STMicroelectronics X-NUCLEO-53L1A2

Overview

X-NUCLEO-53L1A2 from STMicroelectronics is an Arduino UNO R3–compatible expansion board for STM32 Nucleo development platforms (e.g., NUCLEO-F401RE, NUCLEO-L476RG), integrating dual VL53L1 Time-of-Flight ranging sensors with multi-object detection, programmable field-of-view (FoV), and Class 1 laser safety compliance per IEC 60825-1:2014.

For engineers reviewing the X-NUCLEO-53L1A2 datasheet, X-NUCLEO-53L1A2 pinout, X-NUCLEO-53L1A2 application, or X-NUCLEO-53L1A2 equivalent, this board enables rapid prototyping of precision distance-sensing systems requiring sub-millimeter resolution, air-gap simulation (0.25/0.5/1 mm spacers), cover-glass integration, and co-location with Bluetooth/Wi-Fi expansion boards via stackable Arduino connectors.

Technical Context

The X-NUCLEO-53L1A2 serves as a hardware interface and evaluation platform-not a semiconductor IC-between STM32 Nucleo host controllers and two VL53L1 ToF sensor modules. It routes I²C, GPIO, and power signals via dual 10-pin connectors and supports flying-wire integration of VL53L1 mini-PCBs for embedded deployment.

It implements laser safety circuitry aligned with ST's VL53L1 configuration guidelines, includes mechanical spacers to emulate optical air gaps under cover glass, and provides pre-aligned mounting for two interchangeable cover windows-enabling repeatable optical calibration across varying environmental enclosures.

Key Specifications

Availability

X-NUCLEO-53L1A2 is available at Aetrix Electronics and suitable for industrial automation sensing, robotics proximity control, smart home occupancy detection, and consumer electronics gesture interface development requiring stable component supply and rapid evaluation-to-deployment capability.

Supply support for X-NUCLEO-53L1A2 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 microcontrollers, sensors, power management, and analog/mixed-signal ICs for industrial, automotive, and consumer applications.

The X-NUCLEO series is ST's dedicated line of Arduino-compatible expansion boards designed to accelerate evaluation and integration of ST sensor and connectivity technologies into STM32-based embedded systems.

FAQ

Does X-NUCLEO-53L1A2 include VL53L1 sensors?

No-the X-NUCLEO-53L1A2 is an expansion board only and does not contain integrated VL53L1 chips. It ships with two optional VL53L1 breakout boards (sold separately or as part of kit variants), which connect via dual 10-pin headers or flying wires. The board provides routing, power regulation, and mechanical mounting for those sensors.

Can X-NUCLEO-53L1A2 be used with non-STMCU development boards?

It is electrically and mechanically compatible only with Arduino UNO R3–pinout hosts. While it may physically attach to other Arduino-compatible boards, full functionality-including I²C address handling, GPIO mapping, and software support-is validated exclusively for STM32 Nucleo boards (e.g., F401RE, L476RG) using ST's official firmware and STM32CubeMX toolchain.

What is the purpose of the 0.25/0.5/1 mm spacers?

These spacers are precision-machined shims placed between the cover glass and VL53L1 sensor window to simulate real-world air gaps in sealed enclosures. They enable developers to characterize and compensate for optical refraction effects-critical for maintaining ±1 mm ranging accuracy when integrating the sensor behind protective glass in final products.

Is the laser output user-adjustable?

No-laser drive parameters are fixed in firmware and hardware to ensure permanent Class 1 compliance. ST explicitly prohibits modification of laser settings or addition of external optics. Any alteration voids safety certification and risks regulatory non-compliance per IEC 60825-1:2014, and invalidates ST's warranty and technical support.