## Electronic Overview: ADM6326-28ARTZ-R7 The **ADM6326-28ARTZ-R7** is a low-power, ultra-small microprocessor supervisory circuit designed to monitor power supplies in digital systems. It ensures that the processor remains in a reset state during power-up, power-down, and brownout conditions. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Reset Threshold Voltage** | 2.80V (Typical) | | **Supply Current** | 0.6 µA (Ultra-low power) | | **Output Configuration** | Push-Pull, Active-Low | | **Reset Timeout Period** | 100 ms (Minimum) | | **Operating Voltage Range** | 1.0V to 5.5V | | **Package Type** | SOT-23 (3-lead) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Functional Description The device functions by monitoring the $V_{CC}$ pin. If the voltage drops below the fixed threshold (2.8V for this specific model), the device triggers a reset signal. * **Power-Up:** The reset signal stays active for at least 100ms after $V_{CC}$ rises above the threshold to allow the system clock and power to stabilize. * **Brownout:** If the supply voltage dips below 2.8V, the reset output is immediately asserted. * **Push-Pull Output:** Unlike open-drain outputs, this part does not require an external pull-up resistor, saving board space and reducing component count. --- ### 3. Part Number Breakdown: ADM6326-28ARTZ-R7 Understanding the nomenclature helps identify specific features: | Segment | Meaning | | :--- | :--- | | **ADM6326** | Base Model Number (Microprocessor Supervisor) | | **-28** | Reset Threshold Voltage (2.8V) | | **ART** | SOT-23 Package Code | | **Z** | RoHS Compliant (Lead-Free) | | **-R7** | 7-inch Reel (3,000 units per reel) | --- ### 4. Typical Application Circuit The circuit is extremely simple to implement due to the 3-pin configuration. ```text [Vcc Source] ---------+--------- [Vcc Pin 3] | | [ADM6326-28ARTZ] | +--------- [RESET Pin 1] ----> To MCU Reset Input | [Ground] -------------+--------- [GND Pin 2] ``` --- ### 5. Common Use Cases * **Battery-Powered Equipment:** Due to the 0.6 µA current draw. * **Embedded Controllers:** Ensures reliable startup for microcontrollers like ARM, AVR, or PIC. * **Intelligent Instruments:** Protects data integrity during power fluctuations. * **Critical Timing Systems:** Provides a stable 100ms reset pulse to prevent "glitching" during initialization. ---