STMicroelectronics ESDAXLC6-1BT2Y

Overview

ESDAXLC6-1BT2Y from STMicroelectronics is an AEC-Q101-qualified bidirectional ESD protection diode for high-speed automotive data lines, featuring 0.4 pF typical junction capacitance, 12 GHz -3 dB bandwidth, 6 V minimum breakdown voltage, and ±16 kV contact ESD immunity per ISO 10605 (C = 150 pF, R = 330 Ω). It protects APIX, LVDS, USB 3.0, and RF front-end interfaces in harsh under-hood environments.

For engineers reviewing the ESDAXLC6-1BT2Y datasheet, ESDAXLC6-1BT2Y pinout, ESDAXLC6-1BT2Y application, or ESDAXLC6-1BT2Y equivalent, key selection criteria include ultra-low capacitance for signal integrity preservation, automotive-grade thermal robustness (-55 °C to +150 °C), and validated ISO 7637-3 pulse immunity for 12 V/24 V vehicle electrical systems.

Technical Context

This device uses a silicon avalanche diode structure optimized for low-capacitance transient clamping on single high-speed I/O lines. Its bidirectional configuration enables symmetric clamping of both positive and negative ESD transients without polarity constraints.

It delivers 1.3 A peak pulse current (8/20 µs) with 17 V clamping voltage at 1 A, and exhibits <2 Ω dynamic resistance under TLP testing - critical for minimizing voltage overshoot during fast-rising ESD events while preserving signal fidelity up to 12 GHz.

Key Specifications

Pinout & Package

ESDAXLC6-1BT2Y is housed in a SOD882T (0402) surface-mount package with two terminals: Pin 1 (anode/cathode junction input) and Pin 2 (GND reference). The flow-through routing minimizes parasitic inductance and maintains impedance continuity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and ESDALC6V1-1U2, ESDAXLC6-1BT2Y uniquely combines AEC-Q101 qualification, 0.4 pF capacitance, and 0402 form factor - enabling compact, high-fidelity ESD protection on space-constrained automotive high-speed PCBs where signal rise times are <100 ps.

Availability

ESDAXLC6-1BT2Y is available at Aetrix Electronics and suitable for automotive ADAS camera links, in-vehicle Ethernet gateways, and telematics USB 3.0 interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ESDAXLC6-1BT2Y 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, Switzerland, specializing in automotive, power, analog, and microcontroller technologies with vertical manufacturing capabilities.

This device belongs to ST's ESDA-XLC ultra-low-capacitance protection portfolio, engineered specifically for high-speed serial interface protection in automotive electronics where signal integrity and AEC-Q101 reliability are non-negotiable.

FAQ

What is the maximum recommended PCB trace length between ESDAXLC6-1BT2Y and the protected IC?

Trace length should be ≤2 mm from device to IC pad to minimize inductance-induced voltage overshoot during ESD events. Longer traces degrade clamping effectiveness - measured V_CL increases by ~3 V per additional 1 mm due to L·di/dt effects. Layout must maintain 50 Ω controlled impedance and avoid vias near the device.

Does ESDAXLC6-1BT2Y require external biasing or series resistors?

No external biasing or series resistors are needed. It operates passively as a voltage-triggered clamp with 50 nA leakage at 3 V. Series resistors would degrade high-frequency performance and are incompatible with its 0.4 pF design target; ST's recommended footprint assumes direct connection to signal and ground planes.

Can ESDAXLC6-1BT2Y protect differential pairs without degrading common-mode rejection?

Yes - when placed identically on both lines of a differential pair (e.g., one device per line), it maintains balanced capacitance (<0.05 pF mismatch) and preserves CMRR >30 dB up to 5 GHz. Its symmetrical bidirectional structure avoids DC offset and ensures matched transient response on both conductors.

How does ESDAXLC6-1BT2Y perform under repeated ESD stress?

Per AEC-Q101 stress testing, it withstands ≥1000 ESD strikes at ±16 kV contact discharge without parameter shift beyond spec limits. Post-stress measurements show <5% change in V_BR and <0.05 pF increase in C_{I/O-GND, confirming robustness for field-replaceable automotive connectors subject to frequent handling.}