## MIC2754-RBM5: Electronic Parts and Specifications The **MIC2754-RBM5** is a high-performance, precision voltage supervisor manufactured by Microchip Technology (formerly Micrel). It is specifically designed to monitor power supplies in digital systems and provide a reset signal when the voltage drops below a specific threshold. ### Core Functionality The device monitors a single supply voltage. If the monitored voltage falls below the factory-programmed threshold, the reset output transitions to its active state. The reset remains active for a fixed timeout period after the supply voltage rises back above the threshold. --- ### Key Technical Specifications | Parameter | Specification | |:---|:---| | **Threshold Voltage ($V_{TH}$)** | 2.63V (Typical) | | **Output Type** | Open-Drain, Active-Low | | **Reset Timeout Period** | 140ms to 280ms (Typical) | | **Supply Voltage Range** | 1.0V to 5.5V | | **Supply Current ($I_{DD}$)** | 10µA (Typical) | | **Operating Temperature** | -40°C to +85°C | | **Package Type** | SOT-23-5 | --- ### Internal Components & Architecture The MIC2754 integrates several critical electronic sub-circuits within its small package to ensure reliable operation: 1. **Precision Voltage Reference:** An internal bandgap reference used to compare the input voltage against a stable benchmark. 2. **Comparator with Hysteresis:** Prevents "chatter" or multiple resets if the power supply is noisy or hovering exactly at the threshold level. 3. **Delay Generator:** A timer circuit (usually based on an internal oscillator) that holds the reset signal for the duration of the timeout period to allow the system clock to stabilize. 4. **Output Driver:** An N-channel MOSFET for the open-drain output, allowing for "wired-OR" logic configurations. --- ### Pin Configuration (SOT-23-5) | Pin Number | Name | Description | |:---:|:---|:---| | 1 | **/RESET** | Active-low, open-drain output. | | 2 | **GND** | Ground reference. | | 3 | **NC/Manual Reset** | Depending on the specific variant, this may be No Connect or a Manual Reset input. | | 4 | **VCC** | Power supply input and monitored voltage. | | 5 | **NC** | No internal connection. | --- ### Application Circuit Example Because the output is **Open-Drain**, a pull-up resistor is required to interface with a microcontroller (MCU). ```c // Typical Connection Logic VCC (3.3V) ----+---- [MIC2754 VCC Pin] | [10k Pull-up Resistor] | +---- [MIC2754 /RESET Pin] ----> [MCU RESET Pin] ``` ---