### ADM6346-36ARTZ-R7: Technical Overview The **ADM6346-36ARTZ-R7** is a low-power, precision voltage detector/reset circuit designed by Analog Devices. It is primarily used to monitor power supply levels in microprocessor-based systems. --- ### Core Specifications and Features | Parameter | Specification | | :--- | :--- | | **Reset Threshold** | 3.60V (Nominal) | | **Output Stage** | Active-Low, Open-Drain | | **Supply Current** | 1.0 $\mu$A (Typical) | | **Input Voltage Range** | 1.0V to 5.5V | | **Reset Timeout Period** | 100 ms (Minimum) | | **Package / Case** | SOT-23-3 (3-Lead Small Outline Transistor) | | **Operating Temperature** | -40°C to +85°C | --- ### Functional Components #### 1. Voltage Comparator The device contains an internal reference and a highly accurate comparator. It constantly monitors the $V_{CC}$ pin against the internal 3.6V threshold. #### 2. Open-Drain Output Because the output is **Open-Drain**, it requires an external pull-up resistor to a voltage source (typically the same $V_{CC}$ or a different logic rail). This allows for "wired-OR" logic configurations where multiple reset sources can trigger the same reset line. #### 3. Power-On Reset (POR) The chip ensures that the microprocessor does not start executing code until the power supply has stabilized. Once $V_{CC}$ exceeds the 3.6V threshold, the device maintains the reset signal for a minimum of 100ms before releasing it. #### 4. Glitch Immunity The ADM6346 is designed to ignore fast transients or "glitches" on the $V_{CC}$ line, preventing nuisance resets that could disrupt system operation. --- ### Pin Configuration | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | **GND** | Ground reference. | | 2 | **$\overline{RESET}$** | Active-low output. Stays low when $V_{CC}$ is below threshold. | | 3 | **$V_{CC}$** | Power supply input and monitored voltage. | --- ### Typical Application Circuit ```text Vcc (3.6V+) | +-------[ Pull-up Resistor ]-------+ | | [ ADM6346 ] [ Microcontroller ] | Pin 3 (Vcc) | | | | Pin 2 (RESET) |------------------| RESET Input | | Pin 1 (GND) | | GND | | | GND GND ```