Maxim Integrated's DS1815R-10: Robust EconoReset with Push-Pull Output

The DS1815R-10 is a versatile and reliable EconoReset device from the reputable semiconductor manufacturer Maxim Integrated. This component is designed to monitor system power supplies in digital systems; it provides a significant line of defense against power supply issues, ensuring that the microprocessor and other system components reset properly during a power failure or brownout condition.

The DS1815R-10 operates by monitoring the system's V<sub>CC. When V<sub>CC drops below the factory-set reset threshold, the reset output is driven active (low) for a minimum of 140ms after V<sub>CC rises above the reset threshold. This precise timing ensures that the system has adequate time to stabilize before the processor begins operation. Moreover, the reset output remains operational with V<sub>CC as low as 1.2V, which is essential for low-voltage applications.

One of the key features of the DS1815R-10 is its push-pull output configuration. Unlike open-drain outputs that require an external pull-up resistor, the push-pull output can drive the load directly. This design simplifies the circuit and can help reduce component count and overall system costs.

The device comes in a compact SOT-23 package, making it suitable for space-constrained applications. It is also characterized for operation over a wide temperature range of -40°C to +85°C, ensuring reliable performance in diverse operating environments.

Key specifications include:

• Factory-trimmed reset threshold suitable for a variety of applications
• Minimum 140ms reset pulse width
• Low supply current of 4µA (typical), making it ideal for portable battery-operated equipment
• Immunity to short V<sub>CC transients
• Push-pull output that eliminates the need for external resistors

Overall, the Maxim Integrated DS1815R-10 is an excellent choice for designers looking for a simple, yet effective power-on reset control solution. Its ease of use, combined with Maxim's reputation for quality, makes it a dependable component for ensuring the stable operation of digital systems.