## Technical Overview of the TS393D The **TS393D** is a widely used **Low-Power Dual Voltage Comparator**. It consists of two independent, high-precision voltage comparators designed to operate from a single power supply over a wide range of voltages. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Supply Voltage (Single)** | 2.7V to 16V | | **Supply Voltage (Dual)** | ±1.35V to ±8V | | **Supply Current** | ~200µA (very low power) | | **Input Offset Voltage** | 5mV (max) | | **Output Type** | Open Collector | | **Package Type** | SO-8 (Standard Surface Mount) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Core Functional Components The TS393D is built using **Micropower CMOS/Bipolar** technology, which allows it to balance speed and power consumption. The internal structure includes: * **Differential Input Stage:** High-impedance inputs that accept common-mode voltages even at ground level (0V) when operating from a single supply. * **Voltage Gain Stage:** Provides the necessary amplification to switch the output states sharply. * **Open Collector Output:** This is a critical feature. Unlike a standard push-pull output, the TS393D requires an external **pull-up resistor** to define the "High" logic level. This allows the IC to interface with different logic levels (e.g., 3.3V, 5V, or 12V) regardless of the supply voltage. --- ### 3. Pin Configuration (SO-8 Package) The device features 8 pins, split between two independent comparators: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | OUTPUT A | Output of Comparator A | | 2 | IN A - | Inverting Input of Comparator A | | 3 | IN A + | Non-inverting Input of Comparator A | | 4 | Vcc - / GND | Negative Supply or Ground | | 5 | IN B + | Non-inverting Input of Comparator B | | 6 | IN B - | Inverting Input of Comparator B | | 7 | OUTPUT B | Output of Comparator B | | 8 | Vcc + | Positive Supply Voltage | --- ### 4. Typical Application Example Because the output is an open collector, a common application is a **Zero-Crossing Detector** or a **Battery Level Monitor**. ```c // Logical Logic for TS393D Operation: If (V_in+) > (V_in-) { Output = High Impedance (Logic High via Pull-up Resistor) } else { Output = Ground (Logic Low) } ``` --- ### 5. Distinctive Features * **Low Power Consumption:** Ideal for battery-operated devices. * **Wide Common-Mode Range:** The input voltage can go as low as 0V, even with a single supply. * **Logic Compatibility:** Compatible with DTL, ECL, TTL, and CMOS logic systems.