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Alpha & Omega Semiconductor Inc. AOZ8231BDI-08
- Part No.:
- AOZ8231BDI-08
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
AOZ8231BDI-08.pdf
- Description:
- TVS DIODE 8VWM 22.5VC 2DFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,741
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Product details
Overview
AOZ8231BDI-08 from Alpha & Omega Semiconductor is a one-line bi-directional TVS diode designed for ESD and transient protection of voltage-sensitive signal lines, featuring 8 V working peak reverse voltage (VRWM), ±18 kV IEC 61000-4-2 contact/air ESD rating, 15 V clamping voltage at 1 A IPP, 45 pF typical capacitance at 0 V, and operation across –40°C to +85°C ambient temperature.
For engineers reviewing the AOZ8231BDI-08 datasheet, pinout, applications, or equivalent options, key selection criteria include low clamping voltage under transient stress, ultra-small DFN 1.0 × 0.6 mm footprint for space-constrained high-speed data lines, and verified compliance with IEC 61000-4-2 Level 4, IEC 61000-4-4, and IEC 61000-4-5 standards.
Technical Context
The AOZ8231BDI-08 implements a single bi-directional silicon avalanche TVS structure optimized for fast response to sub-nanosecond ESD events. Its design targets low dynamic impedance and minimal capacitive loading on protected lines, with clamping performance validated at 1–12 A peak pulse current (8/20 µs) and stable breakdown voltage ≥9.5 V at 1 mA.
It operates as a passive shunt protector without bias or control circuitry, requiring no external components. The device's junction temperature range (–40°C to +125°C) and storage rating (–65°C to +150°C) support deployment in portable consumer electronics subject to thermal cycling and reflow soldering per J-STD-020 MSL 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 8 V - Maximum continuous reverse operating voltage before conduction begins; defines safe signal swing margin for 5 V or 3.3 V data lines. |
| VBR (min) | 9.5 V @ 1 mA - Guaranteed breakdown onset; ensures reliable triggering above normal operating voltage. |
| VCL (max) | 15.0 V @ IPP = 1 A - Peak clamped voltage during ESD event; limits stress on downstream IC inputs. |
| CJ (typ) | 45 pF @ VR = 0 V, f = 1 MHz - Low signal-line capacitance preserves integrity of USB 2.0, HDMI, or audio interfaces. |
| ESD Rating | ±18 kV contact / ±18 kV air per IEC 61000-4-2 - Meets highest industrial ESD immunity requirement without external filtering. |
| Package | DFN 1.0 × 0.6 × 0.5 mm - Enables placement directly at connector or button entry points with minimal PCB real estate. |
Pinout & Package
AOZ8231BDI-08 uses a 2-terminal DFN 1.0 × 0.6 mm package with exposed pad (no thermal slug). Pin #1 and Pin #2 are symmetrical bidirectional terminals; polarity is non-applicable due to bi-directional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Connects to protected signal line; conducts equally in both directions during overvoltage transients. |
| Terminal 2 | Anode/Cathode (bidirectional) | Connects to system ground or reference plane; completes low-impedance shunt path for ESD current. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD robustness | ±18 kV contact/air - Eliminates need for secondary ESD protection layers in handheld product designs. |
| Clamping voltage at 1 A | 15.0 V max - Keeps protected IC I/O within absolute maximum ratings during 8/20 µs surges. |
| Capacitance profile | 45 pF typ. @ 0 V, <10 pF @ 5 V - Minimizes signal distortion on high-speed lines like USB D+/D–. |
| RoHS & Green compliance | Pb-free, halogen-reduced DFN package - Supports global environmental compliance without derating or qualification overhead. |
Applications
| USB Port Protection | Smartphone Keypad ESD Guard |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D– lines against user-handling ESD in compact mobile accessories. IC Role / Device Role / Timing Role: Bi-directional shunt TVS placed immediately adjacent to USB connector to clamp transients before reaching PHY IC. Use Value: 45 pF capacitance avoids signal rise-time degradation; ±18 kV rating exceeds IEC 61000-4-2 Level 4 required for CE marking. | Use Scenario: Shielding mechanical keypad traces from ESD pulses generated by finger contact on plastic overlays. IC Role / Device Role / Timing Role: Single-line TVS mounted inline between each key switch and microcontroller GPIO input. Use Value: 1.0 × 0.6 mm footprint allows placement per-key without routing congestion; 8 V VRWM matches typical MCU input thresholds. |
| Digital Camera Interface Protection | Portable GPS Antenna Line Guard |
Use Scenario: Safeguarding MIPI CSI-2 differential pairs in ultra-thin digital cameras against assembly-line ESD. IC Role / Device Role / Timing Role: One AOZ8231BDI-08 per signal line (clock/data) referenced to common ground plane. Use Value: Low 15 V clamping prevents latch-up in image sensor interface ICs; DFN package fits tight flex-cable routing zones. | Use Scenario: Suppressing ESD induced on GPS active antenna feed lines in vehicle-mounted navigation units. IC Role / Device Role / Timing Role: Series-connected TVS on RF path between antenna connector and LNA input, grounded via shortest trace. Use Value: 9.5 V minimum breakdown ensures no conduction during 3.3 V bias; 4 A IEC 61000-4-5 surge rating handles automotive load-dump coupling. |
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); 100 W peak power; higher 100 pF capacitance; unidirectional configuration. | Requires board area >4× larger; unsuitable for high-speed data lines due to capacitance; needs series resistor for bi-directional use. | Select only when board space permits and signal bandwidth <10 MHz. |
| TPD2E001DRYR | 2-channel DFN 1.4 × 1.0 mm; 5.5 V VRWM; 12 pF capacitance; integrated ESD protection for dual-line interfaces. | Designed for differential pairs (e.g., USB, HDMI); lower VRWM limits use to 3.3 V systems; not rated for IEC 61000-4-5 lightning surges. | Prefer for dual-line protection where VRWM ≤5.5 V and surge immunity beyond ESD is not required. |
Compared with SMAJ8.0A and TPD2E001DRYR, the AOZ8231BDI-08 uniquely balances ultra-compact size, bi-directional capability, ±18 kV ESD rating, and IEC 61000-4-5 surge tolerance-making it optimal for single-line, space-critical, high-immunity consumer electronics protection.
Availability
AOZ8231BDI-08 is available at Aetrix Electronics and suitable for portable handheld devices, notebook computers, and digital camera designs requiring stable component supply, consistent RoHS/Green compliance, and guaranteed MSL 1 handling.
Supply support for AOZ8231BDI-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 & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in MOSFETs, TVS diodes, and power ICs for efficiency-critical applications.
The AOZ8231B family was developed specifically for ESD and transient protection of high-speed, space-constrained signal paths in portable consumer electronics, emphasizing low capacitance, small footprint, and certified immunity compliance.
FAQ
What is the maximum clamping voltage of AOZ8231BDI-08 under ESD stress?
The AOZ8231BDI-08 has a maximum clamping voltage of 15.0 V at 1 A peak pulse current (8/20 µs waveform), rising to 22.5 V at 5 A and 25.5 V at 12 A. This ensures protected ICs remain within safe voltage margins during standardized IEC 61000-4-2 and IEC 61000-4-5 transients. The AOZ8231BDI-08 maintains this performance across its full operating temperature range.
Does AOZ8231BDI-08 require a specific PCB layout for optimal ESD performance?
Yes - to achieve specified ±18 kV ESD immunity, AOZ8231BDI-08 must be placed within 2 mm of the protected connector or entry point, with a low-inductance ground path (<3 mm trace length) to a solid ground plane. Thermal relief on ground pads should be avoided. The AOZ8231BDI-08 datasheet provides recommended land patterns matching its DFN 1.0 × 0.6 mm footprint.
Is AOZ8231BDI-08 compatible with lead-free reflow soldering processes?
Yes - AOZ8231BDI-08 is qualified for standard Pb-free reflow per J-STD-020, with MSL 1 rating (unlimited floor life at ≤30°C/60% RH). Its DFN package withstands peak temperatures up to 260°C for 30 seconds. The AOZ8231BDI-08 reliability report confirms zero failures after preconditioning and 3-cycle reflow testing.
What is the leakage current specification for AOZ8231BDI-08 at rated VRWM?
At VRWM = 8 V and TA = 25°C, the AOZ8231BDI-08 exhibits a maximum reverse leakage current (IR) of 0.1 µA. This ultra-low leakage prevents signal attenuation or battery drain in always-on portable circuits. The AOZ8231BDI-08 maintains IR <1 µA even at 85°C ambient, supporting long-term reliability in thermally stressed environments.
Can AOZ8231BDI-08 protect analog audio lines without degrading signal quality?
Yes - with 45 pF typical capacitance at 0 V bias and <10 pF at 5 V, the AOZ8231BDI-08 introduces negligible loading on analog audio paths (e.g., headset MIC or LINE_IN). Its low clamping voltage (15 V max) prevents clipping of peak audio signals, and its bi-directional symmetry avoids DC offset. The AOZ8231BDI-08 is widely deployed in smartphone audio subsystems meeting IEC 61000-4-2 Level 4.
AOZ8231BDI-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):
- 12A
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 45pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1x0.6)
AOZ8231BDI-08 FAQ
1.How can I place an order for AOZ8231BDI-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for AOZ8231BDI-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 AOZ8231BDI-08 reliable?
The price and inventory of AOZ8231BDI-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AOZ8231BDI-08 is usually 5 days.
3.What payment methods are accepted for AOZ8231BDI-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AOZ8231BDI-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AOZ8231BDI-08?
AOZ8231BDI-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AOZ8231BDI-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 AOZ8231BDI-08?
For technical support, including AOZ8231BDI-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AOZ8231BDI-08 requirements.
6.How does Aetrix verify that AOZ8231BDI-08 is sourced from the original manufacturer or authorized distributors?
All AOZ8231BDI-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 AOZ8231BDI-08 meets industry standards.
7.What is the process for return or replacement of AOZ8231BDI-08?
All AOZ8231BDI-08 units undergo pre-shipment inspection (PSI). If there is an issue with AOZ8231BDI-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 AOZ8231BDI-08 part is unused and in its original packaging.
Return procedure for AOZ8231BDI-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AOZ8231BDI-08 Tags
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