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Alpha & Omega Semiconductor Inc. AOZ8914CI
- Part No.:
- AOZ8914CI
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
AOZ8914CI.pdf
- Description:
- TVS DIODE
- Quantity:
- Payment:
- Shipping:
Inventory:7,628
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Product details
Overview
AOZ8914CI 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, lightning, and EFT transients. It features 0.7–1.5 pF junction capacitance, ±24 kV IEC 61000-4-2 contact ESD rating, 5.5 V reverse working voltage, and clamps at 12.5 V (IPP = 1 A) for USB 2.0 and DVI signal line protection.
For engineers reviewing the AOZ8914CI datasheet, pinout, applications, or equivalent options, key selection criteria include channel clamp voltage under 12.5 V at 1 A, sub-1.5 pF I/O-to-ground capacitance, SOT-23-6 footprint compatibility, and compliance with IEC 61000-4-2 Level 4, IEC 61000-4-5 (3 A), and HBM ±24 kV standards.
Technical Context
The AOZ8914CI integrates eight surge-rated steering diodes and a TVS element in a single SOT-23-6 package to protect four bidirectional I/O lines. Its architecture routes transients to VN (pin 2) or ground (pin 5) via low-capacitance diode paths, enabling fast response without signal distortion.
It operates over –40°C to +85°C ambient, supports 5.0 V nominal system voltage, and maintains <1 µA reverse leakage at 5 V VRWM. Clamping performance is characterized using 100 ns TLP pulses, with VCL rising from 12.5 V (1 A) to 22.0 V (12 A) across defined surge currents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Working Voltage (VRWM) | 5.5 V - sets maximum continuous DC operating voltage before conduction begins on protected lines |
| Junction Capacitance (Cj) | 0.7–1.5 pF - ensures minimal signal integrity impact on USB 2.0 (480 Mbps) and DVI data lanes |
| ESD Rating (IEC 61000-4-2) | ±30 kV air / ±24 kV contact - exceeds Level 4 immunity requirements for industrial and consumer interfaces |
| Clamp Voltage (VCL) | 12.5 V @ 1 A - limits transient overshoot to safe levels for 5 V-tolerant PHY receivers |
| Peak Pulse Current (IPP) | 3 A (8/20 µs) - sustains lightning-surge energy per IEC 61000-4-5 without degradation |
| Package | SOT-23-6 - surface-mount footprint compatible with automated assembly and space-constrained I/O connectors |
Pinout & Package
SOT-23-6 package with exposed pad not present; 1.3 mm × 2.9 mm × 1.0 mm body height; RoHS-compliant, green, Pb-free construction rated for –40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CH1) | Protected I/O Channel 1 | Input/output line steered to VN or GND during transient events |
| 2 (VN) | Steering Node / Positive Rail | Common connection point for internal diode anodes; tied to +5 V supply for positive transient diversion |
| 3 (CH2) | Protected I/O Channel 2 | Second bidirectional data line with matched capacitance and clamping behavior |
| 4 (CH4) | Protected I/O Channel 4 | Fourth independent I/O path; pin 4 used for CH4 per top-view diagram |
| 5 (NC) | No Connect | Internally unconnected terminal; must remain floating per datasheet |
| 6 (CH3) | Protected I/O Channel 3 | Third data line; pin 6 assigned to CH3 in SOT-23-6 top-view configuration |
Key Features
| Feature | Design Value |
|---|---|
| Four-channel I/O protection | Simultaneously safeguards two differential pairs (e.g., USB D+/D− and VBUS/GND or DVI TMDS channels) in one compact device |
| Ultra-low channel capacitance matching | ΔCj ≤ 0.03 pF ensures balanced signal propagation delay across all four protected lines |
| Low clamping voltage at 1 A | VCL = 12.5 V enables reliable protection of 5 V logic without overstressing downstream receivers |
| IEC 61000-4-4 EFT immunity | 40 A (5/50 ns) rating provides robust defense against burst-induced coupling on external cables |
| Single-supply steering architecture | Uses only VN (pin 2) and GND (pin 5) - no separate bias rail required for bidirectional clamping |
Applications
| USB 2.0 Port Protection | DVI Interface Protection |
|---|---|
Use Scenario: Protecting upstream/downstream USB 2.0 ports on host controllers or hubs against ESD from cable insertion and handling. IC Role / Device Role / Timing Role: TVS array placed at connector edge to clamp transients before they reach USB PHY ICs. Use Value: 0.7–1.5 pF capacitance prevents signal rise-time degradation at 480 Mbps; ±24 kV contact ESD rating meets end-equipment compliance requirements. | Use Scenario: Shielding DVI TMDS clock and data channels from ESD and cable discharge events on flat-panel display interfaces. IC Role / Device Role / Timing Role: Four-channel clamping device applied to three TMDS data pairs plus clock line (or dual-link configurations). Use Value: Matched channel capacitance (ΔCj ≤ 0.03 pF) preserves differential skew; 12.5 V clamp voltage protects 5 V-tolerant DVI receivers. |
| Video Graphics Card I/O | Monitor & Flat Panel Display |
Use Scenario: ESD hardening of external video output ports (DVI/HDMI legacy) on GPU PCBs exposed to frequent connector mating cycles. IC Role / Device Role / Timing Role: Front-line transient suppressor mounted directly at DVI or VGA port connector footprint. Use Value: SOT-23-6 size allows placement within 2 mm of connector pads; low inductance layout minimizes VCL overshoot during 15 kV air discharge. | Use Scenario: Protecting input video interface circuitry on LCD/LED monitors from user-handling ESD and power-cable surges. IC Role / Device Role / Timing Role: Bidirectional TVS array guarding all external signal pins entering the display controller board. Use Value: 3 A (8/20 µs) lightning rating handles induced surges from AC adapter coupling; RoHS/green compliance supports global market access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J5.0A | Single-channel, 5.0 V standoff, 600 W peak power, DO-214AC package | Requires four discrete devices for equivalent channel count; higher capacitance (~40 pF) limits high-speed use | Use only where board area is unconstrained and data rates ≤ 12 Mbps |
| TPD4E001DRYR | Quad-channel, 5.5 V VRWM, 0.8 pF Cj, SOT-23-6, ±12 kV contact ESD | Lower ESD rating (±12 kV vs. ±24 kV); identical footprint but reduced surge margin | Select when cost sensitivity outweighs need for highest IEC 61000-4-2 Level 4 margin |
Compared with SMA6J5.0A and TPD4E001DRYR, the AOZ8914CI delivers superior high-speed line protection through its combination of quad-channel integration, ±24 kV contact ESD rating, and sub-1.5 pF capacitance - enabling direct deployment on USB 2.0 and DVI without signal integrity compromise.
Availability
AOZ8914CI is available at Aetrix Electronics and suitable for USB 2.0 port hardening, DVI interface protection, and monitor/video card I/O shielding requiring stable component supply across industrial, computing, and consumer electronics programs.
Supply support for AOZ8914CI 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 AOZ8914CI belongs to AOS's ultra-low-capacitance TVS array product line, engineered specifically for ESD and surge protection of high-speed digital interfaces including USB, DVI, HDMI, and IEEE 1394.
FAQ
What is the maximum clamping voltage of the AOZ8914CI at 1 A transient current?
The AOZ8914CI exhibits a maximum channel clamp voltage (VCL) of 12.5 V under 1 A (100 ns pulse) positive transients applied to any I/O pin relative to ground. This value is measured per datasheet conditions and ensures safe operation for 5 V logic receivers. The AOZ8914CI maintains this clamping performance across its full operating temperature range of –40°C to +85°C ambient.
Does the AOZ8914CI require an external bias supply to function?
No, the AOZ8914CI uses an internal steering architecture that routes transients to either the VN pin (pin 2) or ground (pin 5) without needing an external bias voltage. When used in standard 5 V systems, VN is connected to the +5 V rail, enabling bidirectional clamping for both positive and negative transients. The AOZ8914CI functions correctly with only these two connections and the four protected I/O lines.
How many data lines does the AOZ8914CI protect, and which pins correspond to them?
The AOZ8914CI protects four independent I/O lines, mapped to pins 1 (CH1), 3 (CH2), 4 (CH4), and 6 (CH3) in the SOT-23-6 package. Pin 5 is marked NC (no connect) and must remain unconnected. This arrangement allows simultaneous protection of two differential pairs - such as USB D+/D− and VBUS/GND - making the AOZ8914CI ideal for compact, high-density interface designs.
Is the AOZ8914CI compliant with RoHS and halogen-free standards?
Yes, the AOZ8914CI is RoHS compliant and classified as an AOS Green Product, meaning it contains reduced halogen content and is Pb-free. Its SOT-23-6 package meets JEDEC standards for lead-free reflow soldering, and the device is rated for operation from –40°C to +85°C ambient temperature. These environmental attributes are confirmed in the official AOZ8914CI datasheet Rev. 1.1.
Can the AOZ8914CI be used for HDMI interface protection?
The AOZ8914CI is not recommended for native HDMI 1.4+ protection due to its 5.5 V VRWM and lack of specified 3.3 V operation, though it may serve in legacy HDMI source-side applications with 5 V-tolerant PHYs. For modern HDMI, dedicated 3.3 V TVS arrays with lower VRWM and tighter capacitance matching are preferred. The AOZ8914CI is explicitly validated for USB 2.0, DVI, and IEEE 1394 per its datasheet application notes.
AOZ8914CI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- SOT-23-6
- 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:
- 22V (Typ)
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 45W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.7pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AOZ8914CI FAQ
1.How can I place an order for AOZ8914CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8914CI 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 AOZ8914CI reliable?
The price and inventory of AOZ8914CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8914CI is usually 5 days.
3.What payment methods are accepted for AOZ8914CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8914CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8914CI?
AOZ8914CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8914CI 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 AOZ8914CI?
For technical support, including AOZ8914CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8914CI requirements.
6.How does Aetrix verify that AOZ8914CI is sourced from the original manufacturer or authorized distributors?
All AOZ8914CI 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 AOZ8914CI meets industry standards.
7.What is the process for return or replacement of AOZ8914CI?
All AOZ8914CI units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8914CI, 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 AOZ8914CI part is unused and in its original packaging.
Return procedure for AOZ8914CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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