STM6822ZWY6F

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High efficiency, low power consumption
• Package: SOT-23-6
• Essence: Voltage Supervisor with Watchdog Timer
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timeout Periods: 1.6s, 3.2s, 6.4s, 12.8s, or adjustable
• Reset Threshold Voltage Options: 2.63V, 2.93V, 3.08V, 4.38V, or adjustable
• Quiescent Current: 1.5µA (typical)

Detailed Pin Configuration

The STM6822ZWY6F IC has a total of 6 pins arranged as follows:

1. GND: Ground connection
2. MR: Manual Reset input
3. VDD: Supply voltage input
4. RESET: Active-low reset output
5. WDI: Watchdog Timer input
6. NC: No Connection

Functional Features

• Monitors the supply voltage and asserts a reset signal when it falls below the specified threshold.
• Provides a watchdog timer function to detect system malfunctions and initiate a reset if necessary.
• Adjustable timeout periods and reset threshold voltages offer flexibility in different applications.
• Low quiescent current ensures minimal power consumption.

Advantages and Disadvantages

Advantages: - High efficiency in power management. - Wide supply voltage range allows compatibility with various systems. - Small package size enables space-saving designs. - Adjustable timeout periods and reset threshold voltages offer customization options.

Disadvantages: - Limited number of available timeout periods and reset threshold voltage options. - Noisy environments may affect the accuracy of voltage monitoring.

Working Principles

The STM6822ZWY6F is a voltage supervisor IC with an integrated watchdog timer. It continuously monitors the supply voltage and asserts a reset signal when it falls below the specified threshold voltage. This ensures that the system remains in a known state during power-up or voltage fluctuations.

Additionally, the watchdog timer function detects system malfunctions by periodically receiving a signal from the WDI pin. If the WDI signal is not received within the specified timeout period, the STM6822ZWY6F initiates a reset to prevent the system from getting stuck in an erroneous state.

Detailed Application Field Plans

The STM6822ZWY6F is widely used in various applications where reliable power management and system monitoring are crucial. Some potential application fields include:

1. Battery-powered devices: The low quiescent current and wide supply voltage range make it suitable for portable electronics, such as smartphones, tablets, and wearables.
2. Industrial automation: The voltage supervisor and watchdog timer functions ensure stable operation of control systems, preventing unexpected failures.
3. Automotive electronics: The IC can be utilized in automotive applications to monitor critical voltages and provide system reset capabilities.
4. Home appliances: By incorporating the STM6822ZWY6F, household devices can benefit from enhanced power management and protection against voltage fluctuations.

Detailed and Complete Alternative Models

1. STM6821ZWY6F: Similar to STM6822ZWY6F but with a different package (SOT-23-5) and one less pin.
2. MAX6822: Voltage supervisor IC with similar features, offered by Maxim Integrated.
3. TPS3839: Texas Instruments' voltage supervisor IC with adjustable reset threshold and watchdog timer.

These alternative models provide similar functionality to the STM6822ZWY6F and can be considered as alternatives based on specific requirements and availability.

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