Alpha & Omega Semiconductor Inc. AOZ8829DI-05

Overview

AOZ8829DI-05 from Alpha and Omega Semiconductor is a 4-channel ultra-low capacitance transient voltage suppressor (TVS) array designed to protect high-speed differential data lines including HDMI 1.4/2.0, USB 3.1, MDDI, SATA, and Gigabit Ethernet. It features 0.25 pF line-to-line capacitance, ±30 kV HBM ESD rating, 5 V working peak reverse voltage, clamping voltage of 6.5 V at +12 A TLP, and operates from –40 °C to +85 °C ambient.

For engineers reviewing the AOZ8829DI-05 datasheet, pinout, applications, or equivalent options, key selection criteria include I/O line count (4), ultra-low inter-pin capacitance (0.25 pF), IEC 61000-4-2 Level 4 compliance, DFN-10 package footprint compatibility, and clamping performance under 12 A TLP pulses.

Technical Context

The AOZ8829DI-05 integrates eight surge-rated steering diodes and one internal TVS in a single DFN-10 package to provide bidirectional clamping for four independent I/O channels. During ESD transients, steering diodes forward-bias to divert current to V_N (pins 3 and 8) or ground, limiting voltage overshoot via low dynamic resistance (0.35 Ω positive / 0.15 Ω negative).

Its flow-through pinout enables direct in-line placement on HDMI or USB 3.1 differential pairs without trace routing detours-pins 1,2,4,5 connect to protected I/O lines while pins 6,7,9,10 are NCs for mechanical stability. The device maintains signal integrity up to 6 GHz with <0.25 pF inter-line capacitance and low insertion loss.

Key Specifications

Pinout & Package

AOZ8829DI-05 uses a RoHS-compliant, halogen-free 2.5 mm × 1.0 mm × 0.55 mm DFN-10 package with exposed thermal pad (not electrically connected). Pin 1 is marked by dot; top view orientation follows standard DFN convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RClamp0524P and ESD7L5.0DT5G, the AOZ8829DI-05 delivers superior high-speed signal fidelity (0.25 pF vs. ≥0.3 pF), higher ESD robustness (±30 kV vs. ±20 kV), and optimized PCB integration via native 4-channel flow-through pinout-reducing layout complexity and improving surge immunity consistency across all protected lanes.

Availability

AOZ8829DI-05 is available at Aetrix Electronics and suitable for HDMI 2.0 port protection, USB 3.1 Gen 2 interface hardening, and MDDI mobile display interface designs requiring stable component supply and long-term lifecycle assurance.

Supply support for AOZ8829DI-05 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, IGBTs, and protection devices, with global manufacturing and test operations.

The AOZ8829DI-05 belongs to AOS's ultra-low-capacitance TVS array product line, engineered specifically for ESD and surge protection of multi-gigabit serial interfaces where signal integrity and PCB layout simplicity are critical.

FAQ

What is the maximum clamping voltage of AOZ8829DI-05 under IEC 61000-4-5 surge conditions?

The AOZ8829DI-05 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. This performance is measured pin-to-ground and reflects the device's ability to limit transient overvoltage during lightning-induced surges on external data lines. The asymmetry arises from internal diode construction and is documented in the Electrical Characteristics table on page 3 of the Rev. 2.0 datasheet.

Can AOZ8829DI-05 be used to protect Thunderbolt 2.0 interfaces?

Yes, AOZ8829DI-05 is validated for Thunderbolt 2.0 (10 Gbps) applications, as confirmed by eye diagram testing in the datasheet (page 4). Its 0.25 pF line-to-line capacitance, low insertion loss up to 6 GHz, and flow-through pinout preserve signal integrity without measurable degradation. Designers should tie V_N (pins 3 and 8) to a clean 5 V reference and maintain short, controlled-impedance traces to achieve optimal performance with AOZ8829DI-05.

What is the purpose of the NC pins (6, 7, 9, 10) on AOZ8829DI-05?

The NC pins (6, 7, 9, 10) on AOZ8829DI-05 serve exclusively as mechanical anchors to enhance solder joint reliability and package stability on the PCB. They are not electrically connected internally and must remain unconnected in the circuit. Their inclusion allows the DFN-10 package to achieve robust surface-mount adhesion without compromising the flow-through signal path formed by pins 1–5 and 3/8, as detailed in the Pin Configuration diagram on page 2.

Does AOZ8829DI-05 require an external bias supply?

No, AOZ8829DI-05 does not require an external bias supply. It operates passively using the protected I/O lines and the V_N node (pins 3 and 8), which must be connected to either the system's 5 V supply rail or chassis ground depending on the protection scheme. The device draws zero quiescent current and relies solely on transient energy to activate its internal steering diodes and TVS element-no active circuitry or control signals are involved in AOZ8829DI-05 operation.

How does AOZ8829DI-05 differ from standard single-diode TVS components in high-speed designs?

Unlike discrete TVS diodes, AOZ8829DI-05 integrates four matched channels with ultra-low inter-pin capacitance (0.25 pF), flow-through routing, and shared V_N reference-enabling simultaneous protection of differential pairs without trace stubs or impedance mismatches. Standard single-diode solutions require separate placement per line, increasing parasitic inductance and degrading signal integrity above 3 GHz. AOZ8829DI-05's architecture eliminates these issues while maintaining full IEC 61000-4-2 and IEC 61000-4-5 compliance.