STM1831L24WY6F Microprocessor Reset Circuit

The STM1831L24WY6F is a precision microprocessor (µP) reset circuit device developed by STMicroelectronics, designed to monitor the supply voltage of microprocessor (µP) systems. It ensures that the µP and its peripherals are reset properly during a power-up, power-down, or brown-out condition. This device is an essential component for any system that requires high reliability and robustness under various power supply conditions.

The STM1831L24WY6F operates by monitoring the Vcc line and keeping the reset output active low as long as the Vcc supply voltage remains below the reset threshold level. Once Vcc exceeds the reset threshold, the reset signal is kept in the active state for a predetermined period, allowing the system's power supply and processor to stabilize before the system start-up can commence. This built-in delay is crucial for preventing the system from starting up in an unstable state.

Key features of the STM1831L24WY6F include:

• Reset Threshold Voltage: Precisely set at 2.4V, suitable for low voltage applications.
• Low Supply Current: With its low operating current, this device is ideal for power-conscious designs.
• High Accuracy: Ensures reliable monitoring of the power supply, with a ±1.5% reset threshold accuracy at 25°C.
• Operating Temperature Range: Designed to function over a wide temperature range from -40°C to +85°C, making it versatile for various operating environments.
• Reset Delay Time: Offers a 140 ms minimum reset pulse width that provides ample time for the system to stabilize.
• Low Standby Current: Ideal for battery-powered applications due to its low (5 µA typical) standby current.
• Push-pull Active-low Reset Output: The device features a push-pull output driver, which provides a strong active-low reset signal without requiring an external pull-up resistor.
• Compact Package: Available in a small SOT-23 package, allowing for space-saving integration into system designs.

With its precise voltage monitoring and robust feature set, the STM1831L24WY6F is an excellent choice for managing the reset function in microprocessor systems, ensuring that your application maintains its performance and reliability under various conditions.