The **TS391-AL5-R** is a low-power, single-voltage comparator integrated circuit (IC) manufactured by Unisonic Technologies (UTC). It is widely used in applications where space is limited and power efficiency is critical. --- ### ## Technical Specifications The table below highlights the key electrical and physical characteristics of the TS391-AL5-R: | Feature | Specification | | :--- | :--- | | **Package Type** | SOT-25 / SOT-23-5 | | **Supply Voltage Range** | 2V to 36V (Single) or ±1V to ±18V (Dual) | | **Current Consumption** | 0.8mA (Typical) | | **Input Offset Voltage** | 5mV (Maximum) | | **Output Type** | Open Collector | | **Response Time** | 1.3µs | | **Operating Temperature** | -40°C to +85°C | --- ### ## Key Features 1. **Wide Voltage Range:** It can operate on a single supply ranging from 2V to 36V, making it compatible with both low-voltage logic (3.3V/5V) and industrial 24V systems. 2. **Open Collector Output:** The output requires a pull-up resistor. This allows the IC to interface with different logic levels (e.g., using a 5V supply for the IC but pulling the output to 3.3V). 3. **Low Input Bias Current:** Minimizes errors when used with high-impedance signal sources. 4. **Pin Compatibility:** It is a low-power equivalent to the industry-standard LM393 (single version) and is often pin-compatible with the LM311 in specific configurations. --- ### ## Pin Configuration (SOT-25) In a standard SOT-25 package, the pinout typically follows this structure: | Pin Number | Function | Description | | :--- | :--- | :--- | | 1 | OUT | Output (Open Collector) | | 2 | VCC | Positive Power Supply | | 3 | GND | Ground / Negative Supply | | 4 | IN+ | Non-Inverting Input | | 5 | IN- | Inverting Input | --- ### ## Typical Applications * **Voltage Limit Alarms:** Monitoring battery levels or power rails. * **Zero-Crossing Detectors:** Used in AC power phase control. * **Square Wave Generators:** Creating clock signals or PWM pulses. * **Industrial Sensors:** Interfacing analog sensors with digital microcontrollers. --- ### ## Example Circuit Concept To use this as a simple voltage threshold detector, you would set up a voltage divider on one input and the signal on the other. ```c // Concept: Output turns HIGH when Input exceeds Reference VCC (5V) --- [Pull-up Resistor] --- Pin 1 (OUT) Pin 2 (VCC) --- 5V Pin 3 (GND) --- Ground Pin 4 (IN+) --- Input Signal Pin 5 (IN-) --- V_Reference (e.g., 2.5V via divider) ```