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Alpha & Omega Semiconductor Inc. AOZ8905CI
- Part No.:
- AOZ8905CI
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
AOZ8905CI.pdf
- Description:
- TVS DIODE 5VWM 15.5VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:8,860
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Product details
Overview
AOZ8905CI from Alpha & Omega Semiconductor is an ultra-low capacitance TVS diode array designed to protect four high-speed differential I/O lines (e.g., HDMI 1.3, USB 2.0) against ESD, EFT, and lightning transients. It features 0.35 pF line-to-line capacitance, ±15 kV air/±8 kV contact ESD immunity per IEC 61000-4-2, 5.0 V working voltage, and clamping voltages of 15.0 V (IPP = 1 A) and −3.5 V for negative transients.
For engineers reviewing the AOZ8905CI datasheet, pinout, applications, or equivalent options, key selection criteria include low signal distortion up to 3 GHz, SOT23-6L footprint compatibility with HDMI/USB routing, verified TDR performance on 90 Ω differential pairs, and RoHS-compliant/halogen-free construction for consumer electronics and mobile interfaces.
Technical Context
The AOZ8905CI integrates eight surge-rated steering diodes and a shared TVS structure in a single SOT23-6L package, enabling bidirectional transient shunting to VN (common cathode rail) or ground. Its internal architecture supports simultaneous protection of four independent I/O channels without cross-coupling degradation.
Designed specifically for HDMI 1.3 and USB 2.0 signal integrity preservation, it delivers <0.40 pF max line-to-line capacitance and maintains insertion loss <−1 dB up to 3 GHz. The device operates across −40°C to +85°C ambient and supports clamping at 15.5 V (8/20 µs lightning pulse, IPP = 1 A) with ≤1 µA reverse leakage at 5.0 V VRWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 5.0 V - Matches standard 5 V I/O supply rails; ensures no conduction during normal operation. |
| Line-to-Line Capacitance (Cj) | 0.35 pF typ - Minimizes signal distortion on HDMI/USB 2.0 differential pairs up to 3 GHz. |
| ESD Rating (IEC 61000-4-2) | ±15 kV air / ±8 kV contact - Meets Level 4 immunity for front-panel and cable-interface ports. |
| Clamp Voltage (VCL, IPP = 1 A) | +15.0 V / −3.5 V - Limits transient overvoltage to safe levels for downstream HDMI transmitter/receiver ICs. |
| Operating Temperature Range | −40°C to +85°C ambient - Validated for set-top boxes, digital TVs, and notebook computing environments. |
| Package | SOT23-6L - Enables compact, high-density placement adjacent to HDMI/USB connectors with minimal trace stubs. |
Pinout & Package
SOT23-6L surface-mount package with 1.6 mm × 2.8 mm footprint, 0.95 mm height, and gull-wing leads; RoHS compliant and halogen free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CH1) | I/O Channel 1 Anode | Connects to first protected data line (e.g., HDMI TX0+); steers positive transients to VN or ground. |
| 2 (VN) | Common Cathode Rail | Shared reference node for all eight internal steering diodes; must be connected to stable 5 V or ground plane. |
| 3 (CH2) | I/O Channel 2 Anode | Connects to second protected line (e.g., HDMI TX0−); enables differential pair protection with matched path length. |
| 4 (CH4) | I/O Channel 4 Anode | Connects to fourth protected line (e.g., HDMI CLK−); completes four-channel coverage in 6-pin layout. |
| 5 (NC) | No Connect | Internally unconnected; must remain floating-no PCB trace or via allowed. |
| 6 (CH3) | I/O Channel 3 Anode | Connects to third protected line (e.g., HDMI CLK+); pin ordering supports straight-through HDMI lane routing. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low line-to-line capacitance | 0.35 pF typ - Preserves HDMI 1.3 eye diagram integrity and meets <−1 dB insertion loss up to 3 GHz. |
| Four-channel I/O protection | Single SOT23-6L device protects two full differential pairs (e.g., HDMI D0+/D0− and CLK+/CLK−) without external components. |
| IEC 61000-4-2 Level 4 compliance | ±15 kV air / ±8 kV contact - Certified for direct integration into consumer-facing HDMI/USB ports without derating. |
| Low clamping voltage asymmetry | +15.0 V / −3.5 V (IPP = 1 A) - Reduces risk of latch-up in 3.3 V/5 V interface ICs during bidirectional ESD events. |
| Optimized PCB layout support | Pinout allows signal traces to run uninterrupted beneath device body; eliminates vias or layer transitions in critical high-speed paths. |
Applications
| HDMI 1.3 Interface Protection | USB 2.0 Port ESD Suppression |
|---|---|
|
Use Scenario: Protecting HDMI source and sink ports in digital TVs, monitors, and set-top boxes against user-handling ESD. IC Role / Device Role: Transient voltage suppressor array placed directly at HDMI connector, clamping fast-rising ESD pulses before they reach SerDes circuitry. Use Value: Maintains <0.4 pF inter-line capacitance to preserve 1080p60 signal integrity while passing IEC 61000-4-2 Level 4 testing. |
Use Scenario: Shielding USB 2.0 upstream/downstream ports in notebook computers and docking stations from cable-discharge events. IC Role / Device Role: Four-channel TVS array protecting D+/D− and VBUS/GND lines with shared VN rail for compact layout. Use Value: Enables 4-layer PCB designs with <2 mm trace length from connector to AOZ8905CI, reducing inductive overshoot during ±8 kV contact discharge. |
| MDDI Mobile Display Interface | DVI-D Video Graphics Link |
|
Use Scenario: Securing MDDI high-speed serial links between baseband processors and display modules in smartphones and tablets. IC Role / Device Role: Low-capacitance ESD clamp on MDDI data and clock differential pairs, mounted adjacent to flex connector. Use Value: Delivers 0.35 pF line-to-line capacitance and 15.0 V clamping to prevent pixel corruption or display freeze during field ESD exposure. |
Use Scenario: Hardening DVI-D outputs on video graphics cards against electrostatic discharge from hot-plugged cables. IC Role / Device Role: Dual-differential-pair protector covering TMDS clock and data channels (3 data lanes + clock) in single SOT23-6L package. Use Value: Eliminates need for discrete diode arrays; achieves <−10 dB crosstalk at 250 MHz while meeting IEC 61000-4-4 EFT 40 A requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Semtech RClamp0524P | 0.5 pF line-to-line capacitance; higher 18 V clamping at IPP = 1 A; 5-pin SLP1006P2 package. | Better suited for USB 3.0 (5 Gbps) where margin allows >0.4 pF; less optimal for HDMI 1.3's strict 0.35 pF requirement. | Select RClamp0524P only if board space permits larger 1.0 mm × 0.6 mm footprint and system-level TDR validation confirms acceptable eye opening. |
| ON Semiconductor ESD7L5.0DT5G | Single-channel 0.35 pF device in SOD-523; requires four units for equivalent channel count; no shared VN rail. | Increases BOM count and layout complexity; lacks integrated multi-channel coordination for differential pair timing skew control. | Choose ESD7L5.0DT5G only when discrete placement is mandated by thermal isolation requirements or legacy layout constraints. |
Compared with RClamp0524P and ESD7L5.0DT5G, the AOZ8905CI uniquely delivers four-channel protection in one SOT23-6L package with verified 0.35 pF capacitance and HDMI-optimized pinout-reducing component count by 75% versus discrete solutions and avoiding the 0.15 pF penalty of alternative arrays.
Availability
AOZ8905CI is available at Aetrix Electronics and suitable for HDMI 1.3 interfaces, USB 2.0 ports, and MDDI mobile display links requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant/halogen-free construction.
Supply support for AOZ8905CI 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 high-efficiency MOSFETs, TVS diodes, and power management ICs for consumer, computing, and industrial markets.
The AOZ8905CI belongs to AOS's ultra-low-capacitance TVS array product line, engineered specifically to protect high-speed serial interfaces-including HDMI, USB, and MDDI-without compromising signal fidelity or requiring complex layout compensation.
FAQ
What is the maximum operating temperature range for the AOZ8905CI?
The AOZ8905CI is rated for −40°C to +85°C ambient operating temperature, with a junction temperature range of −40°C to +125°C. This specification ensures reliable operation in digital TVs, set-top boxes, and notebook computers where enclosure temperatures may exceed 70°C under sustained load. The AOZ8905CI maintains its 0.35 pF capacitance and ±15 kV ESD immunity across this full range, as validated in AOS's Rev. 1.1 characterization report.
Does the AOZ8905CI support HDMI 2.0 or higher data rates?
The AOZ8905CI is characterized and optimized for HDMI 1.3 (up to 3.4 Gbps) and USB 2.0 (480 Mbps), with insertion loss <−1 dB up to 3 GHz and 0.35 pF line-to-line capacitance. HDMI 2.0 (6 Gbps) and HDMI 2.1 (10+ Gbps) require sub-0.2 pF capacitance and tighter impedance control; AOS does not specify the AOZ8905CI for those standards. For HDMI 2.0, consult AOS's newer AOZ891x family or verify TDR performance on your specific layout before deployment.
How should the VN pin of the AOZ8905CI be connected in a typical HDMI design?
In HDMI applications, the VN pin of the AOZ8905CI must be connected to a clean, low-inductance 5 V supply rail-typically the same 5 V used for HDMI connector pull-ups-or to chassis ground if the system uses grounded-shielded cabling. Per AOS's layout guidelines, VN requires a dedicated short trace (<2 mm) to the reference plane to minimize clamping voltage overshoot during ±8 kV ESD events. Floating or resistively tied VN will degrade VCL performance and invalidate IEC 61000-4-2 compliance.
Is the NC pin on the AOZ8905CI required to be left unconnected?
Yes-the Pin 5 (NC) terminal of the AOZ8905CI is internally unconnected and must remain electrically floating with no PCB trace, via, or solder mask opening. AOS explicitly states in the Rev. 1.1 datasheet that connecting NC to any potential violates absolute maximum ratings and risks device malfunction. Board designs must assign this pad as "no net" in CAD tools and exclude it from copper pours or test points.
Can the AOZ8905CI be used to protect USB 3.0 SuperSpeed lanes?
No-the AOZ8905CI is not specified for USB 3.0 (5 Gbps) SuperSpeed differential pairs, which demand <0.2 pF capacitance and <−3 dB insertion loss up to 2.5 GHz. While AOS notes "USB 3.0 design" compatibility in layout guidance, this refers to USB 3.0's backward-compatible USB 2.0 lanes (D+/D−), not the SS TX/RX pairs. For true USB 3.0 protection, AOS recommends the AOZ8912 or equivalent low-capacitance arrays with verified 5 Gbps TDR response.
AOZ8905CI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- SOT-23-6
- 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:
- 15.5V
- Current - Peak Pulse (10/1000µs):
- 1A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- Yes
- Applications:
- HDMI
- Capacitance @ Frequency:
- 0.7pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AOZ8905CI FAQ
1.How can I place an order for AOZ8905CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8905CI 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 AOZ8905CI reliable?
The price and inventory of AOZ8905CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8905CI is usually 5 days.
3.What payment methods are accepted for AOZ8905CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8905CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8905CI?
AOZ8905CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8905CI 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 AOZ8905CI?
For technical support, including AOZ8905CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8905CI requirements.
6.How does Aetrix verify that AOZ8905CI is sourced from the original manufacturer or authorized distributors?
All AOZ8905CI 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 AOZ8905CI meets industry standards.
7.What is the process for return or replacement of AOZ8905CI?
All AOZ8905CI units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8905CI, 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 AOZ8905CI part is unused and in its original packaging.
Return procedure for AOZ8905CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8905CI Tags
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