The **LAT676-R** is a specific variant of the TOPLED series surface-mount LED manufactured by **OSRAM Opto Semiconductors** (now ams OSRAM). It is widely used in automotive, industrial, and consumer electronics due to its reliability and standard footprint. --- ### 1. General Specifications The "LAT676-R" part number defines several key characteristics, most notably its color (Amber) and its brightness binning. | Parameter | Specification | | :--- | :--- | | **Package Type** | SMT (TOPLED) | | **Emitting Color** | Amber (Orange-Yellow) | | **Peak Wavelength** | ~624 nm | | **Dominant Wavelength** | 612 - 624 nm | | **Luminous Intensity** | 112 - 180 mcd (Bin R) | | **Viewing Angle** | 120° (Lambertian emitter) | --- ### 2. Electrical Characteristics The device operates as a standard semiconductor diode. Below are the typical electrical ratings: | Parameter | Value (Typical) | Max Rating | | :--- | :--- | :--- | | **Forward Current ($I_F$)** | 20 mA | 30 mA | | **Forward Voltage ($V_F$)** | 2.0 V | 2.6 V | | **Reverse Voltage ($V_R$)** | --- | 12 V | | **Power Consumption** | --- | 80 mW | | **Operating Temperature** | -40°C to +100°C | --- | --- ### 3. Part Number Breakdown (Nomenclature) Understanding the suffix helps identify the exact performance tier: * **LA**: Color Code (Amber). * **T676**: Package Type (Standard TOPLED). * **R**: Luminous Intensity Binning. The "R" indicates a brightness range between **112 and 180 mcd** at 20mA. --- ### 4. Key Features & Applications * **Wide Viewing Angle:** The 120-degree spread makes it ideal for backlighting. * **High Reliability:** Designed for harsh environments, making it a staple in automotive dashboards. * **Standard Footprint:** Uses the PLCC-2 (3.2 x 2.8 mm) package, which is compatible with most automated SMT assembly lines. **Common Use Cases:** 1. **Automotive:** Dashboard indicators, switches, and interior lighting. 2. **Industrial:** Status indicators on control panels. 3. **Consumer:** Backlighting for LCDs and membrane switches. --- ### 5. Mechanical Dimensions ```text Package: PLCC-2 Length: 3.2 mm Width: 2.8 mm Height: 2.1 mm Cathode Mark: Beveled corner on the package ```