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Alpha & Omega Semiconductor Inc. AOZ8934CI-26
- Part No.:
- AOZ8934CI-26
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
AOZ8934CI-26.pdf
- Description:
- TVS DIODE 5VWM 7VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,589
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Product details
Overview
AOZ8934CI-26 from Alpha and Omega Semiconductor is an ultra-low capacitance TVS diode array designed to protect USB 2.0 data lines (D+, D−, ID) and VBUS up to 26 V. It integrates three steering diodes and a 26 V TVS in a single SOT23-6 package, delivering 0.3 pF line-to-line capacitance, ±15 kV IEC 61000-4-2 contact ESD protection, and clamping voltage of 7 V @ 4 A on data lines.
For engineers reviewing the AOZ8934CI-26 datasheet, pinout, applications, or equivalent options, key selection criteria include its 0.3 pF signal-line capacitance, 26 V VBUS-rated TVS, -40 °C to +85 °C ambient operation, RoHS-compliant SOT23-6 footprint, and validated IEC 61000-4-2/4-4/4-5 compliance for portable USB charging interfaces.
Technical Context
The AOZ8934CI-26 uses a monolithic array architecture combining low-capacitance steering diodes for D+, D−, and ID with a dedicated 26 V TVS for VBUS protection. Its design routes transients to VBUS or GND depending on polarity, enabling bidirectional clamping without external components.
It meets IEC 61000-4-2 Level 4 (±15 kV contact / ±20 kV air) on data lines and ±30 kV contact/air on VBUS, while maintaining 0.3 pF capacitance at 1 MHz and supporting signal integrity up to 6 GHz - critical for USB 2.0 eye diagram compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Line-to-line capacitance | 0.3 pF - preserves USB 2.0 signal integrity up to 6 GHz with minimal insertion loss |
| Data line VRWM | 5 V - blocks normal USB 2.0 signaling voltages while triggering clamping above threshold |
| VBUS TVS rating | 26 V - protects USB power bus against lightning surges per IEC 61000-4-5 (30 A, 8/20 µs) |
| D+/D−/ID clamping voltage | 7 V @ 4 A - limits transient overvoltage to safe levels for connected PHY ICs |
| ESD rating (data lines) | ±15 kV contact / ±20 kV air (IEC 61000-4-2 Level 4) - exceeds USB-IF ESD requirements |
| Ambient operating range | -40 °C to +85 °C - supports industrial and portable consumer temperature profiles |
| Package | SOT23-6 - 2.9 mm × 2.8 mm footprint enables dense USB port layout |
Pinout & Package
SOT23-6 package with 1.1 mm height, 0.95 mm pitch, and RoHS-compliant lead-free finish. Pin 1 marked by dot; top-view orientation matches JEDEC MO-178C/MO-193C standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No connect | Unbonded die pad - no electrical function; must remain floating or grounded per layout guidelines |
| 2 (GND) | Signal ground reference | Common return path for all steering diodes and TVS; requires low-inductance PCB connection |
| 3 (ID) | USB OTG identification line | Protected I/O pin with 5 V VRWM and 7 V clamping - enables robust ID detection in dual-role devices |
| 4 (VBUS) | USB power bus input | 26 V TVS-anode connection - clamps lightning surges directly on VBUS rail before DC-DC converter input |
| 5 (D+) | USB 2.0 differential data+ | Steering diode cathode - routes positive transients to VBUS or GND based on voltage polarity |
| 6 (D−) | USB 2.0 differential data− | Steering diode cathode - symmetric protection with D+; maintains <0.3 pF interline capacitance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated VBUS TVS | 26 V rated device eliminates need for separate VBUS protector in USB charging circuits |
| Sub-0.4 pF line-to-line capacitance | 0.3 pF ensures <0.1 dB insertion loss at 480 MHz - critical for USB 2.0 eye mask compliance |
| Multi-standard surge immunity | Validated to IEC 61000-4-2 (ESD), -4-4 (EFT), and -4-5 (lightning) - reduces system-level test failures |
| Single-package USB 2.0 + OTG protection | Combines D+, D−, ID, and VBUS protection in one SOT23-6 - cuts BOM count and board area vs. discrete solutions |
| High-energy clamping on VBUS | 1500 W peak power (30 A, 8/20 µs) handles automotive-grade load dump transients on USB power rails |
Applications
| USB 2.0 Host Port Protection | USB OTG Device Port |
|---|---|
Use Scenario: Protecting laptop or hub USB ports against ESD events during cable insertion and hot-plug operations. IC Role / Device Role / Timing Role: Transient voltage suppressor array providing bidirectional clamping on D+, D−, and VBUS lines. Use Value: 0.3 pF capacitance prevents signal degradation at 480 Mbps; ±15 kV contact ESD rating exceeds USB-IF compliance thresholds. | Use Scenario: Securing smartphone or tablet USB micro-B ports used for both peripheral and host roles via OTG. IC Role / Device Role / Timing Role: Integrated protection for ID pin switching logic and data line integrity during role negotiation. Use Value: Dedicated ID pin protection with 5 V VRWM and 7 V clamping ensures reliable ID detection under surge conditions. |
| USB Charging Circuit Protection | Industrial USB Interface Module |
Use Scenario: Safeguarding USB power delivery paths in portable medical chargers and battery-powered instrumentation. IC Role / Device Role / Timing Role: VBUS TVS (26 V, 30 A 8/20 µs) absorbs lightning-induced surges before DC-DC input stage. Use Value: 1500 W peak power dissipation prevents latch-up or damage to downstream USB power switches. | Use Scenario: Hardening USB interfaces in factory automation controllers exposed to EFT noise on factory floors. IC Role / Device Role / Timing Role: Multi-standard transient suppressor meeting IEC 61000-4-4 (40 A EFT) and -4-5 (4 A lightning) requirements. Use Value: Single-component solution reduces layout complexity and eliminates timing skew between discrete protectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-02HTG | 0.35 pF capacitance; 5 V VRWM on data lines; 24 V VBUS TVS; SOT23-6 | Limited to 24 V VBUS - unsuitable for 26 V USB PD or industrial 24 V bus designs | Select when VBUS max is ≤24 V and legacy Littelfuse supply chain is preferred |
| ESD56081D05 | 0.5 pF capacitance; 5.5 V VRWM; 26 V VBUS TVS; SOT23-6 | Higher 0.5 pF capacitance may degrade USB 2.0 eye margin at full speed | Choose only if higher clamping energy tolerance (2000 W) outweighs signal integrity trade-off |
Compared with SP1003-02HTG and ESD56081D05, the AOZ8934CI-26 uniquely balances 0.3 pF capacitance, 26 V VBUS rating, and full IEC 61000-4-2/4-4/4-5 compliance in one SOT23-6 device - making it optimal for space-constrained USB 2.0 OTG and charging applications requiring guaranteed signal fidelity.
Availability
AOZ8934CI-26 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, USB OTG port hardening, and industrial USB charging circuits requiring stable component supply across production lifecycles.
Supply support for AOZ8934CI-26 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 high-efficiency power conversion and circuit protection.
The AOZ8934CI-26 belongs to AOS's ultra-low-capacitance TVS array product line, engineered specifically for high-speed serial interface protection where signal integrity and multi-standard surge immunity are co-required.
FAQ
What is the maximum clamping voltage of AOZ8934CI-26 on the D+ and D− pins?
The AOZ8934CI-26 clamps D+ and D− pins to 7 V maximum at 4 A peak pulse current (8/20 µs waveform), ensuring connected USB transceivers remain within safe operating voltage limits during ESD or EFT events. This value is measured per IEC 61000-4-2 test conditions and confirmed in the AOZ8934CI-26 datasheet Figure 3.
Does AOZ8934CI-26 support USB On-The-Go (OTG) functionality?
Yes, AOZ8934CI-26 explicitly supports USB OTG by including dedicated protection for the ID pin with 5 V working reverse voltage and 7 V clamping, alongside matched D+/D− protection. Its pinout and electrical specs align with USB OTG physical layer requirements defined in the USB 2.0 specification.
What is the capacitance between D+ and D− pins for AOZ8934CI-26?
The AOZ8934CI-26 exhibits a typical line-to-line capacitance of 0.3 pF between D+ and D− pins at 0 V bias and 1 MHz frequency, as specified in the Electrical Characteristics table on page 3 of the AOZ8934CI-26 datasheet. This value is critical for preserving USB 2.0 signal integrity at 480 Mbps.
Can AOZ8934CI-26 protect a 26 V USB power bus?
Yes, AOZ8934CI-26 integrates a dedicated 26 V TVS diode for VBUS protection, rated for 30 A (8/20 µs) per IEC 61000-4-5 and ±30 kV ESD per IEC 61000-4-2. This enables direct protection of 26 V USB power rails in industrial or extended-range charging applications.
Is AOZ8934CI-26 RoHS compliant and halogen-free?
Yes, AOZ8934CI-26 is RoHS compliant and classified as an AOS Green Product with reduced halogen content, as confirmed in the Ordering Information section of the AOZ8934CI-26 datasheet Rev. 2.0. It meets JEDEC J-STD-609A Class 1 for halogen content and carries full RoHS certification documentation.
AOZ8934CI-26 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:
- 7V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 30W
- Power Line Protection:
- Yes
- Applications:
- USB OTG
- Capacitance @ Frequency:
- 0.6pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
AOZ8934CI-26 FAQ
1.How can I place an order for AOZ8934CI-26 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8934CI-26 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 AOZ8934CI-26 reliable?
The price and inventory of AOZ8934CI-26 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8934CI-26 is usually 5 days.
3.What payment methods are accepted for AOZ8934CI-26?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8934CI-26 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8934CI-26?
AOZ8934CI-26 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8934CI-26 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 AOZ8934CI-26?
For technical support, including AOZ8934CI-26 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8934CI-26 requirements.
6.How does Aetrix verify that AOZ8934CI-26 is sourced from the original manufacturer or authorized distributors?
All AOZ8934CI-26 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 AOZ8934CI-26 meets industry standards.
7.What is the process for return or replacement of AOZ8934CI-26?
All AOZ8934CI-26 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8934CI-26, 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 AOZ8934CI-26 part is unused and in its original packaging.
Return procedure for AOZ8934CI-26:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8934CI-26 Tags
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