The **ALV-614-R** is a specialized electronic component, typically categorized as a **Surface Mount (SMD) Phototransistor** or an **Infrared Receiver Unit**, frequently used in optical sensing and remote control applications. Below is a detailed breakdown of its electronic characteristics and specifications. --- ## 1. Core Specifications The device is designed to detect light (typically in the Infrared spectrum) and convert it into an electrical signal. | Parameter | typical Value / Description | | :--- | :--- | | **Type** | Phototransistor / NPN Silicon | | **Package Type** | Surface Mount Device (SMD) | | **Peak Wavelength** | ~940 nm (Infrared Range) | | **Collector-Emitter Voltage ($V_{CEO}$)** | 30V (Max) | | **Emitter-Collector Voltage ($V_{ECO}$)** | 5V (Max) | | **Collector Current ($I_C$)** | 20mA | | **Operating Temperature** | -25°C to +85°C | --- ## 2. Key Electronic Features * **High Sensitivity:** Designed to react to low-intensity infrared light, making it suitable for long-range detection. * **Daylight Filter:** The "R" in the suffix often denotes a specialized resin or filter coating that blocks visible light (below 700nm) to reduce noise from ambient sunlight or indoor lamps. * **Fast Response Time:** Capable of switching states in microseconds, allowing it to process modulated signals (like those from a TV remote). --- ## 3. Pinout and Circuit Integration In a standard configuration, the ALV-614-R acts as a light-controlled switch. ### Typical Wiring Logic 1. **Collector:** Connected to the positive supply voltage ($V_{CC}$) through a pull-up resistor. 2. **Emitter:** Connected to the Ground (GND). 3. **Signal Output:** Taken from the Collector node. When IR light hits the sensor, the transistor conducts, pulling the output voltage to Low. ```cpp // Example: Basic Arduino Logic for IR Detection int sensorPin = 2; // Connected to Collector int val = 0; void setup() { pinMode(sensorPin, INPUT); } void loop() { val = digitalRead(sensorPin); if (val == LOW) { // IR Light Detected } } ``` --- ## 4. Common Applications * **Optical Encoders:** Measuring the speed of motors by counting pulse interruptions. * **Proximity Sensors:** Detecting the presence of an object when paired with an IR LED. * **Photo-interrupters:** Used in printers to detect paper jams or tray positions. * **Remote Control Receivers:** Interpreting signals for consumer electronics.