The **UTL331G-AE5-R** is a specific integrated circuit manufactured by **Unisonic Technologies (UTC)**. It is primarily used as a low-voltage, low-power comparator. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. General Specifications The UTL331G is a single-channel, low-power comparator designed to operate across a wide voltage range. It is often used as a more modern, power-efficient alternative to the classic LM331 series in small-form-factor electronics. | Feature | Specification | | :--- | :--- | | **Component Type** | Single Voltage Comparator | | **Package Type** | SOT-23-5 (AE5) | | **Output Type** | Open-Collector | | **Supply Voltage (Single)** | 2.0V to 36V | | **Supply Voltage (Dual)** | ±1.0V to ±18V | | **Low Quiescent Current** | ~0.4mA (independent of supply voltage) | | **RoHS Status** | Halogen Free / Lead Free (R) | --- ### 2. Pin Configuration (SOT-23-5) The **AE5** suffix indicates the SOT-23-5 package. The standard pinout for this device is as follows: | Pin Number | Symbol | Description | | :--- | :--- | :--- | | 1 | **OUT** | Open-collector output | | 2 | **V-** | Negative supply (or Ground) | | 3 | **IN+** | Non-inverting input | | 4 | **IN-** | Inverting input | | 5 | **V+** | Positive supply voltage | --- ### 3. Key Electronic Characteristics * **Open-Collector Output:** Since the output is an open-collector, it requires a **pull-up resistor** to interface with logic levels (like 3.3V or 5V). This allows for "wired-AND" logic connections. * **Wide Input Common-Mode Range:** The input common-mode voltage range includes ground, even though the device is operated from a single supply voltage. * **Low Input Bias Current:** Typically around 25nA, which minimizes errors when used with high-impedance circuits. * **Low Saturation Voltage:** Typically 250mV at 4mA, ensuring a clear "Low" logic state. --- ### 4. Part Number Breakdown Understanding the suffix codes helps in sourcing the exact part: * **UTL331**: The base part number (Single Comparator). * **G**: Halogen-free and Lead-free material. * **AE5**: SOT-23-5 Package. * **R**: Tape and Reel packaging (industry standard for SMD). --- ### 5. Common Applications * **Limit Comparators:** Checking if a voltage is above or below a threshold. * **Level Translators:** Converting signals between different voltage levels (e.g., 12V to 5V). * **Oscillators:** Simple square wave generators. * **Battery Monitors:** Low-battery detection in portable devices.