The **TS391CL-AL5-R** is a low-power, single voltage comparator integrated circuit (IC) designed for general-purpose electronic applications. It is often used as a more power-efficient or space-saving alternative to the classic LM393/LM339 family. --- ## 1. Technical Specifications The following table summarizes the primary electrical characteristics of the TS391 series: | Parameter | Specification | | :--- | :--- | | **Type** | Single Voltage Comparator | | **Supply Voltage (Single)** | 2V to 36V | | **Supply Voltage (Dual)** | ±1V to ±18V | | **Supply Current** | 0.8mA (Typical) | | **Input Offset Voltage** | 2mV to 5mV | | **Output Type** | Open Collector | | **Package Type** | SOT-25 (indicated by "AL5") | --- ## 2. Key Features * **Wide Supply Range:** It can operate on a wide range of voltages, making it compatible with both 3.3V/5V logic and industrial 24V systems. * **Open Collector Output:** The output requires a pull-up resistor. This allows the IC to interface with different logic levels (e.g., a 5V comparator driving a 3.3V microcontroller pin). * **Low Power Consumption:** Optimized for battery-powered devices where current draw must be minimized. * **Common-Mode Input:** The input common-mode voltage range includes ground, even when operated from a single supply. --- ## 3. Part Number Breakdown The suffixing in electronic components denotes specific packaging and environmental standards: | Code Segment | Meaning | | :--- | :--- | | **TS391** | Base part number (Low power single comparator) | | **CL** | Temperature grade and performance tier | | **AL5** | Refers to the **SOT-25** (also known as SOT-23-5) package | | **R** | Tape & Reel packaging (for automated PCB assembly) | --- ## 4. Typical Application Circuit Because the TS391 has an **open-collector output**, a pull-up resistor is mandatory for the output to reach a "High" state. ```cpp // Logic Representation VCC (Power) ---------+---------- [Pull-up Resistor] | | Input (+) ----> [ TS391 ] +------> Output (Vout) Input (-) ----> [ ] | GND ----------+-------------------------+ ``` ### Common Uses: 1. **Level Detectors:** Checking if a battery voltage has dropped below a certain threshold. 2. **Zero-Crossing Detectors:** Synchronizing circuits with AC power lines. 3. **Square Wave Generators:** Creating clock signals from analog sine waves. 4. **Limit Comparators:** Industrial sensors that trigger at specific physical limits.