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Alpha & Omega Semiconductor Inc. AOZ8231ADI-02
- Part No.:
- AOZ8231ADI-02
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
AOZ8231ADI-02.pdf
- Description:
- TVS DIODE 2.5VWM 12.5VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,531
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Product details
Overview
AOZ8231ADI-02 from Alpha and Omega Semiconductor is a one-line bi-directional TVS diode in a DFN 1.0 mm × 0.6 mm package, rated for ±30 kV ESD (contact/air), 2.5 V working peak reverse voltage, and 6 A peak pulse current (8/20 µs). It protects high-speed data lines in portable electronics against transients and electrostatic discharge.
For engineers reviewing the AOZ8231ADI-02 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage ≤12.5 V at 12 A, low capacitance (4.4–7.0 pF), bidirectional protection, and RoHS-compliant halogen-free packaging for space-constrained PCB layouts.
Technical Context
The AOZ8231ADI-02 implements a silicon avalanche diode structure optimized for fast response to ESD events (IEC 61000-4-2 Level 4+), with guaranteed clamping performance up to 12 A peak pulse current. Its bidirectional configuration enables symmetric transient suppression on single-ended signal lines without polarity constraints.
Designed for operation from –40 °C to +85 °C ambient, it maintains stable reverse leakage (<0.1 µA at VRWM) and low insertion loss due to sub-7 pF capacitance at 0 V bias. The device meets IEC 61000-4-4 (EFT) and IEC 61000-4-5 (lightning surge) requirements with 40 A EFT immunity and 6 A 8/20 µs surge rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 2.5 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min @ 1 mA) | 3.0 V - Breakdown voltage threshold ensuring reliable turn-on during transients |
| VCL (max @ 12 A) | 12.5 V - Clamped voltage limiting stress on protected IC I/O pins under worst-case surge |
| CJ (typ @ 0 V, 1 MHz) | 5.5 pF - Low signal-line capacitance preserving integrity of USB 2.0, I²C, and touch interfaces |
| IPP (8/20 µs) | 6 A - Peak surge current handling capacity compliant with IEC 61000-4-5 Class 3 |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact / ±30 kV air - Exceeds Level 4 immunity for handheld device front-end protection |
| Package | DFN 1.0 mm × 0.6 mm × 0.5 mm - Enables placement adjacent to connectors or buttons in ultra-thin devices |
Pinout & Package
AOZ8231ADI-02 uses a 2-terminal DFN 1.0 mm × 0.6 mm package with no exposed pad. Both terminals are symmetrical and function as bidirectional anode/cathode pair for transient clamping across a single line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Connects to protected signal line; conducts in either direction when transient exceeds VBR |
| Terminal 2 | Anode/Cathode (bidirectional) | Connects to system ground or reference plane; completes clamping path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional ESD protection | Enables single-device protection of unidirectional signal lines without polarity awareness or layout orientation constraints |
| Ultra-low capacitance (4.4–7.0 pF) | Minimizes signal distortion and timing skew on high-speed interfaces such as USB 2.0 and MIPI D-PHY |
| Low clamping voltage (≤12.5 V @ 12 A) | Reduces risk of latch-up or gate oxide damage in downstream 3.3 V or 2.5 V logic ICs |
| RoHS-compliant, halogen-free | Meets environmental compliance requirements for consumer electronics sold in EU, China, and Japan markets |
| Small footprint (0.6 mm²) | Allows placement directly at board edge or connector entry point, minimizing unprotected trace length |
Applications
| Smartphone Touchscreen Interface | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting capacitive touchscreen controller I/O pins from user-hand ESD during direct finger contact. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between touchscreen flex cable and host MCU GPIO, absorbing ±30 kV discharges before they reach sensitive analog front-end circuitry. Use Value: Prevents false touches, reset events, or permanent I/O damage while maintaining <7 pF loading on 100 kHz–1 MHz sensing signals. | Use Scenario: Shielding USB 2.0 D+ and D− lines from ESD events introduced via mating/unmating of cables or chassis contact. IC Role / Device Role / Timing Role: One AOZ8231ADI-02 per line (D+, D−) placed immediately after USB connector, providing symmetric clamping referenced to system ground. Use Value: Ensures USB enumeration reliability and signal integrity by limiting clamped voltage to ≤12.5 V at 12 A while adding <7 pF parasitic capacitance. |
| Industrial Keypad Button Lines | Portable GPS RF Front-End Bias Line |
Use Scenario: Guarding mechanical keypad scan lines in ruggedized handheld terminals exposed to repeated static discharge in dry environments. IC Role / Device Role / Timing Role: Placed in series with each button trace, clamping transients before they propagate to microcontroller input pins. Use Value: Eliminates firmware-level debounce failures and hardware resets caused by >15 kV ESD, with no impact on DC scan voltage levels. | Use Scenario: Protecting low-current LNA bias supply line in compact GPS modules where PCB space limits use of larger TVS devices. IC Role / Device Role / Timing Role: Connected between GPS antenna module's 2.5 V bias rail and ground, suppressing coupled transients from nearby switching regulators or antenna coupling. Use Value: Maintains stable LNA bias voltage during ESD events, preventing GPS signal dropouts or acquisition failure without degrading RF noise figure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ2.5A | DO-214AC package (4.5 mm × 2.7 mm); higher clamping voltage (29.2 V @ 12.5 A); 200 W peak power rating | Used in industrial power rails; unsuitable for high-speed data lines due to ~200 pF capacitance | Select SMAJ2.5A only for non-signal applications requiring higher surge energy handling and board space availability. |
| TPD2E001DRYR | 2-channel unidirectional TVS in DRY (1.6 mm × 1.6 mm); 1.5 pF typical capacitance; 5 V VRWM; ±8 kV IEC 61000-4-2 rating | Targets dual-line interfaces like HDMI or DisplayPort; lower ESD rating and fixed unidirectional polarity | Choose TPD2E001DRYR when protecting two adjacent lines with tighter capacitance budget but lower ESD threat level than AOZ8231ADI-02 supports. |
Compared with SMAJ2.5A and TPD2E001DRYR, the AOZ8231ADI-02 uniquely balances ultra-small size, ±30 kV ESD robustness, and sub-7 pF capacitance-making it optimal for single-line, high-reliability, space-constrained portable data interfaces where both performance and footprint are critical.
Availability
AOZ8231ADI-02 is available at Aetrix Electronics and suitable for smartphone touchscreen interfaces, USB 2.0 data line protection, and industrial keypad button lines requiring stable component supply across high-mix, low-volume production runs.
Supply support for AOZ8231ADI-02 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 high-ESD-resilience transient protection in minimal PCB area for portable consumer electronics, targeting design-in at major mobile ODMs and wearable device manufacturers.
FAQ
What is the maximum clamping voltage of AOZ8231ADI-02 under a 12 A 8/20 µs surge?
The AOZ8231ADI-02 has a maximum clamping voltage of 12.5 V when subjected to a 12 A peak pulse current with 8/20 µs waveform. This value is specified in the Electrical Characteristics table on page 3 of the Rev. 6.0 datasheet and ensures safe operation for 2.5 V and 3.3 V logic interfaces. The clamping behavior remains consistent across its full operating temperature range of –40 °C to +85 °C ambient.
Does AOZ8231ADI-02 support bidirectional ESD protection on a single line?
Yes, AOZ8231ADI-02 is explicitly designed as a one-line bi-directional TVS diode. Its symmetrical internal structure allows it to suppress positive and negative transients equally-enabling protection of any single-ended signal line without regard to polarity. This is confirmed in the General Description section and validated by identical ±30 kV ESD ratings for both contact and air discharge modes.
What is the capacitance range of AOZ8231ADI-02 at 0 V bias and 1 MHz?
The AOZ8231ADI-02 exhibits a capacitance range of 4.4 pF (minimum), 5.5 pF (typical), and 7.0 pF (maximum) at 0 V reverse bias and 1 MHz test frequency. This low, tightly controlled capacitance is critical for preserving signal integrity on high-speed interfaces such as USB 2.0 and I²C, and is measured per standard JESD22-A114 methodology.
Is AOZ8231ADI-02 compliant with RoHS and halogen-free standards?
Yes, AOZ8231ADI-02 is a certified AOS Green Product: fully RoHS compliant and halogen-free per AOS Green Policy (document ID AOSGreenPolicy.pdf). The DFN 1.0 mm × 0.6 mm package contains no lead, brominated flame retardants, or chlorine-based compounds, meeting regulatory requirements for sale in the EU, China, and Japan.
What is the working peak reverse voltage (VRWM) rating for AOZ8231ADI-02?
The AOZ8231ADI-02 has a working peak reverse voltage (VRWM) rating of 2.5 V. This means it remains in high-impedance blocking mode for all steady-state voltages up to 2.5 V, making it suitable for protecting 1.8 V, 2.5 V, and 3.3 V signal lines where DC bias must be preserved without leakage or conduction. The parameter is guaranteed across the full –40 °C to +85 °C ambient temperature range.
AOZ8231ADI-02 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):
- 2.5V (Max)
- Voltage - Breakdown (Min):
- 3V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 6A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5.5pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1x0.6)
AOZ8231ADI-02 FAQ
1.How can I place an order for AOZ8231ADI-02 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8231ADI-02 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-02 reliable?
The price and inventory of AOZ8231ADI-02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8231ADI-02 is usually 5 days.
3.What payment methods are accepted for AOZ8231ADI-02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8231ADI-02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8231ADI-02?
AOZ8231ADI-02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8231ADI-02 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-02?
For technical support, including AOZ8231ADI-02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8231ADI-02 requirements.
6.How does Aetrix verify that AOZ8231ADI-02 is sourced from the original manufacturer or authorized distributors?
All AOZ8231ADI-02 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-02 meets industry standards.
7.What is the process for return or replacement of AOZ8231ADI-02?
All AOZ8231ADI-02 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8231ADI-02, 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-02 part is unused and in its original packaging.
Return procedure for AOZ8231ADI-02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8231ADI-02 Tags
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