The SP706EN/TR is a supervisory circuit manufactured by Exar Corporation. This device is designed to monitor the power supply voltage in microprocessor and microcontroller systems and generate a reset signal when the voltage falls below a certain threshold. This prevents the system from operating with insufficient voltage, which can lead to data corruption or system instability.

Applications:

• Microprocessor-Based Systems: Ensuring proper reset functionality for microprocessors and microcontrollers.
• Embedded Systems: Providing reliable power-on reset and voltage monitoring.
• Data Acquisition Systems: Protecting data integrity in the event of power fluctuations.
• Industrial Control: Monitoring power supplies in industrial control applications.
• Portable Devices: Monitoring battery voltage to prevent operation at low power.

Features:

• Precision Voltage Monitoring: Monitors the supply voltage accurately.
• Power-On Reset: Generates a reset pulse during power-up.
• Manual Reset Input: Allows for external reset triggering.
• Active-Low Reset Output: Provides an active-low reset signal.
• Low Supply Current: Operates with minimal power consumption.
• Tape and Reel Packaging: Suitable for automated assembly.

Benefits:

• Prevents Data Corruption: Ensures data is not corrupted due to insufficient voltage.
• Enhances System Reliability: Improves the overall stability of the system.
• Simplifies Design: Reduces the need for external reset circuitry.
• Protects Microcontrollers: Prevents microcontrollers from operating with inadequate power.
• Increases System Uptime: Minimizes the risk of system failures due to power issues.

The SP706EN/TR operates over a wide supply voltage range, typically 4.5V to 5.5V. It includes a precise voltage reference and comparator to monitor the supply voltage. When the voltage drops below a pre-determined threshold, the device asserts an active-low reset signal. The reset signal remains asserted until the voltage rises above the threshold, plus a hysteresis margin. This hysteresis prevents oscillations around the threshold. The /TR suffix indicates that the device is supplied in tape and reel packaging, suitable for automated assembly processes. The SP706EN/TR is commonly available in an 8-pin SOIC package. The integrated manual reset input allows for external reset triggering for test or emergency situations. The low supply current makes it suitable for battery-powered applications.