## ADM6824TYRJZ-R7 Overview The **ADM6824TYRJZ-R7** is a high-reliability supervisory circuit (voltage detector) manufactured by **Analog Devices**. It is designed to monitor power supply levels and provide a reset signal to processors or microcontrollers during power-up, power-down, and brownout conditions. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Analog Devices | | **Function** | Supervisory Circuit (Reset Generator) | | **Threshold Voltage** | 3.08V (Standard for 3.3V systems) | | **Reset Timeout Period** | 140 ms (Minimum) | | **Output Type** | Push-Pull (Active Low) | | **Watchdog Timer** | 1.6 Seconds (Typical) | | **Operating Voltage** | 1.0V to 5.5V | | **Package / Case** | SOT-23-5 (Small Outline Transistor) | --- ### 2. Core Functional Parts The ADM6824 series combines three primary functions into a single integrated circuit: #### A. Voltage Monitoring (Vcc) The device continuously monitors the supply voltage. If the voltage drops below the fixed threshold (3.08V for the 'T' grade), the **RESET** output is triggered. This prevents the system processor from executing code in unstable voltage conditions. #### B. Watchdog Timer (WDI) The watchdog feature ensures the software is running correctly. The system must toggle the Watchdog Input (WDI) pin within 1.6 seconds. If the software "freezes" and fails to toggle the pin, the chip triggers a reset to reboot the system. #### C. Manual Reset (MR) The device includes a manual reset input. This allows a physical pushbutton or another logic signal to force a system reset, regardless of the voltage level or watchdog status. --- ### 3. Pin Configuration | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **RESET** | Output signal that goes low when Vcc is low or MR is pressed. | | 2 | **GND** | Ground reference. | | 3 | **MR** | Manual Reset Input (Active Low). | | 4 | **WDI** | Watchdog Input (Monitors microprocessor pulses). | | 5 | **Vcc** | Supply Voltage / Monitored Input. | --- ### 4. Typical Application Code Logic While this is a hardware component, the software interacting with it (specifically the WDI pin) usually looks like this: ```c // Example C code for a microcontroller interacting with WDI while (1) { Perform_System_Tasks(); // "Kick" or "Feed" the watchdog to prevent ADM6824 from resetting HAL_GPIO_TogglePin(GPIOA, WDI_PIN); Delay(100); // Must occur more frequently than 1.6 seconds } ```