronics manufacturing. |
Applications
| 10/100/1000 Ethernet Port Protection | USB 2.0 Interface Protection |
|---|---|
Use Scenario: Protecting RJ45 connector data lines (TRD0+/- through TRD3+/-) in Gigabit Ethernet controllers against ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Transient voltage suppressor array providing bidirectional clamping and steering functionality for four differential signal pairs. Use Value: Prevents PHY latch-up or damage while maintaining <0.5dB insertion loss at 100MHz, preserving signal integrity without requiring layout redesign. |
Use Scenario: Safeguarding USB 2.0 D+, D–, and VBUS lines from user-handling ESD events and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance TVS array delivering simultaneous protection for data and power lines in a single DFN footprint. Use Value: Enables full-speed USB 2.0 compliance (480Mbps) with 1.25pF loading, avoiding signal rise-time degradation or eye-diagram closure. |
| DVI Signal Path Protection | T1/E1 Telecom Port Protection |
Use Scenario: Shielding DVI TMDS clock and data channels from ESD during cable insertion or field operation in flat-panel displays. IC Role / Device Role / Timing Role: High-frequency transient suppressor with sub-1.3pF capacitance per channel, placed at display interface connector. Use Value: Maintains pixel-clock fidelity up to 165MHz by limiting capacitive loading and ensuring <7V clamping during ±24kV contact discharge. |
Use Scenario: Hardening T1/E1 line drivers and receivers against induced surges in telecom central office and CPE equipment. IC Role / Device Role / Timing Role: Surge-rated TVS array meeting IEC 61000-4-5 (25A, 8/20µs) for balanced line protection. Use Value: Delivers 14V clamping at 25A peak pulse, protecting line transceivers without compromising jitter-sensitive timing recovery circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AOZ8318DI | Successor device with identical DFN-10 footprint, same VRWM (3.3V), but improved VCL (6.5V @ 5A) and lower Cj (0.9pF). | Validated for new designs targeting higher-speed interfaces (e.g., USB 3.0 Gen1 edge cases) and tighter clamping margins. | Select AOZ8318DI for new designs; AOZ8304DIL remains viable for legacy repair or cost-sensitive replacements where 1.25pF and 7.0V clamping are acceptable. |
| SMA6J33A | Discrete 3.3V unidirectional TVS diode (SMA package); no integrated steering diodes or multi-line capability. | Requires four separate devices plus external bias network to replicate AOZ8304DIL's four-line protection function. | Use SMA6J33A only when board space allows discrete implementation and system-level VP rail is unavailable or unstable. |
Compared with AOZ8304DIL, AOZ8318DI offers lower capacitance and tighter clamping for next-generation interfaces, while SMA6J33A provides basic unidirectional protection but lacks integrated multi-line steering - making AOZ8304DIL uniquely suited for compact, four-line ESD hardening without layout expansion.
Availability
AOZ8304DIL is available at Aetrix Electronics and suitable for 10/100/1000 Ethernet port protection, USB 2.0 interface safeguarding, and DVI signal path hardening requiring stable component supply across industrial and telecom production cycles.
Supply support for AOZ8304DIL 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 AOZ8304DIL belongs to AOS's low-capacitance TVS array product line, engineered specifically for high-speed digital interface protection where ESD robustness, minimal signal loading, and compact integration are mandatory.
FAQ
What is the primary circuit role of the AOZ8304DIL in a system?
The AOZ8304DIL serves as a multi-line transient voltage suppressor array that protects four high-speed data lines by steering ESD and surge currents away from sensitive ICs toward VP or GND. Its internal steering diodes and TVS structure enable bidirectional clamping at 3.3V, making AOZ8304DIL essential for safeguarding Ethernet PHYs, USB transceivers, and DVI receivers without degrading signal integrity.
Does the AOZ8304DIL require an external bias supply, and how is VP used?
Yes - the AOZ8304DIL requires a clean 3.3V supply connected to pin 5 (VP) to establish the clamping reference. During positive transients, steering diodes conduct from I/O pins to VP; during negative transients, they conduct to GND. This dual-path architecture means AOZ8304DIL depends on a stable VP rail - decoupling VP with a 1µF ceramic capacitor near the device is critical for optimal clamping performance.
Can the AOZ8304DIL replace discrete TVS diodes in existing layouts?
Yes, but only if the layout accommodates its DFN-10 footprint (2.6mm × 2.6mm) and accounts for its unique pinout: four active I/O pins (1,3,7,9), five NC pins (2,4,6,8,10), VP on pin 5, and center-tab GND. Unlike discrete solutions, AOZ8304DIL integrates all eight steering diodes and one TVS in one package - eliminating four separate devices and associated routing, provided VP and GND connections are properly implemented.
What is the maximum surge current rating for the AOZ8304DIL, and under what waveform?
The AOZ8304DIL is rated for 25A peak pulse current under an 8/20µs lightning surge waveform per IEC 61000-4-5. Its clamping voltage rises to 14.0V (positive) and –8.0V (negative) at this level, confirmed by testing with 100ns TLP pulses. This rating applies to any single I/O pin referenced to GND, with VP held at 3.3V - validating AOZ8304DIL for telecom and industrial port-level surge immunity.
Is the AOZ8304DIL suitable for new designs, or is it obsolete?
The AOZ8304DIL is marked "Not recommended for new designs" in its official datasheet, with AOZ8318DI designated as its direct replacement. However, AOZ8304DIL remains fully manufacturable and supported for legacy repair, second-source requirements, and cost-sensitive production runs where its 1.25pF capacitance and 7.0V clamping at 5A meet system specifications - making it viable for ongoing use where redesign is impractical.
AOZ8304DIL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 10-UFDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.5V
- Voltage - Clamping (Max) @ Ipp:
- 10V
- Current - Peak Pulse (10/1000µs):
- 25A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- Yes
- Applications:
- Ethernet, Telecom
- Capacitance @ Frequency:
- 5pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (2.6x2.6)
AOZ8304DIL FAQ
1.How can I place an order for AOZ8304DIL through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8304DIL 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 AOZ8304DIL reliable?
The price and inventory of AOZ8304DIL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8304DIL is usually 5 days.
3.What payment methods are accepted for AOZ8304DIL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8304DIL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8304DIL?
AOZ8304DIL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8304DIL 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 AOZ8304DIL?
For technical support, including AOZ8304DIL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8304DIL requirements.
6.How does Aetrix verify that AOZ8304DIL is sourced from the original manufacturer or authorized distributors?
All AOZ8304DIL 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 AOZ8304DIL meets industry standards.
7.What is the process for return or replacement of AOZ8304DIL?
All AOZ8304DIL units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8304DIL, 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 AOZ8304DIL part is unused and in its original packaging.
Return procedure for AOZ8304DIL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8304DIL Tags
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