## Overview of the TSOP575..H Series The **TSOP575..H** series is a miniaturized receiver for infrared (IR) remote control systems. These parts are specifically designed by Vishay to be highly resistant to ambient light interference and are packaged in a surface-mount format. The series is commonly used in consumer electronics (TVs, air conditioners, audio systems) to receive signals from handheld remotes. --- ### Key Technical Specifications | Parameter | Value / Range | | :--- | :--- | | **Supply Voltage ($V_S$)** | 2.5 V to 5.5 V | | **Carrier Frequency ($f_o$)** | 30 kHz to 56 kHz (depends on suffix) | | **Supply Current ($I_S$)** | 0.7 mA (typical) | | **Transmission Distance** | Up to 40 meters | | **Operating Temperature** | -25 °C to +85 °C | | **Package Type** | Belobog (Surface Mount) | --- ### Internal Functional Blocks The TSOP575..H is an Integrated Circuit (IC) that combines several electronic components into one package: 1. **Photodetector:** A PIN diode that converts IR light into an electrical current. 2. **Preamplifier:** Enhances the weak signal from the photodetector. 3. **Automatic Gain Control (AGC):** Adjusts sensitivity to ignore continuous noise (like fluorescent lights) while focusing on pulsed signals. 4. **Bandpass Filter:** Tunes the receiver to a specific carrier frequency (e.g., 38 kHz). 5. **Demodulator:** Removes the carrier frequency and outputs the original data pulses. --- ### The "..H" Suffix Meaning The **"H"** in the part number indicates the **Heimdall** package style or a specific lead-bend/molding configuration. In the Vishay IR receiver ecosystem: * **TSOP57x:** Refers to the internal AGC (Automatic Gain Control) version. * **H:** Usually denotes a lead-frame or package variant optimized for specific mounting (often side-view or specific surface mount orientations). --- ### Typical Application Circuit To use the TSOP575..H, a simple RC filter is recommended to stabilize the power supply: ```text VCC (2.5V - 5.5V) | [R1: 100 Ohm] | +-------+----------- Pin 2 (Vs) | | [C1: 0.1uF] [TSOP575..H] | | GND -----+----------- Pin 3 (GND) | +----------- Pin 1 (OUT) ---> To Microcontroller ``` ---