ADM8321WAW30ARJZR7

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: Low-power voltage detector with watchdog timer
• Package: WLCSP (Wafer Level Chip Scale Package)
• Essence: Monitors power supply voltage and provides reset signal
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage Options: 2.93V, 3.08V, 3.15V, 3.30V, 4.38V, 4.63V, 4.75V, 4.88V
• Watchdog Timer Timeout Period: 1.6s, 3.1s, 6.3s, 12.5s, 25s, 50s, 100s, 200s
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. VDD: Power supply input
2. GND: Ground reference
3. RESET: Active-low reset output
4. MR: Master Reset input
5. WD: Watchdog Timer input
6. NC: No Connection

Functional Features

• Monitors the power supply voltage and asserts a reset signal when the voltage drops below the specified threshold.
• Includes a watchdog timer that requires periodic toggling of the WD pin to prevent a system lock-up.
• Provides a master reset input (MR) for external system reset control.

Advantages

• Low-power consumption, suitable for battery-powered applications.
• Wide supply voltage range allows compatibility with various systems.
• Small form factor package enables space-saving designs.
• Flexible options for reset threshold voltage and watchdog timer timeout period.

Disadvantages

• Limited number of available reset threshold voltage options.
• Watchdog timer timeout period options may not meet the requirements of all applications.
• Noisy power supply or voltage fluctuations may trigger false resets.

Working Principles

The ADM8321WAW30ARJZR7 is a low-power voltage detector with a watchdog timer. It continuously monitors the power supply voltage and compares it to the selected reset threshold voltage. When the voltage drops below the threshold, the device asserts an active-low reset signal on the RESET pin. The watchdog timer requires periodic toggling of the WD pin to prevent a system lock-up. If the watchdog timer is not refreshed within the specified timeout period, a reset signal is generated. The master reset input (MR) allows external control of the system reset.

Detailed Application Field Plans

The ADM8321WAW30ARJZR7 is commonly used in various applications where reliable power supply monitoring and system reset functionality are required. Some typical application fields include: - Battery-powered devices such as portable medical equipment, handheld instruments, and wireless sensors. - Industrial automation systems, where stable operation and fault recovery are critical. - Automotive electronics, ensuring proper functioning and protection against voltage fluctuations. - Consumer electronics, providing system integrity and preventing data corruption during power supply variations.

Detailed and Complete Alternative Models

• ADM6320: Voltage detector with adjustable reset threshold and watchdog timer.
• ADM708: Microprocessor supervisory circuit with adjustable reset threshold and watchdog timer.
• MAX809: Low-power microprocessor reset circuits with fixed reset threshold voltage options.
• TPS3808: Precision voltage supervisor with programmable reset threshold and watchdog timer.

Note: This is a non-exhaustive list of alternative models. Please refer to the respective datasheets for detailed specifications and compatibility with specific applications.

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