ON Semiconductor MAX810SN293D3T1G Microprocessor Reset Circuit

The MAX810SN293D3T1G from ON Semiconductor is a highly reliable, compact microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant function in ensuring system integrity during power-up, operation, and power-down. This device is particularly well-suited for portable, battery-operated applications due to its low power consumption and small footprint.

This supervisory circuit asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, holding the connected microprocessor in a reset state until conditions stabilize. The reset output remains asserted for a period after VCC has risen above the reset threshold level, ensuring that the system has sufficient time to stabilize before the processor begins operation. This feature is crucial for preventing system errors that can arise from inadequate supply voltage during startup or operation.

The MAX810SN293D3T1G comes in a compact SOT-23 package, making it an excellent choice for space-constrained applications. It offers a fixed sense threshold voltage of 2.93V, tailored for 3V-powered systems. With its precision voltage monitoring capability and low supply current of just 20 µA, it is an energy-efficient solution that helps to extend battery life in portable devices.

Key features of the MAX810SN293D3T1G include:

• Reset threshold voltage: 2.93V
• Low supply current: 20 µA (typical)
• Reset timeout: 140 ms (minimum)
• Operating temperature range: -40°C to +105°C
• Package: SOT-23

This device is designed for a wide range of applications, including computers, controllers, intelligent instruments, portable/battery-powered equipment, and other microprocessor-based systems that require a reliable reset function. The MAX810SN293D3T1G ensures that all the connected digital components start in a known state, thereby enhancing the overall reliability and performance of electronic systems.

ON Semiconductor's commitment to quality means that the MAX810SN293D3T1G is manufactured to the highest standards, ensuring that it meets the stringent requirements of modern electronic systems. Whether you are designing a new system or upgrading an existing one, this supervisory circuit is an essential component for maintaining system stability and performance.