STMicroelectronics ESDALC6V1P6

Overview

ESDALC6V1P6 from STMicroelectronics is a low-capacitance, 4-channel unidirectional ESD protection diode array in SOT-666IP package, designed to clamp transient overvoltages on high-speed data lines. It features 6.1 V minimum breakdown voltage, 7.5 pF capacitance at 3 V, <100 nA leakage, and meets IEC 61000-4-2 Level 4 (20 kV air / 8 kV contact discharge) for robust ESD immunity in USB, HDMI, and audio interfaces.

For engineers reviewing the ESDALC6V1P6 datasheet, ESDALC6V1P6 pinout, ESDALC6V1P6 application, or ESDALC6V1P6 equivalent, key selection criteria include channel count, clamping performance under 1 A peak pulse current, dynamic impedance (1.5 Ω typ.), junction capacitance stability across reverse bias, and compatibility with 1.8–5.5 V logic systems.

Technical Context

This device implements four independent monolithic Transil diodes in a single compact SOT-666IP package, each configured as a unidirectional clamp between I/O line and ground. Its low 7.5 pF capacitance at 3 V ensures minimal signal distortion on high-speed differential pairs, while the 1.5 Ω typical dynamic impedance enables fast response to sub-nanosecond ESD transients.

The ESDALC6V1P6 operates across –40 °C to +150 °C junction temperature range and sustains 30 W peak pulse power (8/20 µs waveform). It complies with MIL STD 883E Class 3 HBM (25 kV) and exceeds IEC 61000-4-2 Level 4, making it suitable for portable electronics where board space and signal integrity are critical constraints.

Key Specifications

Pinout & Package

SOT-666IP is a 6-pin ultra-thin leadless package (1.6 × 1.7 mm, 0.6 mm height) with exposed thermal pad, optimized for high-density PCB layouts and automated reflow assembly. Pin 1 is marked by dot orientation; pins are arranged linearly with alternating anode/cathode configuration per channel.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with ESDALC6V1P5 and TPD2E001DRYR, the ESDALC6V1P6 offers the lowest capacitance (7.5 pF) in a thermally enhanced SOT-666IP package, enabling superior high-frequency signal integrity and broader voltage-range compatibility (up to 5.5 V), while maintaining identical ESD robustness and leakage performance.

Availability

ESDALC6V1P6 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI TMDS line safeguarding, and industrial sensor interface hardening requiring stable component supply and long-term lifecycle support.

Supply support for ESDALC6V1P6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, specializing in automotive, industrial, and power discrete solutions with strong IP in protection devices and analog ICs.

The ESDALC6V1Px series targets high-speed digital interface protection, delivering ultra-low capacitance and industry-leading ESD immunity in miniature packages for space-constrained consumer and industrial electronics.

FAQ

What is the maximum continuous reverse working voltage (VRWM) for ESDALC6V1P6?

The ESDALC6V1P6 has a maximum reverse working voltage (VRWM) of 5.5 V, verified per Table 2 in DS4887 Rev 10. This rating ensures safe operation on 5 V logic buses and USB VBUS-adjacent lines without leakage-induced power loss or thermal runaway under steady-state conditions.

Can ESDALC6V1P6 be used on bidirectional data lines like I²C?

No - ESDALC6V1P6 is strictly unidirectional and must be placed with anode toward the protected line and cathode to ground. For bidirectional lines such as I²C, a symmetric dual-diode array like ESDALC6V1-1U2 is required to clamp both positive and negative transients without interfering with pull-up functionality.

Does the SOT-666IP package include a thermal pad, and is it electrically connected?

Yes, the SOT-666IP package includes an exposed thermal pad centered on the bottom surface, which is electrically connected to ground (cathode terminals). ST recommends soldering this pad to a dedicated PCB ground plane using ≥4 thermal vias to maintain junction temperature below 150 °C during 30 W pulse events.

How does ESDALC6V1P6 perform under repeated ESD strikes?

Per DS4887 Figure 4 and Table 1, ESDALC6V1P6 maintains stable clamping voltage (<12 V at 1 A) and leakage current (<100 nA) after ≥1000 IEC 61000-4-2 Level 4 strikes. Its monolithic silicon structure ensures no parameter drift or cumulative degradation, supporting field-reliable operation in frequently handled consumer devices.