The SP692AEN is a supervisory circuit produced by Exar Corporation. This device is used to monitor voltage levels within electronic systems and provide a reset signal to microprocessors or microcontrollers when the supply voltage drops below a predefined threshold. This ensures that the system initiates correctly and prevents potential data corruption or unstable operation arising from insufficient voltage.

Applications

• Embedded control systems
• Industrial automation equipment
• Telecommunications infrastructure
• Consumer electronics
• Medical devices

Features

• Accurate voltage monitoring
• Power-on reset functionality
• Low power consumption
• Active-low reset output signal
• Built-in immunity to transient voltage drops
• Compact packaging options

Benefits

• Safeguards against system failures due to voltage fluctuations
• Guarantees a consistent and reliable startup sequence
• Minimizes the chance of data loss or corruption
• Simplifies the design and implementation process
• Enhances overall system dependability
• Optimizes power efficiency for prolonged battery life

Additional Details

The SP692AEN is typically configured to monitor a 5V power supply rail, triggering a reset when the voltage falls below approximately 4.65V. The reset output remains active, holding the microprocessor in reset, until the voltage recovers above the threshold. A fixed reset delay ensures sufficient time for the power supply to stabilize before the microprocessor begins executing code. The device is designed to ignore brief negative voltage transients, preventing spurious resets. It features a low quiescent current, making it suitable for battery powered devices. It is available in different packages, including surface mount packages, to meet diverse design constraints. The reset output is an active low signal and goes low when the voltage falls below the threshold and returns high after the delay period once the voltage recovers. The SP692AEN increases the reliability and robustness of microprocessor based systems in a wide range of applications.