The **TSOP992..TR1** series is a member of the Vishay Semiconductors IR receiver family, designed specifically for infrared (IR) remote control systems. This component is highly miniaturized and integrated, combining a PIN diode and a preamplifier into a single package. --- ### 1. Key Technical Specifications The ".." in the part number typically denotes the carrier frequency (e.g., TSOP99238 for 38 kHz). | Feature | Specification | | :--- | :--- | | **Supply Voltage (Vcc)** | 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 (model dependent) | | **Package Type** | Surface Mount (Heimdall) | | **Directivity** | Half-angle of sensitivity: ± 45° | --- ### 2. Internal Block Diagram Functional Parts The device integrates several electronic stages to ensure clean signal output: * **PIN Photodiode:** Converts infrared light pulses into a small electrical current. * **Automatic Gain Control (AGC):** Automatically adjusts the internal gain to suppress noise from ambient light (like sunlight or CFL bulbs). * **Band Pass Filter:** Specifically tuned to a carrier frequency (e.g., 38kHz) to filter out signals from other sources. * **Demodulator:** Removes the carrier frequency and outputs the original digital data envelope. * **Open Collector Output:** The output pin is "active low," meaning it pulls the line to Ground when an IR signal is detected. --- ### 3. Pin Configuration The TSOP992 series usually follows a standard 3-pin surface mount layout: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | **OUT** | Data output; connects to Microcontroller GPIO. | | **2** | **GND** | Ground connection. | | **3** | **Vs** | Power supply (2.0V - 3.6V). | --- ### 4. Application Circuit Example To protect the sensor from power supply ripples, a simple RC filter is recommended. ```c // Typical Connection Schematic // [Vcc] ---- [Resistor 100 Ohm] ----+---- [Pin 3: Vs] // | // [Capacitor 0.1uF] // | // [GND] ----------------------------+---- [Pin 2: GND] ``` --- ### 5. Part Number Suffix Decoding * **TSOP992:** Base series (High sensitivity, Heimdall package). * **38 (or other numbers):** Represents the carrier frequency in kHz. * **TR1:** Refers to the Tape and Reel packaging specification (1 reel = 1500 pieces).