DS1831B

Supervisors Overview

The DS1831B is a multi-supply supervisory circuit from the MicroMonitor series, designed for monitoring multiple power rails in complex systems. It features four independent voltage monitoring channels with fixed thresholds of 3.3V and 5V, alongside two adjustable threshold inputs. The device provides active-low reset outputs via open-drain or open-collector configurations. It supports configurable reset timeout delays of 10ms, 100ms, or 1000ms to accommodate various system startup requirements. Operating within a supply voltage range up to 5.5V, it functions reliably across an industrial temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Four-channel architecture enables simultaneous supervision of multiple distinct power supplies
• Configurable reset delay allows selection among 10ms, 100ms, and 1000ms timeouts
• Flexible input options include fixed 3.3V and 5V thresholds plus programmable voltage references

Supervisors Applications

• Multi-rail power distribution units requiring synchronized reset sequencing
• Embedded systems with mixed voltage domains needing centralized supervision
• Industrial control boards operating under extended temperature conditions

Supervisors Procurement Notes

Verify the specific suffix (e.g., BS vs B) to confirm package type and revision level. Confirm RoHS compliance status as indicated by the '+' designation if required. Ensure the selected variant matches the desired pinout and thermal characteristics for your PCB layout. Cross-reference the manufacturer's latest datasheet for any obsolescence notices or recommended design changes.

Supervisors Selection Notes

Select this component when designing systems with four distinct power rails that require unified reset management. The availability of both fixed and adjustable thresholds offers flexibility for non-standard voltage levels. Consider the open-drain output capability for compatibility with various logic families. Evaluate the reset delay options against your system's power-up ramp times to prevent false resets during transient states.

Supervisors Part Context

Part of the Maxim Integrated MicroMonitor family, the DS1831B specializes in multi-supply environments. It integrates multiple supervisor functions into a single IC, reducing board space compared to discrete solutions. The device simplifies design by handling timing and threshold comparisons internally, ensuring reliable operation in safety-critical applications where power integrity is paramount.

Supervisors Replacement Considerations

Check for direct pin-compatible alternatives within the same MicroMonitor family. Verify that substitute parts maintain identical threshold voltages and reset delay configurations. Ensure the replacement supports the same package dimensions and thermal performance specifications.