## Overview of the TSOP936 Series The **TSOP936** series is a miniaturized Receiver Module for infrared (IR) remote control systems. It integrates a PIN diode and a preamplifier into a single package, with an internal filter for Pulse Code Modulation (PCM) frequency. ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Supply Voltage (Vs)** | 2.0 V to 3.6 V | | **Supply Current (Is)** | 0.35 mA (typical) | | **Transmission Distance** | Up to 40 meters | | **Carrier Frequency** | 30 kHz to 56 kHz (Specific to sub-series) | | **Directivity** | Half angle: ± 45° | | **Package Style** | Belobog (Surface Mount) | --- ### 2. Internal Block Diagram components The TSOP936 is more than just a sensor; it is an Integrated Circuit (IC) that performs several stages of signal processing: 1. **PIN Photodiode**: Converts incoming infrared light pulses into electrical signals. 2. **Preamplifier**: Boosts the weak electrical signal from the photodiode. 3. **Automatic Gain Control (AGC)**: Adjusts the gain to handle different lighting environments and distances. 4. **Band Pass Filter**: Filters out noise and only allows the specific carrier frequency (e.g., 38kHz) to pass. 5. **Demodulator**: Removes the carrier wave to output the original data signal (the "envelope"). --- ### 3. Pin Configuration The device typically features three pins. While the physical layout depends on the specific SMD orientation, the functional pins are: | Pin Number | Name | Function | |:---:|:---:|:---| | 1 | **OUT** | Data output; active low. | | 2 | **GND** | Ground connection. | | 3 | **Vs** | Power supply (2.0V - 3.6V). | --- ### 4. Application Circuit Example To ensure stable operation and noise immunity, a simple RC filter is recommended for the power supply pin. ```c // Typical Connection Logic [Power Supply 3.3V] --- [Resistor 100Ω] ---+--- [Pin 3: Vs] | [Capacitor 4.7µF] | [Ground] [Pin 1: OUT] -------------------------- [Microcontroller GPIO] [Pin 2: GND] -------------------------- [Ground] ``` ### 5. Features and Benefits * **Improved Immunity**: Specifically designed to suppress noise from energy-saving lamps (CFLs) and Wi-Fi signals. * **Low Power Consumption**: Ideal for battery-operated devices due to the very low supply current. * **Small Footprint**: The Belobog package is very thin, making it suitable for modern slim electronics like TVs and tablets.