The **TS391CL-AF5-R** is a high-performance, low-power **Single Voltage Comparator** manufactured by UTC (Unisonic Technologies). It is designed to operate from a single power supply over a wide range of voltages and is commonly used in battery-powered portable electronics. --- ## 1. Technical Specifications The following table summarizes the core electrical characteristics of the TS391CL-AF5-R: | Parameter | Specification | | :--- | :--- | | **Supply Voltage (Single)** | 2.0V to 36V | | **Supply Voltage (Dual)** | ±1.0V to ±18V | | **Supply Current** | 0.8mA (Typical) | | **Input Offset Voltage** | 1.0mV (Typical) | | **Input Bias Current** | 25nA (Typical) | | **Output Type** | Open Collector | | **Package Type** | SOT-25 / SOT-23-5 | | **Operating Temperature** | -40°C to +85°C | --- ## 2. Key Features * **Wide Supply Range:** It can operate on very low voltages (2V), making it compatible with digital systems (3.3V, 5V) and industrial rails (24V). * **Low Power Consumption:** The current drain is independent of the supply voltage, which preserves battery life in mobile devices. * **Open Collector Output:** This allows the device to drive loads connected to different voltages (Level Shifting). Multiple TS391 outputs can be connected together to create a "Wired-OR" configuration. * **Input Common-Mode Range:** Includes ground, even when operated from a single supply voltage. --- ## 3. Pin Configuration (SOT-25) The TS391CL-AF5-R typically follows the standard 5-pin layout: 1. **OUT:** Output (Open Collector) 2. **V- / GND:** Negative Supply or Ground 3. **IN+:** Non-Inverting Input 4. **IN-:** Inverting Input 5. **V+:** Positive Supply --- ## 4. Common Applications Due to its small footprint and low power requirements, it is frequently found in: * **Limit Comparators:** Checking if a sensor voltage exceeds a threshold. * **Zero-Crossing Detectors:** Detecting when an AC signal passes through 0V. * **Battery Monitors:** Triggering an alert when voltage drops below a safe level. * **Pulse/Square Wave Generators:** Converting analog signals into digital pulses. --- ## 5. Usage Note: Pull-Up Resistor Because the TS391 has an **Open Collector output**, it cannot "push" voltage out on its own. To get a high logic level (Logic 1), you **must** connect a pull-up resistor from the Output pin to the desired logic voltage (e.g., Vcc).