Alpha & Omega Semiconductor Inc. AOZ8829DI-03

Overview

AOZ8829DI-03 from Alpha and Omega Semiconductor is an ultra-low capacitance transient voltage suppressor (TVS) array designed to protect four high-speed differential I/O lines-such as HDMI 1.4/2.0, USB 3.1, MDDI, and SATA-from ESD and lightning surges. It features 0.25 pF line-to-line capacitance, 3.3 V working peak reverse voltage, ±30 kV HBM ESD rating, and clamping voltages of 3 V / –2.5 V at ±2 A TLP, enabling signal integrity up to 6 GHz in digital video and computing interfaces.

For engineers reviewing the AOZ8829DI-03 datasheet, pinout, applications, or equivalent options, key selection criteria include line-to-line capacitance ≤0.25 pF, clamping voltage ≤6.5 V at ±12 A IEC 61000-4-5, RoHS-compliant DFN-10 package (2.5 mm × 1.0 mm), and support for HDMI/USB 3.1 flow-through PCB layout without trace routing detours.

Technical Context

The AOZ8829DI-03 integrates eight surge-rated steering diodes and one internal TVS in a single DFN-10 package to provide bidirectional clamping for four I/O pairs. Its low dynamic resistance (0.35 Ω / 0.15 Ω for ±1–16 A TLP) and sub-1 Ω total path impedance ensure fast transient response with minimal overshoot during ESD events.

It operates within –40 °C to +85 °C ambient temperature, supports 3.3 V nominal supply rails, and delivers <0.1 µA reverse leakage at VRWM = 3.3 V. The device uses a flow-through pinout (pins 1/2/4/5 active, pins 6/7/9/10 NC) to minimize parasitic inductance and enable direct placement on HDMI/USB differential traces without signal detours.

Key Specifications

Pinout & Package

The AOZ8829DI-03 is housed in a RoHS-compliant, halogen-free 2.5 mm × 1.0 mm × 0.55 mm DFN-10 package with exposed thermal pad (not electrically connected). Its flow-through pinout minimizes trace inductance and allows direct routing of HDMI/USB differential pairs beneath the device.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TVS array applications.

Compared with SMA6J33A-Q and TPD4E05U06DQAR, the AOZ8829DI-03 uniquely combines 0.25 pF line-to-line capacitance, flow-through DFN-10 pinout, and ±30 kV ESD rating - making it the only option validated for 10 Gbps HDMI 2.0 and USB 3.1 Gen 2 differential protection without signal integrity compromise.

Availability

AOZ8829DI-03 is available at Aetrix Electronics and suitable for HDMI 1.4/2.0 transceivers, USB 3.1 Gen 2 ports, and MDDI mobile display interfaces requiring stable component supply across consumer electronics, industrial computing, and broadcast equipment programs.

Supply support for AOZ8829DI-03 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, high-reliability applications.

The AOZ8829DI-03 belongs to AOS's ultra-low-capacitance TVS array product line, engineered specifically for ESD and surge protection of multi-gigabit serial interfaces without degrading signal fidelity.

FAQ

What is the maximum clamping voltage of the AOZ8829DI-03 under IEC 61000-4-5 lightning surge conditions?

The AOZ8829DI-03 exhibits a clamping voltage of +7.5 V at +6 A and –8.5 V at –8 A under IEC 61000-4-5 (8/20 µs) surge conditions. These values are measured pin-to-ground and reflect worst-case transient suppression performance for HDMI and USB data lines. The AOZ8829DI-03 maintains this clamping behavior across its full operating temperature range (–40 °C to +85 °C ambient).

Can the AOZ8829DI-03 be used to protect PCIe Gen 3 differential lanes?

The AOZ8829DI-03 is not recommended for PCIe Gen 3 (8 GT/s) protection because its 0.25 pF line-to-line capacitance-while excellent for HDMI 2.0 and USB 3.1-is still above the typical ≤0.15 pF requirement for PCIe Gen 3 AC-coupled differential signaling. The AOZ8829DI-03's clamping voltage and flow-through layout also do not match PCIe reference designs. Use dedicated PCIe TVS arrays such as the SP3222 or similar instead.

How does the AOZ8829DI-03 achieve ultra-low capacitance while maintaining high ESD robustness?

The AOZ8829DI-03 achieves 0.25 pF line-to-line capacitance through optimized junction geometry and minimized metal interconnect area in its DFN-10 die layout, while sustaining ±30 kV HBM ESD rating via high-doping concentration in the steering diode epitaxial layers. This balance is confirmed by TLP characterization showing <0.35 Ω dynamic resistance and stable breakdown at 6 V. The AOZ8829DI-03's design avoids trade-offs between speed and ruggedness.

Is the AOZ8829DI-03 compatible with lead-free reflow soldering profiles?

Yes, the AOZ8829DI-03 is qualified for standard lead-free reflow soldering per JEDEC J-STD-020, supporting peak temperatures up to 260 °C for 30 seconds. Its DFN-10 package uses matte tin plating and meets RoHS and halogen-free requirements. The AOZ8829DI-03's thermal performance remains stable after three reflow cycles, with no degradation in clamping voltage or leakage current.

What is the role of pins 6, 7, 9, and 10 on the AOZ8829DI-03?

Pins 6, 7, 9, and 10 on the AOZ8829DI-03 are no-connect (NC) terminals. They serve solely for mechanical reinforcement of the DFN-10 package during PCB assembly and do not perform any electrical function. These pins may be left floating or optionally grounded for improved thermal dissipation-but grounding them does not affect the AOZ8829DI-03's clamping behavior or ESD performance.