Alpha & Omega Semiconductor Inc. AOZ8102DI

Overview

AOZ8102DI from Alpha & Omega Semiconductor is an ultra-low capacitance TVS diode array designed to protect four high-speed data lines (e.g., USB 2.0 D+/D−, VBUS) against ESD and lightning transients. It features 1.0 pF I/O-to-GND capacitance, ±20 kV IEC 61000-4-2 contact/air discharge rating, 5.5 V working peak reverse voltage, and a DFN-6 1.6 mm × 1.6 mm RoHS-compliant package for space-constrained interfaces.

For engineers reviewing the AOZ8102DI datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 1 A (11.0 V), low leakage (<1.0 µA at 5 V), channel capacitance matching (±0.03 pF), and compatibility with 3.3 V–5 V biasing in video, Ethernet, and display signal paths.

Technical Context

The AOZ8102DI integrates eight steering diodes and one bidirectional TVS in a single DFN-6 package, enabling simultaneous protection of four I/O lines with shared VP (pin 5) and GND (exposed pad). Its architecture routes transient energy to VP or ground via low-capacitance PN junctions, with clamping validated under 100 ns TLP pulses up to 12 A.

It operates across −40°C to +85°C ambient, supports both lead-free and SnPb reflow, and maintains stable electrical performance due to tight capacitance matching (ΔCj ≤ 0.03 pF) and low forward voltage (0.70–0.85 V at 15 mA), critical for preserving signal integrity on 480 Mbps USB 2.0 links.

Key Specifications

Pinout & Package

AOZ8102DI uses a 1.6 mm × 1.6 mm DFN-6 package with exposed thermal pad (pin 6 = GND) and pin 1 identification dot. The compact footprint enables placement directly at I/O connectors to minimize PCB trace inductance and suppress ESD coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMA6J5.0A and SP1003-04UTG, the AOZ8102DI delivers optimal balance of 1.0 pF capacitance, ±20 kV ESD robustness, and quad-channel integration in a 1.6 mm × 1.6 mm DFN, making it ideal for cost-sensitive, space-constrained USB 2.0 and DVI designs.

Availability

AOZ8102DI is available at Aetrix Electronics and suitable for USB 2.0 interface protection, DVI video link hardening, and notebook I/O connector ESD mitigation requiring stable component supply and long-term lifecycle support.

Supply support for AOZ8102DI 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 AOZ8102DI belongs to AOS's ultra-low-capacitance TVS array product line, engineered specifically for ESD and surge protection of high-speed digital interfaces including USB, HDMI, DVI, and Ethernet without compromising signal integrity.

FAQ

What is the maximum clamping voltage of the AOZ8102DI at 1 A peak pulse current?

The AOZ8102DI exhibits a maximum clamping voltage of 11.0 V for positive transients and −2.50 V for negative transients at 1 A peak pulse current (t_p = 100 ns), measured between any I/O pin and ground. This ensures downstream USB 2.0 PHY ICs remain within absolute maximum ratings during ESD events. The AOZ8102DI's low clamping voltage directly contributes to system-level IEC 61000-4-2 Level 4 compliance.

Can the AOZ8102DI be used to protect 3.3 V logic interfaces?

Yes, the AOZ8102DI supports 3.3 V biasing on its VP pin (pin 5), enabling effective clamping for 3.3 V I/O systems such as mobile display interfaces and embedded controllers. Electrical characteristics-including 1.0 pF capacitance and 11.0 V clamping at 1 A-are specified with VP biased to 3.3 V. The AOZ8102DI's VRWM of 5.5 V ensures no conduction during normal 3.3 V operation.

How does the AOZ8102DI achieve ultra-low 1.0 pF capacitance while protecting four channels?

The AOZ8102DI achieves 1.0 pF I/O-to-GND capacitance through optimized silicon geometry and low-parasitic DFN-6 packaging with minimal die-to-pad interconnect length. Its internal steering diode structure uses shallow-junction design and precise doping profiles to reduce junction capacitance without sacrificing breakdown uniformity. The AOZ8102DI's capacitance is verified per JEDEC JESD22-A114 with 1 MHz sine wave at 0 V bias.

Is the AOZ8102DI compatible with lead-free reflow soldering processes?

Yes, the AOZ8102DI is fully compatible with lead-free reflow soldering, meeting JEDEC J-STD-020D moisture sensitivity level 1 and supporting peak temperatures up to 260°C. Its RoHS-compliant DFN-6 package and halogen-free molding compound ensure reliability under IPC-A-610 Class 2/3 assembly conditions. The AOZ8102DI's qualification includes 1000-cycle temperature cycling (−65°C to +150°C) and unbiased HAST.

What is the role of the NC pin (pin 2) in the AOZ8102DI pinout?

Pin 2 of the AOZ8102DI is a no-connect terminal-internally unconnected and electrically isolated from all active circuitry. It must be left floating or optionally tied to ground to improve mechanical stability during PCB assembly; neither configuration affects electrical performance. The AOZ8102DI's functionality remains identical regardless of pin 2's state, as confirmed in Alpha & Omega's Rev. 1.4 datasheet Figure 2 (Pin Configuration).