SP691ACT-L/TR

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low Power Consumption - Wide Operating Voltage Range - Adjustable Reset Threshold - Active-High or Active-Low Reset Output - Open Drain Reset Output - Power-On Reset Delay Time: 100ms (typical) - Manual Reset Input - Watchdog Timer - Small Package Size

Package: SOT-23-5

Essence: The SP691ACT-L/TR is a voltage supervisor IC that monitors the power supply voltage of a system and provides a reset signal to the microcontroller or other digital devices when the voltage drops below a certain threshold.

Packaging/Quantity: The SP691ACT-L/TR is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.0V to 6.0V
• Reset Threshold Voltage Options: 2.93V, 3.08V, 4.38V, 4.63V, 4.88V, 5.13V, 5.38V, 5.63V
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The SP691ACT-L/TR has a total of 5 pins:

1. GND (Ground): Connected to the ground reference of the system.
2. MR (Manual Reset): An active-low input pin used to manually reset the device.
3. VCC (Supply Voltage): Connected to the positive power supply of the system.
4. RESET (Reset Output): Provides an active-low reset signal to the microcontroller or other digital devices.
5. WDI (Watchdog Input): Used to monitor the system's activity and prevent false resets.

Functional Features

• Voltage Monitoring: The SP691ACT-L/TR continuously monitors the supply voltage and generates a reset signal when it falls below the set threshold.
• Adjustable Reset Threshold: The reset threshold voltage can be adjusted to match the specific requirements of the system.
• Reset Timeout Period: If the supply voltage remains below the threshold for a specified period, the reset signal is activated.
• Manual Reset Input: Allows for manual resetting of the device by asserting a low signal on the MR pin.
• Watchdog Timer: Monitors the system's activity and resets the device if no activity is detected within a certain time frame.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide operating voltage range - Adjustable reset threshold - Small package size - Manual reset capability - Watchdog timer functionality

Disadvantages: - Limited number of available reset threshold options - Lack of additional advanced features

Working Principles

The SP691ACT-L/TR operates by comparing the supply voltage with the set threshold voltage. When the supply voltage drops below the threshold, the reset output is activated, signaling a reset condition to the microcontroller or other digital devices. The reset signal remains active until the supply voltage rises above the threshold or a timeout period elapses.

The device also includes a watchdog timer that monitors the system's activity. If no activity is detected within a specified time frame, the watchdog timer triggers a reset signal, ensuring the system's integrity.

Detailed Application Field Plans

The SP691ACT-L/TR is commonly used in various applications where reliable voltage monitoring and reset functionality are required. Some typical application fields include:

1. Microcontrollers and Digital Processors
2. Embedded Systems
3. Power Management Systems
4. Industrial Control Systems
5. Automotive Electronics
6. Battery-Powered Devices
7. Home Automation Systems

Detailed and Complete Alternative Models

1. SP691A: Similar voltage supervisor IC with adjustable reset threshold and watchdog timer functionality.
2. SP690: Voltage supervisor IC with fixed reset threshold options and manual reset input.
3. MAX691: Integrated circuit with adjustable reset threshold, watchdog timer, and power-fail detection features.

These alternative models offer similar functionality to the SP691ACT-L/TR and can be considered as alternatives based on specific application requirements.

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