## Overview of the TSSP60.. Series The **TSSP60..** series (such as TSSP6038) consists of compact infrared (IR) sensor modules designed for sensor applications. Unlike standard IR receivers used for remote controls (which filter out continuous signals), the TSSP series is optimized for **reflective sensing**, **proximity detection**, and **light barrier** systems. ### Key Technical Specifications | Feature | Description | | :--- | :--- | | **Carrier Frequency** | Available in 38 kHz (TSSP6038) or 56 kHz (TSSP6056) | | **Supply Voltage** | 2.5 V to 5.5 V | | **Supply Current** | Approx. 0.7 mA | | **Output Type** | Active Low (Logic 0 when IR is detected) | | **Detection Distance** | Up to 12 meters (depending on emitter and optics) | | **Sensitivity** | High sensitivity to IR bursts and continuous signals | --- ### Internal Functional Blocks The TSSP60.. integrates several electronic components into a single three-pin package (VS, GND, and OUT): 1. **Photo Diode:** Converts incoming infrared light into an electrical signal. 2. **Preamplifier:** Boosts the weak signal from the photodiode. 3. **Automatic Gain Control (AGC):** Adjusts the sensitivity based on ambient light levels to prevent false triggering. 4. **Band Pass Filter:** Specifically tuned to the carrier frequency (e.g., 38 kHz) to ignore sunlight and other light sources. 5. **Demodulator:** Converts the high-frequency bursts into a clean digital pulse. --- ### Wiring Configuration The TSSP60.. series typically uses a standard 3-pin layout. Below is the typical connection logic: ```c Pin 1: OUT --> Connect to Microcontroller Input (GPIO) Pin 2: GND --> Connect to System Ground Pin 3: VS --> Connect to 2.5V - 5.5V Power Supply ``` *Note: It is recommended to add a 100 $\Omega$ resistor and a 4.7 $\mu$F capacitor between VS and GND to suppress power supply noise.* --- ### Comparison: TSSP vs. TSOP It is important to distinguish the TSSP series from the more common TSOP series: * **TSOP Series:** Designed for IR Remote Controls. They have logic that suppresses continuous signals to avoid interference. * **TSSP Series:** Designed for Proximity/Barriers. They can handle a **continuous** carrier signal, making them ideal for counting objects on a conveyor or detecting if a door is open. ---