DS1815R-5+T&R

Product Overview

Category: Electronic Component
Use: Power Management
Characteristics: High-performance voltage supervisor with watchdog timer
Package: T&R (Tape and Reel)
Essence: Ensures reliable power supply and system stability
Packaging/Quantity: 1000 units per reel

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Watchdog Timer Timeout Period: Adjustable from 1.6s to 640s
• Reset Threshold Voltage Options: 2.93V, 3.08V, 4.38V, or 4.63V
• Active-Low Reset Output
• Manual Reset Input
• Power-On Reset Delay Time: 150ms typical
• Low Quiescent Current: 10µA typical
• Small Package Size: 8-pin SOIC

Detailed Pin Configuration

The DS1815R-5+T&R has the following pin configuration:

1. GND (Ground)
2. MR (Manual Reset Input)
3. VCC (Supply Voltage)
4. RESET (Active-Low Reset Output)
5. GND (Ground)
6. GND (Ground)
7. GND (Ground)
8. VCC (Supply Voltage)

Functional Features

• Monitors the power supply voltage and asserts a reset signal if it falls below the specified threshold.
• Includes a watchdog timer that resets the system if it fails to receive a periodic input within the set timeout period.
• Provides a manual reset input for external system reset control.
• Offers a small package size, making it suitable for space-constrained applications.
• Low quiescent current ensures minimal power consumption.

Advantages and Disadvantages

Advantages: - Reliable power supply monitoring - Flexible reset threshold voltage options - Adjustable watchdog timer timeout period - Small package size for space-constrained applications - Low power consumption

Disadvantages: - Limited to a maximum supply voltage of 5.5V - Operating temperature range may not be suitable for extreme environments

Working Principles

The DS1815R-5+T&R operates by continuously monitoring the supply voltage. If the voltage falls below the set threshold, it asserts a reset signal to ensure a reliable power supply. Additionally, it includes a watchdog timer that requires a periodic input to prevent system lock-up. If the input is not received within the set timeout period, the DS1815R-5+T&R resets the system. The manual reset input allows for external control over the system reset.

Detailed Application Field Plans

The DS1815R-5+T&R finds application in various fields, including:

1. Embedded Systems: Provides power supply monitoring and system reset functionality in microcontroller-based systems.
2. Industrial Automation: Ensures stable operation of critical equipment by monitoring power supply integrity.
3. Automotive Electronics: Enhances the reliability of automotive electronic systems by detecting and resetting in case of power supply issues.
4. Medical Devices: Safeguards patient safety by monitoring power supply and preventing system failures.
5. Consumer Electronics: Improves the overall performance and stability of electronic devices by ensuring a reliable power supply.

Detailed and Complete Alternative Models

1. DS1815R-10+T&R: Similar to DS1815R-5+T&R but with a higher reset threshold voltage option (10.25V).
2. DS1815R-3.3+T&R: Similar to DS1815R-5+T&R but with a lower reset threshold voltage option (3.3V).
3. DS1815R-5+T&R-S: Enhanced version with additional features such as adjustable power-on reset delay time.

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