Alpha & Omega Semiconductor Inc. AOZ8235DI-05

Overview

AOZ8235DI-05 from Alpha and Omega Semiconductor is a five-line unidirectional or four-line bidirectional TVS diode array designed for ESD and transient protection of high-speed data lines. It features 5.0 V reverse working voltage, ±18 kV IEC 61000-4-2 contact/air ESD rating, 13.5–16.0 pF junction capacitance, and low 12.0 V / –10.0 V clamping at 15 A, used in portable GPS, digital cameras, and notebook computer I/O interfaces.

For engineers reviewing the AOZ8235DI-05 datasheet, pinout, applications, or equivalent options, key selection considerations include clamping voltage under 15 A transients, bidirectional vs. unidirectional configuration flexibility, DFN 1.45 × 1.0 mm package footprint, and compatibility with IEC 61000-4-2 Level 4 ESD immunity requirements.

Technical Context

The AOZ8235DI-05 implements Trench Vertical Structure [TVS]²™ technology to achieve low clamping voltage and fast response to ESD events. It supports two distinct protection configurations: five unidirectional channels (pins 1/3/4/5/6 to signal, pin 2 to ground) or four bidirectional channels (pins 1/3/4/6 to signal, pin 5 to ground).

Its electrical behavior is defined by 6.0 V typical breakdown voltage at 1 mA, 0.1 µA reverse leakage at 5.0 V VRWM, and 0.7 V forward voltage at 10 mA - enabling robust protection without signal distortion on 5 V data buses. The 100 ns pulse test condition for VCL ensures relevance to real-world ESD waveforms.

Key Specifications

Pinout & Package

AOZ8235DI-05 is housed in a RoHS-compliant, lead-free DFN-6 (1.45 × 1.0 mm) package with exposed thermal pad. Pin 1 is marked by dot; pin numbering follows top-view clockwise sequence starting from dot corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ5.0A and TPD4E05U06DQAR, the AOZ8235DI-05 uniquely balances five-line configurability, ±18 kV ESD margin, and 13.5–16.0 pF capacitance - making it optimal for compact 5 V data interfaces where both channel count and signal integrity matter.

Availability

AOZ8235DI-05 is available at Aetrix Electronics and suitable for portable GPS, digital cameras, and notebook computer designs requiring stable component supply, RoHS-compliant packaging, and certified IEC 61000-4-2 Level 4 ESD protection.

Supply support for AOZ8235DI-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 using proprietary trench technologies.

The AOZ8235DI-05 belongs to AOS's TVS Diode Array product line, engineered specifically for space-constrained, high-speed consumer electronics requiring certified ESD immunity without sacrificing signal fidelity.

FAQ

What is the maximum clamping voltage of AOZ8235DI-05 under IEC 61000-4-2 ESD stress?

The AOZ8235DI-05 achieves a maximum clamping voltage of 12.0 V for positive transients and –10.0 V for negative transients at 15 A, 100 ns pulse width. This performance is measured per IEC 61000-4-2 test conditions and ensures downstream ICs remain within safe operating voltage limits during ±18 kV contact discharge events. The AOZ8235DI-05 maintains this clamping performance across its full –40 °C to +85 °C operating range.

Can AOZ8235DI-05 protect both unidirectional and bidirectional signal lines simultaneously?

No - the AOZ8235DI-05 must be configured exclusively for either five unidirectional lines (using pin 2 as ground) or four bidirectional lines (using pin 5 as ground); it does not support mixed-mode operation. Each configuration requires dedicated PCB layout: unidirectional mode routes pins 1/3/4/5/6 to signals and pin 2 to ground, while bidirectional mode routes pins 1/3/4/6 to signals and pin 5 to ground. The AOZ8235DI-05 datasheet provides separate schematic diagrams for both topologies.

What is the junction capacitance of AOZ8235DI-05 and how does it affect high-speed data lines?

The AOZ8235DI-05 exhibits 13.5–16.0 pF junction capacitance per channel at 0 V bias and 1 MHz, verified per manufacturer test conditions. This low capacitance prevents excessive signal rise-time degradation on 480 Mbps USB 2.0 and 1.65 Gbps HDMI 1.4 data lanes. Measured insertion loss remains below 0.5 dB up to 500 MHz, confirming suitability for these interfaces without equalization. The AOZ8235DI-05's capacitance is stable across temperature and bias, ensuring consistent performance in portable devices.

Does AOZ8235DI-05 meet automotive-grade temperature requirements?

The AOZ8235DI-05 is rated for –40 °C to +85 °C ambient operation, aligning with commercial and industrial temperature grades but not extended automotive (–40 °C to +125 °C) requirements. Its junction temperature limit is +125 °C, but sustained operation above +85 °C ambient is not characterized or guaranteed. For automotive infotainment or ADAS applications requiring AEC-Q200 qualification, alternate AOS devices such as AOZ8250DI-05 (AEC-Q200 qualified) should be evaluated instead of AOZ8235DI-05.

How is the ground connection implemented for optimal ESD suppression with AOZ8235DI-05?

Optimal ESD suppression requires a low-inductance ground path: in unidirectional mode, pin 2 must connect directly to the PCB ground plane via a short, wide trace (<3 mm) and multiple vias; in bidirectional mode, pin 5 serves as ground and follows the same rule. The AOZ8235DI-05 datasheet specifies that ground path inductance must be minimized to prevent voltage overshoot during 1 ns ESD rise times. Layout guidelines also mandate placing the AOZ8235DI-05 within 5 mm of the protected connector and avoiding routing protected traces near board edges.