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Alpha & Omega Semiconductor Inc. AOZ8904HI
- Part No.:
- AOZ8904HI
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
AOZ8904HI.pdf
- Description:
- TVS DIODE 5.5VWM 18VC SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,356
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Product details
Overview
AOZ8904HI from Alpha and Omega Semiconductor is an ultra-low capacitance transient voltage suppressor (TVS) array designed to protect four high-speed data lines from ESD and lightning surges. It features 1.3 pF junction capacitance, ±24 kV IEC 61000-4-2 contact/air ESD rating, 5.5 V reverse working voltage, and clamps transients to ≤11.0 V at 1 A for positive events - deployed in USB 2.0 port protection.
For engineers reviewing the AOZ8904HI datasheet, pinout, applications, or equivalent options, key selection criteria include channel clamp voltage under 12 A surge, I/O-to-ground insertion loss < –6 dB up to 1 GHz, matching input capacitance ≤0.03 pF across channels, and SC-70-6 package compatibility with high-density PCB layouts.
Technical Context
The AOZ8904HI integrates eight steering diodes and one TVS element in a single SC-70-6 package to protect four bidirectional I/O lines. Its architecture routes transient energy either to VP (pin 5) or ground via low-inductance internal paths, enabling clamping within 100 ns at peak currents up to 12 A.
It operates with a 5.0 V nominal supply and supports DC bias on VP (pin 5) at 3.3 V or floating, directly affecting measured junction capacitance (1.3 pF at VR = 0 V, VP = 3.3 V) and insertion loss performance across USB 2.0 bandwidth (up to 480 Mbps).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 5.5 V - sets maximum continuous DC operating voltage before leakage exceeds 1 µA |
| Junction Capacitance (Cj) | 1.3 pF @ 1 MHz, VR = 0 V - ensures minimal signal distortion on USB 2.0 data lines |
| Channel Clamp Voltage (VCL) | 11.0 V @ IPP = 1 A - limits voltage seen by protected IC during ESD event |
| ESD Rating (IEC 61000-4-2) | ±24 kV air & contact - exceeds Level 4 immunity requirement for industrial end equipment |
| Peak Pulse Current (IPP) | 4 A @ 8/20 µs - sustains lightning-surge energy without degradation |
| Operating Temperature Range | –40°C to +85°C ambient - validated for consumer and industrial enclosure environments |
Pinout & Package
AOZ8904HI is housed in a RoHS-compliant, halogen-free SC-70-6 package (2.2 mm × 1.35 mm × 1.1 mm), optimized for space-constrained USB and display interface routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CH1) | I/O Channel 1 Anode | Steers positive transients toward VP or negative transients toward GND |
| 2 (VN) | Negative Reference / Ground Return | Common cathode node for all four channels' negative clamping path |
| 3 (CH2) | I/O Channel 2 Anode | Independent high-speed data line protection node, matched capacitance |
| 4 (CH4) | I/O Channel 4 Anode | Supports full four-line protection without external component duplication |
| 5 (VP) | Positive Supply Reference | Biasable at 3.3 V or left floating to optimize Cj and insertion loss per application |
| 6 (CH3) | I/O Channel 3 Anode | Enables simultaneous protection of D+/D– and auxiliary signals in compact layout |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low inter-channel capacitance mismatch | ΔCj ≤ 0.03 pF ensures uniform signal integrity across all four protected lines |
| Low insertion loss at high frequency | S21 > –6 dB up to 1 GHz with VP biased at 3.3 V - preserves USB 2.0 eye diagram |
| Integrated dual-path clamping | Simultaneous VP-referenced and VN-referenced conduction eliminates need for external TVS diodes |
| ESD robustness beyond IEC standard | ±24 kV contact/air rating - provides margin for field-repair scenarios and handling stress |
Applications
| USB 2.0 Port Protection | DVI Interface Protection |
|---|---|
Use Scenario: Protecting downstream USB 2.0 host ports against user-handling ESD and cable-induced surges. IC Role / Device Role / Timing Role: Bidirectional transient shunt placed between D+/D– and VBUS/GND, clamping within 100 ns. Use Value: Maintains 480 Mbps data integrity with <1.3 pF loading and <11 V clamping at 1 A surge current. | Use Scenario: Shielding DVI TMDS clock and data pairs from ESD during hot-plug connection. IC Role / Device Role / Timing Role: Four-channel I/O protector applied to three TMDS data lanes and one clock lane. Use Value: Prevents pixel corruption and link dropouts by limiting transient overshoot to ≤14 V at 5 A peak pulse. |
| Video Graphics Card I/O | Flat Panel Display Interface |
Use Scenario: Securing PCIe-based GPU output interfaces exposed on rear I/O brackets. IC Role / Device Role / Timing Role: Frontline ESD guard on HDMI/DVI output traces routed near metal chassis edges. Use Value: Reduces board-level failure rate by absorbing ±24 kV contact discharges before reaching level-shifter ICs. | Use Scenario: Safeguarding LVDS or RSDS video bus lines connecting mainboard to LCD panel flex cables. IC Role / Device Role / Timing Role: Low-capacitance clamp on differential video pairs to preserve common-mode rejection. Use Value: Enables reliable 1080p60 transmission with <0.03 pF channel-to-channel capacitance skew. |
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 VBR, 600 W peak power, SMC package - higher capacitance (≈40 pF) | Not suitable for multi-line high-speed data; used for power rail protection only | Select when protecting 5 V supply rails rather than four differential data lines |
| SP1003-04UTG | Four-channel, 5.0 V VRWM, 0.35 pF typical Cj, SOT-23-6 - lower capacitance but rated only to ±15 kV ESD | Limited to lower ESD threat environments; lacks 4 A lightning surge rating | Choose where ultra-low capacitance is critical and IEC Level 4 ESD is not required |
Compared with SMA6J5.0A and SP1003-04UTG, AOZ8904HI uniquely balances ±24 kV ESD immunity, 1.3 pF capacitance, and four-channel integration in SC-70-6 - making it optimal for space-constrained, high-reliability USB/DVI interfaces where both speed and ruggedness are mandatory.
Availability
AOZ8904HI is available at Aetrix Electronics and suitable for USB 2.0 port protection, DVI interface hardening, and flat panel display interface designs requiring stable component supply and long-term lifecycle support.
Supply support for AOZ8904HI 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 AOZ8904HI belongs to AOS's ultra-low capacitance TVS array product line, engineered specifically for high-speed digital interface protection where signal fidelity and ESD survivability must coexist.
FAQ
What is the maximum clamping voltage of AOZ8904HI at 5 A peak pulse current?
The AOZ8904HI exhibits a maximum positive clamping voltage of 14.00 V and a maximum negative clamping voltage of –3.50 V at 5 A peak pulse current (tp = 100 ns), measured per I/O pin to ground under specified TLP test conditions. This performance ensures downstream USB transceivers remain within safe operating voltage margins during surge events. The AOZ8904HI maintains consistent clamping behavior across all four channels due to matched internal diode characteristics.
Does AOZ8904HI require external biasing on the VP pin?
No, AOZ8904HI supports two operational modes: VP (pin 5) may be left floating or biased at 3.3 V, depending on system requirements. When floating, junction capacitance is 1.3 pF; when biased at 3.3 V, insertion loss improves across high-frequency bands. The AOZ8904HI datasheet specifies both configurations with distinct S21 and Cj values - no external components are needed to configure either mode.
Can AOZ8904HI protect USB 2.0 D+ and D– lines simultaneously?
Yes, AOZ8904HI is explicitly designed to protect four independent I/O lines, including differential pairs like USB 2.0 D+ and D–. Pins 1, 3, 4, and 6 serve as anode terminals for each channel, while pins 2 (VN) and 5 (VP) provide shared reference paths. The AOZ8904HI's matched channel capacitance (ΔCj ≤ 0.03 pF) preserves differential signal symmetry critical for USB 2.0 eye diagram compliance.
What is the operating temperature range for AOZ8904HI?
The AOZ8904HI is rated for operation across an ambient temperature range of –40°C to +85°C, with a junction temperature limit of –40°C to +125°C. This range supports deployment in industrial enclosures, automotive infotainment front-ends, and consumer electronics without derating. The AOZ8904HI's thermal performance has been validated under sustained 1 A transient conditions within this envelope.
Is AOZ8904HI compliant with RoHS and halogen-free standards?
Yes, AOZ8904HI is both RoHS compliant and halogen-free per AOS Green Policy, using reduced levels of bromine and chlorine. It meets JEDEC J-STD-709B requirements for environmentally conscious manufacturing. The AOZ8904HI packaging and die construction contain no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE).
AOZ8904HI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.5V (Max)
- Voltage - Breakdown (Min):
- 6.6V
- Voltage - Clamping (Max) @ Ipp:
- 18V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 50W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1.25pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
AOZ8904HI FAQ
1.How can I place an order for AOZ8904HI through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8904HI 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 AOZ8904HI reliable?
The price and inventory of AOZ8904HI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8904HI is usually 5 days.
3.What payment methods are accepted for AOZ8904HI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8904HI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8904HI?
AOZ8904HI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8904HI 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 AOZ8904HI?
For technical support, including AOZ8904HI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8904HI requirements.
6.How does Aetrix verify that AOZ8904HI is sourced from the original manufacturer or authorized distributors?
All AOZ8904HI 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 AOZ8904HI meets industry standards.
7.What is the process for return or replacement of AOZ8904HI?
All AOZ8904HI units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8904HI, 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 AOZ8904HI part is unused and in its original packaging.
Return procedure for AOZ8904HI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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