S-8209AAV-T8T1U

Basic Information Overview

Category: Integrated Circuit (IC)

Use: Voltage Detector with Watchdog Timer

Characteristics: - Monitors the voltage level of a power supply and provides a reset signal when the voltage drops below a certain threshold. - Includes a watchdog timer that resets the system if it fails to receive a periodic signal within a specified time period. - Designed for use in various electronic devices, such as microcontrollers, microprocessors, and other digital systems.

Package: TSSOP-8

Essence: The S-8209AAV-T8T1U is an integrated circuit that combines a voltage detector and a watchdog timer. It ensures stable operation of electronic devices by monitoring the power supply voltage and resetting the system if necessary.

Packaging/Quantity: Available in tape and reel packaging with 3,000 units per reel.

Specifications

• Supply Voltage Range: 1.6V to 6.0V
• Detection Voltage Accuracy: ±2%
• Watchdog Timer Timeout Period: 1.6s (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The S-8209AAV-T8T1U has the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. RESET: Output reset signal
4. WDI: Watchdog timer input
5. MR: Manual reset input
6. VBAT: Backup power supply input
7. VOUT: Voltage output
8. NC: No connection

Functional Features

1. Voltage Monitoring: Monitors the power supply voltage and generates a reset signal when the voltage drops below the detection threshold.
2. Watchdog Timer: Resets the system if it fails to receive a periodic signal within the specified time period.
3. Manual Reset: Allows for manual resetting of the system using the MR pin.
4. Backup Power Supply Input: Provides a backup power supply to maintain operation during main power supply interruptions.

Advantages and Disadvantages

Advantages: - Integrated voltage detector and watchdog timer in a single IC. - Wide supply voltage range allows for versatile applications. - Accurate detection voltage with low tolerance. - Manual reset capability for system control. - Backup power supply input ensures uninterrupted operation.

Disadvantages: - Limited timeout period for the watchdog timer (1.6s). - Noisy power supply may affect voltage detection accuracy.

Working Principles

The S-8209AAV-T8T1U operates by continuously monitoring the power supply voltage. If the voltage drops below the detection threshold, it generates a reset signal on the RESET pin, which can be used to reset the system. Additionally, the integrated watchdog timer requires a periodic signal on the WDI pin. If this signal is not received within the specified timeout period, the watchdog timer will also generate a reset signal.

Detailed Application Field Plans

The S-8209AAV-T8T1U is widely used in various electronic devices that require stable operation and system reset capabilities. Some application fields include:

1. Microcontrollers and Microprocessors: Ensures reliable operation and resets the system in case of voltage fluctuations or software failures.
2. Digital Systems: Provides voltage monitoring and watchdog timer functionality for digital systems, preventing system lock-ups and ensuring proper operation.
3. Battery-Powered Devices: Monitors battery voltage and triggers a reset if the voltage drops below a certain level, protecting the device from unstable power supply conditions.

Detailed and Complete Alternative Models

1. S-8209AAV-T8T1R: Similar to S-8209AAV-T8T1U, but with a different package (SOT-23-5).
2. S-8209AAV-T8T1G: Similar to S-8209AAV-T8T1U, but with a different package (SSOP-B8).

These alternative models offer similar functionality and characteristics, providing options for different PCB layouts and design requirements.

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