### TS391L-AF5-R: Technical Overview The **TS391L-AF5-R** is a low-power, single voltage comparator designed for applications where space and power efficiency are critical. It is essentially a wide-voltage range comparator housed in a compact SOT-25 (or SOT-23-5) package. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Type** | Low Power Voltage Comparator | | **Number of Channels** | 1 (Single) | | **Supply Voltage Range** | 2V to 36V (Single) or ±1V to ±18V (Dual) | | **Supply Current** | 0.8mA (Typical) | | **Output Type** | Open Collector | | **Package Type** | SOT-25 / SOT-23-5 | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Functional Characteristics * **Open Collector Output:** The device features an open-collector output stage. This requires an external pull-up resistor to define the "High" logic level, allowing it to interface easily with various logic families (TTL, DTL, CMOS) regardless of the comparator's supply voltage. * **Wide Input Common-Mode Range:** The input common-mode voltage range includes ground, even when operated from a single power supply. * **Low Input Bias Current:** It minimizes the impact on high-impedance signal sources. * **Low Power Consumption:** Optimized for battery-powered or portable electronics. --- ### 3. Pin Configuration (SOT-25) | Pin Number | Symbol | Function | | :--- | :--- | :--- | | 1 | OUT | Output (Open Collector) | | 2 | VCC | Positive Supply Voltage | | 3 | GND | Ground (or Negative Supply) | | 4 | IN- | Inverting Input | | 5 | IN+ | Non-Inverting Input | --- ### 4. Typical Applications * **Limit Comparators:** Checking if a voltage is above or below a specific threshold. * **Pulse/Square Wave Generators:** Converting analog sine waves or irregular signals into clean digital pulses. * **Battery Monitors:** Monitoring low-voltage conditions in handheld devices. * **Interface Circuits:** Bridging different voltage levels between sensors and microcontrollers. --- ### 5. Ordering Information Deciphered The suffix **-AF5-R** usually breaks down as follows in the manufacturer's (UTC - Unisonic Technologies) nomenclature: * **AF5:** Refers to the SOT-25 package type. * **R:** Indicates "Tape and Reel" packaging for automated assembly. * **L:** Often denotes Lead-free / RoHS compliance.