The **SML-R13YWT87P** is a high-brightness surface-mount (SMD) LED manufactured by **ROHM Semiconductor**. It belongs to the SML-R1 series, characterized by its compact size and high reliability. --- ## 1. Technical Specifications The following table highlights the primary electrical and optical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Color** | Yellow | | **Wavelength ($\lambda_D$)** | 591 nm (Typical) | | **Luminous Intensity ($I_V$)** | 25 to 63 mcd @ 20mA | | **Forward Voltage ($V_F$)** | 2.0 V (Typical) | | **Maximum Forward Current ($I_F$)** | 25 mA | | **Operating Temperature** | -40°C to +85°C | | **Package Size** | 0603 (1608 Metric) | | **Dimensions** | 1.6 x 0.8 x 0.36 mm | --- ## 2. Key Features * **Ultra-Thin Profile:** With a height of only 0.36 mm, it is ideal for thin-profile devices like smartphones and wearable technology. * **Material Composition:** It utilizes **AlGaInP** (Aluminum Gallium Indium Phosphide) technology, which offers superior brightness compared to older GaAsP technologies. * **Package Type:** It is a 1608 (metric) / 0603 (inch) chip LED. * **Polarity:** The cathode is usually marked with a green square or a notch on the underside of the package. --- ## 3. Recommended Application Circuit When integrating this LED into a circuit, a current-limiting resistor is required to prevent damage. ```python # Formula to calculate the Resistor (R): # R = (V_source - V_forward) / I_forward # Example for a 5V system: V_source = 5.0 V_forward = 2.0 I_forward = 0.020 # 20mA R = (5.0 - 2.0) / 0.020 # R = 150 Ohms ``` --- ## 4. Common Applications 1. **Status Indicators:** Power-on lights for consumer electronics. 2. **Backlighting:** Illumination for keypads, LCDs, and push buttons. 3. **Automotive:** Dashboard indicators and internal console lighting. 4. **Mobile Devices:** Battery level indicators in handheld gadgets.