DS1811-5

Supervisors Overview

The DS1811-5 is a voltage monitor from the EconoReset series by Analog Devices Inc./Maxim Integrated. It features a single monitored input with an active low, open-drain output type. The threshold voltage is 4.35 V, and the reset delay time is 150 ms. The maximum power supply voltage is 5.5 V, with an accuracy of 2.5%. Operating current is 40 uA. It lacks manual reset, watchdog timer, battery backup switch, and chip enable signals. Power failure detection is supported. The device operates within a temperature range of -40°C to +85°C and is available in SOT-23-3 package.

Supervisors Feature Summary

• Provides simple reset or power-on reset functionality for monitoring a single voltage channel.
• Features an active low, open-drain output suitable for interfacing with various logic families.
• Includes power failure detection capability to ensure system integrity during voltage drops.
• Operates over an extended industrial temperature range without requiring external components.

Supervisors Applications

• Monitoring microprocessor supply voltages
• Ensuring reliable startup sequences in embedded systems
• Protecting circuits against under-voltage conditions

Supervisors Procurement Notes

Verify the exact suffix and packaging configuration when ordering, as availability may vary by region. Confirm RoHS compliance status through official documentation before integration. Check for obsolescence notices or lifecycle changes directly from the manufacturer. Ensure the selected package matches your PCB footprint requirements. Validate electrical parameters against your specific application needs using the latest datasheet.

Supervisors Selection Notes

Choose this component when a low-cost, single-channel supervisor with open-drain output is required. Consider the 4.35 V threshold and 150 ms delay for timing-sensitive designs. Verify that the 40 uA operating current meets power budget constraints. Ensure the SOT-23-3 package fits your assembly process. Confirm compatibility with the system's logic levels due to the open-drain nature of the output.

Supervisors Part Context

The DS1811-5 belongs to the DS1811R series of EconoReset supervisors. These devices are designed for cost-sensitive applications requiring basic voltage monitoring. The series typically offers fixed thresholds and minimal external component requirements. Analog Devices acquired Maxim Integrated, which originally developed this line. The part is commonly used in consumer electronics and industrial control systems where simplicity and reliability are prioritized.

Supervisors Replacement Considerations

Check for direct pin-to-pin replacements within the same family, such as other DS1811 variants with different thresholds. Verify if newer generations from Analog Devices offer improved accuracy or additional features. Ensure any substitute maintains the same output type and package dimensions. Cross-reference specifications carefully to avoid functional mismatches in critical timing applications.