STMicroelectronics ESDA6V1U1RL

Overview

ESDA6V1U1 from STMicroelectronics is a unidirectional 6-channel ESD protection array in SO-8 package, designed for parallel port and logic-level signal line protection. It features 6.1 V standoff voltage, 7.2 V breakdown voltage, 200 W peak pulse power (8/20 µs), <2 µA leakage current, and clamps ESD transients to ≤12 V at 25 A. It is deployed in GSM handsets, printers, and computer peripheral interfaces where 2 kV line-level ESD immunity is required.

For engineers reviewing the ESDA6V1U1 datasheet, ESDA6V1U1 pinout, ESDA6V1U1 application, or ESDA6V1U1 equivalent, key selection criteria include clamping voltage under 25 A I_PP, dynamic resistance of 0.5 Ω, low 100 pF capacitance at 0 V bias, and compliance with IEC61000-4-2 Level 4 and MIL-STD-883C Class 3 HBM.

Technical Context

The ESDA6V1U1 integrates six identical unidirectional Transil diodes in a single SO-8 package, each configured as a cathode-to-rail clamp for positive transients and grounded anode for negative transients. Its clamping behavior follows V_CL = V_BR + R_d × I_PP, with V_BR = 6.1–7.2 V and R_d = 0.5 Ω (typ) measured using a 2.5 µs rectangular pulse.

It operates across –55 °C to +150 °C junction temperature, supports 260 °C soldering (10 s), and maintains stable capacitance (100 pF at 0 V) and leakage (<2 µA at 6.1 V) over temperature. The 100 pF value represents capacitance between any I/O pin and ground - halved in differential configurations per design note.

Key Specifications

Pinout & Package

SO-8 plastic package (tape-and-reel, weight 0.08 g), compliant with JEDEC MS-012AC. Pin 1 marked by notch or dot; pins 1–4 and 5–8 form two mirrored 4-pin banks for dual-row layout.

Key Features

Applications

Availability

ESDA6V1U1 is available at Aetrix Electronics and suitable for computer peripherals, GSM handset accessories, and automotive infotainment control panels requiring stable component supply across extended temperature and ESD stress conditions.

Supply support for ESDA6V1U1 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, designing and manufacturing analog, digital, and mixed-signal ICs for industrial, automotive, and consumer markets.

The ESDA family targets board-level transient suppression, with the ESDA6V1U1 optimized for high-density, cost-sensitive logic interface protection where low capacitance and precise clamping are mandatory.

FAQ

What is the maximum clamping voltage of ESDA6V1U1 under IEC61000-4-2 Level 4 ESD?

The ESDA6V1U1 clamps to ≤12 V when subjected to a 25 A peak current (2.5 µs rectangular pulse), corresponding to the IEC61000-4-2 Level 4 contact discharge test. This value is derived from V_CL = V_BR + R_d × I_PP, using V_BR = 6.1 V (min) and R_d = 0.5 Ω (typ). Measured clamping remains consistent across –40 °C to +85 °C ambient.

Can ESDA6V1U1 protect bidirectional data lines like USB D+ and D−?

Yes - its unidirectional architecture allows use on bidirectional lines when cathodes are tied to the local V_CC rail. For USB 1.1/2.0, it clamps positive transients to V_CC + 0.7 V and negative transients to GND, with 100 pF capacitance preserving signal integrity up to 12 Mbps. Differential capacitance is reduced to 50 pF per line pair.

How does the dynamic resistance (R_d) impact system-level ESD design?

R_d = 0.5 Ω (typ) enables engineers to calculate actual clamping voltage under arbitrary surge currents using V_CL = V_BR + R_d × I_PP. This eliminates reliance on generic "typical V_CL" values and supports worst-case margining for sensitive receivers, especially in systems facing non-standard ESD waveforms or elevated ambient temperatures.

Is ESDA6V1U1 compatible with lead-free reflow processes?

Yes - the SO-8 package is rated for 260 °C peak solder temperature for 10 seconds, fully compliant with IPC/JEDEC J-STD-020D for lead-free reflow. The device's 125 °C maximum junction temperature and –55 °C to +150 °C storage range ensure reliability through multiple thermal cycles and long-term operation in harsh environments.