DS1831A+

Supervisors Overview

The DS1831A+ is a Multisupply MicroMonitor supervisory circuit manufactured by Analog Devices / Maxim Integrated. It monitors two independent voltage inputs with thresholds of 3.3 V and 5 V. The device features an active low, open-drain output and includes a manual reset function alongside a built-in watchdog timer. It operates within a supply voltage range up to 5.5 V and maintains an accuracy of 2.5%. The reset delay time is specified at 1.6 s, and the typical operating supply current is 100 uA. Overvoltage thresholds are set at 3.15 V and 4.75 V. The component is housed in a PDIP-16 package and supports through-hole mounting.

Supervisors Feature Summary

• Monitors dual power supply rails for system stability
• Integrates a watchdog timer for fault recovery
• Supports manual user-initiated reset operations

Supervisors Applications

• Embedded systems requiring multi-voltage supervision
• Industrial control units with redundant power sources
• Communication equipment monitoring critical logic levels

Supervisors Procurement Notes

Verify availability status as distribution channels may indicate limited stock or end-of-life conditions. Confirm RoHS compliance details and specific manufacturing lot dates against project requirements. Ensure the PDIP-16 through-hole package aligns with existing PCB footprints. Cross-reference the manufacturer part number DS1831A+ with authorized distributor catalogs to validate authenticity and sourcing channels before finalizing procurement plans.

Supervisors Selection Notes

Select this component when simultaneous monitoring of two distinct voltage rails is required without external comparator complexity. The inclusion of a watchdog timer simplifies design for applications needing automated recovery from software hangs. Verify that the 1.6 s reset delay meets system startup timing constraints. Ensure the 100 uA quiescent current fits within the overall power budget of the target application environment.

Supervisors Part Context

The DS1831A+ belongs to the DS1831 series of MicroMonitor circuits designed for reliable power management. It serves as a dedicated supervisory solution for detecting out-of-specification voltage conditions. The device integrates essential protection features into a compact form factor, reducing the need for discrete components in complex power architectures.

Supervisors Replacement Considerations

Check for direct pin-compatible alternatives within the same supervisory family if supply constraints exist. Verify that any substitute maintains the dual-input monitoring capability and watchdog functionality.