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Alpha & Omega Semiconductor Inc. AOZ8231ADI-08
- Part No.:
- AOZ8231ADI-08
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
AOZ8231ADI-08.pdf
- Description:
- TVS DIODE 8VWM 22.5VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,319
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Product details
Overview
AOZ8231ADI-08 from Alpha and Omega Semiconductor is a one-line bidirectional TVS diode in a DFN 1.0 mm × 0.6 mm package, rated for 8 V working peak reverse voltage (VRWM), 15–22.5 V clamping voltage at 5 A IPP, and ±30 kV IEC 61000-4-2 ESD protection-designed to safeguard high-speed data lines in portable electronics against transients and electrostatic discharge.
For engineers reviewing the AOZ8231ADI-08 datasheet, pinout, applications, or equivalent options, key selection considerations include its 8 V standoff voltage, 5 A lightning surge rating (IEC 61000-4-5), 19–27 pF capacitance at 0 V, low 0.1 µA leakage, and ultra-compact footprint for space-constrained USB, audio, or sensor interfaces.
Technical Context
The AOZ8231ADI-08 operates as a bidirectional transient voltage suppressor for single-signal-line protection, leveraging avalanche breakdown to clamp overvoltage events without polarity dependence. Its design targets fast response (<1 ns rise time) and low clamping voltage to preserve signal integrity on sensitive I/O paths.
It meets IEC 61000-4-2 Level 4 (±30 kV air/contact), IEC 61000-4-4 (40 A EFT), and IEC 61000-4-5 (5 A, 8/20 µs lightning surge), with thermal operation validated from –40 °C to +85 °C ambient and junction temperatures up to +125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 8.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min @ 1 mA) | 9.5 V - Breakdown voltage threshold initiating avalanche clamping |
| VCL @ IPP = 5 A | 15.0–22.5 V - Clamped voltage during 5 A surge, limiting stress on downstream ICs |
| CJ @ 0 V, 1 MHz | 19–27 pF - Low signal-line capacitance preserving high-speed interface bandwidth |
| IR @ VRWM | 0.1 µA - Negligible leakage current ensuring minimal standby power impact |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact / ±30 kV air - Robust immunity meeting highest industrial ESD test level |
| Surge Rating (IEC 61000-4-5) | 5 A, 8/20 µs - Withstands induced lightning surges in portable device ports |
Pinout & Package
AOZ8231ADI-08 is housed in an ultra-small, RoHS-compliant, halogen-free DFN 1.0 mm × 0.6 mm × 0.5 mm package with two terminals. The device has no internal biasing or control logic-its bidirectional behavior arises from symmetrical PN junction structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Transient current entry point under negative transients | One side of symmetrical TVS junction; conducts when voltage falls below –VRWM |
| Cathode (K) | Transient current entry point under positive transients | Other side of symmetrical TVS junction; conducts when voltage exceeds +VRWM |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or differential signal lines (e.g., USB D+/D−, audio jack) without polarity constraints |
| Low clamping voltage | VCL ≤ 22.5 V at 5 A ensures safe margin below typical 24 V rail or 16 V logic I/O absolute max ratings |
| Ultra-low capacitance | 19–27 pF enables use on 480 Mbps USB 2.0 or 24 MHz SPI without signal degradation |
| High ESD robustness | ±30 kV contact discharge exceeds IEC 61000-4-2 Level 4, eliminating need for secondary ESD stages |
| Space-optimized footprint | DFN 1.0 × 0.6 mm occupies <0.6 mm² PCB area-ideal for thin smartphones and wearables |
Applications
| USB 2.0 Data Lines | Smartphone Audio Jacks |
|---|---|
Use Scenario: Protecting D+ and D− lines in mobile phone USB OTG circuits from repeated plug/unplug ESD events. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed directly at connector, clamping transients before they reach USB PHY IC. Use Value: Prevents latch-up or gate oxide damage in USB transceivers while maintaining <480 Mbps signal fidelity via 19–27 pF capacitance. | Use Scenario: Shielding 3.5 mm TRRS headset jacks from user-hand ESD during insertion/removal. IC Role / Device Role / Timing Role: Single-line TVS across left/right audio channels and microphone input to suppress common-mode surges. Use Value: Eliminates audible pop/crackle and prevents analog front-end IC damage without adding series resistance or distortion. |
| Digital Camera Sensor Interfaces | Portable GPS RF Front-End |
Use Scenario: Safeguarding MIPI CSI-2 clock and data lanes between image sensor and SoC in compact action cameras. IC Role / Device Role / Timing Role: One AOZ8231ADI-08 per lane, mounted adjacent to connector to minimize trace inductance before clamping. Use Value: Maintains signal edge rate integrity (low capacitance) while surviving >30 kV ESD strikes that would otherwise corrupt frame sync or cause reset. | Use Scenario: Protecting GPS antenna feed line and GNSS baseband inputs from static discharge in handheld navigation units. IC Role / Device Role / Timing Role: Placed between antenna switch and LNA input to shunt ESD energy before low-noise amplifier stage. Use Value: Preserves RF noise figure by avoiding high-capacitance alternatives; 8 V VRWM aligns with typical GPS LNA DC bias rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A | DO-214AC package (4.5 × 2.7 mm); 8.0 V VRWM; 20 V VCL @ 5 A; 100 pF capacitance | Higher capacitance limits use to DC/low-speed lines; larger footprint unsuitable for portable PCBs | Choose SMAJ8.0A only if board space permits and signal bandwidth <1 MHz |
| TPD2E001DRYR | 2-channel unidirectional TVS in DFN 1.0 × 0.6 mm; 5.5 V VRWM; 12 V VCL @ 1 A; 12 pF per channel | Unidirectional only; requires separate anode/cathode routing; lower voltage rating suits 3.3 V I/O, not 8 V rails | Prefer TPD2E001DRYR for dual 3.3 V lines where bidirectionality isn't needed and lower capacitance is critical |
Compared with SMAJ8.0A and TPD2E001DRYR, the AOZ8231ADI-08 uniquely combines bidirectional 8 V protection, 5 A surge capability, and sub-30 pF capacitance in a 1.0 × 0.6 mm footprint-making it optimal for space-limited, medium-voltage, high-speed single-line interfaces where polarity-agnostic clamping is required.
Availability
AOZ8231ADI-08 is available at Aetrix Electronics and suitable for USB 2.0 port protection, smartphone audio jack hardening, and digital camera sensor interface safeguarding requiring stable component supply across high-volume consumer electronics production.
Supply support for AOZ8231ADI-08 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 AOZ8231ADI family was developed to deliver ultra-compact, high-reliability ESD and surge protection for portable electronics I/O interfaces-balancing low capacitance, precise voltage ratings, and industry-leading ESD immunity.
FAQ
What is the working peak reverse voltage (VRWM) of the AOZ8231ADI-08?
The AOZ8231ADI-08 has a VRWM of 8.0 V, meaning it remains non-conductive under normal operating conditions up to this reverse voltage. This rating ensures compatibility with 8 V nominal signal rails or bias networks while providing sufficient margin before clamping initiates during transients.
Does the AOZ8231ADI-08 support bidirectional transient suppression?
Yes, the AOZ8231ADI-08 is explicitly designed as a bidirectional TVS diode. Its symmetrical junction structure allows it to clamp both positive and negative transients equally-making it suitable for AC-coupled lines like USB D+/D−, audio signals, or any single-ended interface exposed to polarity-agnostic ESD events.
What is the maximum clamping voltage of the AOZ8231ADI-08 at 5 A surge current?
The AOZ8231ADI-08 specifies a maximum clamping voltage (VCL) of 22.5 V at 5 A peak pulse current (8/20 µs waveform). This value defines the upper voltage limit imposed on protected circuitry during a full-rated lightning surge event, ensuring downstream components remain within safe operating limits.
How does the capacitance of the AOZ8231ADI-08 affect high-speed signal integrity?
The AOZ8231ADI-08 exhibits 19–27 pF capacitance at 0 V bias and 1 MHz, which minimizes signal attenuation and timing skew on interfaces up to 480 Mbps (e.g., USB 2.0). This low capacitance avoids resonance issues and preserves edge rates better than alternatives exceeding 50 pF, directly supporting reliable high-speed data transmission.
Is the AOZ8231ADI-08 compliant with environmental standards?
Yes, the AOZ8231ADI-08 is RoHS-compliant and halogen-free, meeting AOS Green Product requirements. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE), and adheres to JEDEC MSL Level 1 moisture sensitivity classification.
AOZ8231ADI-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- 2-UDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 8V (Max)
- Voltage - Breakdown (Min):
- 9.5V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 23pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1x0.6)
AOZ8231ADI-08 FAQ
1.How can I place an order for AOZ8231ADI-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8231ADI-08 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 AOZ8231ADI-08 reliable?
The price and inventory of AOZ8231ADI-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8231ADI-08 is usually 5 days.
3.What payment methods are accepted for AOZ8231ADI-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8231ADI-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8231ADI-08?
AOZ8231ADI-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8231ADI-08 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 AOZ8231ADI-08?
For technical support, including AOZ8231ADI-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8231ADI-08 requirements.
6.How does Aetrix verify that AOZ8231ADI-08 is sourced from the original manufacturer or authorized distributors?
All AOZ8231ADI-08 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 AOZ8231ADI-08 meets industry standards.
7.What is the process for return or replacement of AOZ8231ADI-08?
All AOZ8231ADI-08 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8231ADI-08, 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 AOZ8231ADI-08 part is unused and in its original packaging.
Return procedure for AOZ8231ADI-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8231ADI-08 Tags
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