The **TS3704MPT** (often associated with the TS3704 family by STMicroelectronics) is a low-power, micropower quad CMOS voltage comparator. It is designed to operate with a single or dual power supply and is known for its extremely low current consumption. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the TS3704 series: | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Supply Voltage ($V_{CC}$)** | 2.7 to 16 | V | | **Supply Current (per comparator)** | 7 | $\mu$A | | **Response Time** | 1.5 | $\mu$s | | **Output Type** | Push-Pull | - | | **Operating Temperature** | -40 to +125 | °C | | **Input Offset Voltage** | 5 (max) | mV | --- ### 2. Electronic Architecture & Components The TS3704 contains four independent voltage comparators on a single monolithic chip. Below are the functional details: #### A. CMOS Technology Unlike older bipolar comparators (like the LM339), the TS3704 uses **CMOS (Complementary Metal-Oxide-Semiconductor)** technology. - **High Input Impedance:** This results in extremely low input bias currents ($pA$ range), making it ideal for high-impedance sensors. - **Rail-to-Rail Inputs:** The common-mode input voltage range includes the negative rail (ground). #### B. Push-Pull Output Stage The "MPT" or "PT" variants typically feature a **Push-Pull** output stage. - **No Pull-up Resistor:** Unlike open-collector comparators, this device can drive the output high or low directly. - **Speed:** This design allows for faster transitions and simplifies the interface with CMOS/TTL logic circuits. #### C. Micropower Design The internal biasing is optimized for low power. It consumes roughly **1/20th** of the power of a standard comparator, making it suitable for battery-powered handheld devices. --- ### 3. Pinout Configuration The TS3704MPT is usually housed in a **TSSOP14** package. The typical pin mapping is as follows: | Pin Number | Function | Description | | :--- | :--- | :--- | | 1, 2, 13, 14 | Outputs 1-4 | The result of the comparison for each unit | | 3 | $V_{CC}$ | Positive Power Supply | | 4, 6, 8, 10 | Inverting Inputs | Negative inputs for comparators 1-4 | | 5, 7, 9, 11 | Non-Inverting Inputs | Positive inputs for comparators 1-4 | | 12 | GND | Ground / Negative Supply | --- ### 4. Typical Applications * **Battery Monitoring:** Used in "low battery" detection circuits due to low idle current. * **Signal Conditioning:** Converting analog sensor signals into digital pulses. * **RC Oscillators:** Creating low-frequency clock signals with minimal power draw. * **Interface Circuits:** Bridging different logic levels in mixed-voltage systems. ---