Vishay VCNL4040M3OE SMD-8P Ambient Light Sensor Module

The Vishay VCNL4040M3OE operates from a supply voltage of 2.5V to 3.6V DC. This range makes it directly compatible with standard 3.3V logic levels found in most modern microcontrollers like ESP32, Raspberry Pi, and STM32, without requiring a level shifter.

This module uses a standard I²C (Inter-Integrated Circuit) digital interface for communication. It provides a simple two-wire connection (SDA and SCL) to the host microcontroller, allowing for easy reading of ambient light levels and configuration of sensor parameters like integration time and interrupt thresholds.

Yes, the VCNL4040M3OE is a combined sensor integrating both ambient light sensing (ALS) and proximity detection functions. It contains a dedicated infrared emitter and a photodiode to detect reflected IR light for object proximity measurement, alongside the primary ambient light sensing photodiode, all within the same 8-pin package.

The primary application is automatic display brightness control in consumer electronics. It accurately measures ambient light intensity to dynamically adjust screen backlighting, improving visibility and saving power. It is also used in IoT devices, automotive interiors, and industrial panels for adaptive lighting and proximity-based features.