STMicroelectronics ESDAXLC6-1BT2

Overview

ESDAXLC6-1BT2 from STMicroelectronics is a bidirectional single-line TVS diode for high-speed I/O protection, featuring 0.4 pF junction capacitance, 12 GHz bandwidth, ±16 kV contact/±30 kV air ESD immunity per IEC 61000-4-2, and operation from –55 °C to +150 °C. It protects USB 3.0, Ethernet, RF front-end, and digital video interfaces while preserving signal integrity.

For engineers reviewing the ESDAXLC6-1BT2 datasheet, ESDAXLC6-1BT2 pinout, ESDAXLC6-1BT2 application, or ESDAXLC6-1BT2 equivalent, this device delivers ultra-low capacitance and high-frequency ESD clamping critical for 5 Gbps+ serial links, automotive infotainment data lines, and 5G RF module input protection.

Technical Context

This ESD protection device uses silicon avalanche technology with symmetrical bidirectional clamping, enabling equal response to positive and negative transients without polarity dependency. Its low dynamic resistance (2 Ω at 16 A TLP) ensures rapid voltage suppression during sub-nanosecond ESD events.

The 0.4 pF capacitance is measured at 200 MHz–3 GHz with 30 mV oscillator bias, and its –3 dB cutoff at 12 GHz confirms minimal insertion loss in high-speed differential pairs. Standoff voltage is 6 V (min), clamping voltage is 17 V at 1 A (8/20 µs), and peak pulse power is rated at 40 W.

Key Specifications

Pinout & Package

ESDAXLC6-1BT2 is housed in a SOD882T (0402) surface-mount package - a 2-terminal, bidirectional monolithic TVS diode with no internal ground reference. The package measures 1.00 × 0.60 × 0.40 mm (L × W × H) and features solderable terminations compatible with standard 0402 reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPD2E001DRYR and SP1003-01UTG, ESDAXLC6-1BT2 uniquely balances 12 GHz bandwidth, ±16 kV contact ESD, and 0.4 pF capacitance in a standard 0402 footprint-making it optimal for automotive-grade high-speed data links requiring both ruggedness and signal fidelity.

Availability

ESDAXLC6-1BT2 is available at Aetrix Electronics and suitable for USB 3.0 interface protection, automotive infotainment display links, and RF front-end antenna switching requiring stable component supply across extended temperature ranges and high-volume production cycles.

Supply support for ESDAXLC6-1BT2 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, designing and manufacturing microcontrollers, power ICs, sensors, and protection devices for automotive, industrial, and consumer markets.

ESDAXLC6-1BT2 belongs to ST's XLC (Extra Low Capacitance) ESD protection product line, engineered specifically for preserving signal integrity on multi-gigabit serial interfaces while meeting stringent automotive and industrial EMC standards.

FAQ

What is the maximum recommended PCB trace length between ESDAXLC6-1BT2 and the protected I/O pin?

ST recommends placing the device within 3 mm of the protected I/O pin to minimize parasitic inductance. Longer traces degrade clamping performance-especially above 2 GHz-due to added series inductance that increases voltage overshoot during ESD events. Layout guidelines in DS9261 specify symmetric, short, and direct routing with no vias near the device.

Does ESDAXLC6-1BT2 require a dedicated ground plane connection?

No dedicated ground plane is required, but low-inductance grounding is essential. The device must connect to the system's main signal ground via the shortest possible path-ideally using multiple thermal vias directly beneath Pin 2. Shared ground paths with noisy digital circuits should be avoided to prevent ESD current injection into sensitive analog sections.

Can ESDAXLC6-1BT2 be used on differential pairs without degrading common-mode rejection?

Yes-its symmetrical bidirectional structure and matched capacitance (<0.1 pF mismatch) ensure balanced clamping on differential lines like USB 3.0 or MIPI D-PHY. ST's characterization shows <0.5 dB common-mode insertion loss imbalance up to 6 GHz, preserving CMRR when placed identically on both conductors with identical trace lengths.

Is the SOD882T (0402) package compatible with automated optical inspection (AOI) systems?

Yes-the SOD882T package features laser-marked "T" identification and consistent solder joint reflectivity. AOI systems configured for 0402 components can reliably detect tombstoning, bridging, and insufficient solder volume when using ST's recommended stencil opening (0.428 × 0.522 mm) and halide-free paste per J-STD-004 ROL0.