Maxim Integrated DS1816R-10 MicroMonitor Chip

The DS1816R-10 is a compact, highly integrated micro-monitor chip designed by Maxim Integrated to provide system health monitoring functionality with minimal external components. This device is specifically engineered to monitor the power supply and microprocessor activity in digital systems, ensuring reliable operation and protection against system failures.

At the heart of the DS1816R-10 is a precision temperature-compensated voltage reference and comparator circuit that monitors the status of the power supply (VCC). The device asserts a reset signal whenever VCC falls below the factory-programmed threshold of 2.88V, ensuring that the microprocessor and other system components reset cleanly when power is inadequate.

In addition to power supply monitoring, the DS1816R-10 offers a watchdog timer feature. This timer requires periodic servicing by the system's microprocessor within a preset time window. If the microprocessor fails to service the watchdog (due to software lock-up or other failures), the DS1816R-10 will automatically generate a system reset, thereby providing a recovery mechanism for the host system.

The DS1816R-10 is available in a compact SOT-23 package, making it suitable for space-constrained applications. It has an active-low reset output, which remains asserted for a minimum of 150ms after VCC has risen above the reset threshold level, ensuring a proper system restart. The reset output is guaranteed valid down to VCC = 1.0V, which accommodates low-voltage operations.

Key features of the DS1816R-10 include:

• Factory-trimmed VCC reset threshold of 2.88V
• Watchdog timer with 1.6-second timeout (typical)
• Minimum 150ms reset pulse width
• Low power consumption
• Operates down to 1.0V VCC
• Compact SOT-23 package

With its combination of power supply monitoring, processor activity supervision, and compact form factor, the DS1816R-10 is an essential component for enhancing system reliability in a variety of digital applications, including embedded systems, computers, controllers, and intelligent instruments.

By integrating the DS1816R-10 into your design, you can ensure that your system maintains robust performance and provides a safeguard against potential system crashes or data corruption due to power supply anomalies or microprocessor malfunctions.