# LTR-559ALS-01 (Component) ## Description Optical Sensor Ambient I2C 8-SMD, No Lead The LTR-559ALS-01 is a combined ambient light sensor and proximity sensor module designed for low-power and space-constrained applications. It integrates a photodiode array for ambient light detection and an infrared emitter with a photodiode for proximity sensing. The device provides digital output via an I²C interface and includes programmable interrupt functionality for system-level event handling. It is commonly used in mobile devices, wearable electronics, and industrial applications requiring automatic brightness control and object detection. Key Features: Integrated ambient light and proximity sensing functions High sensitivity with wide dynamic range for light measurement Infrared LED driver for proximity detection I²C digital interface for communication Programmable interrupt output Low power consumption with multiple operating modes Built-in noise cancellation and sunlight rejection Compact surface-mount package Electrical Characteristics: Supply voltage range: compatible with typical low-voltage logic systems Low standby current for power-sensitive applications Programmable gain and integration time for ambient light sensing Adjustable LED drive current for proximity sensing Optical Characteristics: Ambient light sensing with human-eye spectral response approximation Proximity detection using infrared light with high immunity to ambient light interference Interface: Communication protocol: I²C-compatible interface Supports configurable registers for threshold, timing, and interrupt control Package Information: Small form factor surface-mount package suitable for compact PCB layouts Integrated optical window for both ALS and proximity sensing Applications: Display brightness control in smartphones and tablets Proximity detection for touchless interfaces Wearable devices and IoT sensors Industrial automation and control systems Environmental and Compliance: Designed for standard commercial temperature ranges RoHS compliant and suitable for lead-free assembly processes Notes for Design Integration: Requires proper optical isolation between emitter and receiver for accurate proximity sensing PCB layout should minimize interference from external light sources Calibration may be required depending on enclosure and application conditions #commonpartslibrary #sensor #ambient ## Component Details - **Owner:** adrian95 - **Created:** 4/28/2026 - **Last Updated:** 4/28/2026 - **Visibility:** Public - **Datasheet URL:** https://optoelectronics.liteon.com/upload/download/DS86-2013-0003/LTR-559ALS-01_DS_V1.pdf - **License:** https://creativecommons.org/licenses/by/4.0/ - **Package or Case Code:** TO - **Manufacturer Name:** Lite-On Inc. - **Part Type:** Sensors - **Manufacturer Part Number:** LTR-559ALS-01 - **Used in:** 1 project - **Part Type:** Sensors - **Manufacturer:** Lite-On - **MPN:** LTR-559ALS-01 - **Mount Type:** Surface Mount - **Package / Case Code:** Module - **Pin Count:** 8 - **Compliance:** Rohs, Lead Free ## Pins | Pin | Name | Type | |-----|------|------| | 1 | SDA | | | 2 | INT | | | 3 | LDR | | | 4 | LEDK | | | 5 | LEDA | | | 6 | GND | | | 7 | SCL | | | 8 | VDD | | --- *Generated from [https://www.flux.ai/adrian95/ltr-559als-01](https://www.flux.ai/adrian95/ltr-559als-01)*