UM823SS

Supervisors Overview

The UM823SS is a power supervisor manufactured by Union Semiconductor International Limited, designed for monitoring digital system power supplies. It features a threshold voltage (Vth) of 2.93V and operates within a temperature range of -40°C to 85°C (TA). The component is housed in an SC-74A or SOT-753 package, which corresponds to the SOT-23-5 form factor. This series provides cost-effective supervision with integrated watchdog and manual reset capabilities.

Supervisors Feature Summary

• Integrates power-on reset (POR) functionality with a watchdog timer
• Supports manual reset input for system control
• Features open-drain or open-collector output configuration

Supervisors Applications

• Digital system power supply monitoring
• Microprocessor reset circuits
• Embedded systems requiring watchdog protection

Supervisors Procurement Notes

Verify the manufacturer as Union Semiconductor International Limited when sourcing. Confirm the package type is SOT-23-5 (SC-74A/SOT-753) and the threshold voltage is 2.93V. Ensure the operating temperature range matches -40°C to 85°C. Cross-reference datasheets to confirm the presence of both watchdog and manual reset features before procurement.

Supervisors Selection Notes

Select this component for applications requiring a dedicated power supervisor with watchdog integration. The 2.93V threshold suits specific logic level monitoring needs. Consider the SOT-23-5 package for space-constrained designs. Verify compatibility with the system's manual reset requirements and ensure the industrial temperature range meets environmental specifications.

Supervisors Part Context

The UM823SS belongs to the UM823/824/825 series of system power supply supervisory circuits. These are positioned as cost-effective solutions for monitoring power rails in digital environments. The series shares common architectural features but varies in specific thresholds or pin configurations, with the UM823SS specifically offering POR, watchdog, and manual reset functions.

Supervisors Replacement Considerations

Consult official substitution lists from Union Semiconductor for verified equivalents. Generic microprocessor reset circuits may lack the specific watchdog or manual reset integration found in this part. Verify that any substitute maintains the 2.93V threshold and SOT-23-5 package compatibility.