UM813LS

Supervisors Overview

The UM813LS is a system power supply supervisory circuit from Union Semiconductor International Limited, designed to monitor digital system voltages. It integrates Power-On Reset (POR), Watchdog Timer, and Manual Reset (MR) functions into a single component. The device utilizes an 8-SOP package with push-pull or Totem Pole output configuration for a single channel. By consolidating these critical monitoring features, it reduces external component count and simplifies board layout while ensuring reliable processor initialization and fault recovery in embedded applications.

Supervisors Feature Summary

• Integrates Power-On Reset, Watchdog Timer, and Manual Reset functionalities within a single integrated circuit
• Provides active supervision of power supply rails to ensure correct logic states during startup and operation
• Features push-pull or Totem Pole output driver for robust signal transmission to host processors

Supervisors Applications

• Microprocessor system supervision
• Digital control circuits requiring watchdog protection
• Embedded systems with manual reset requirements

Supervisors Procurement Notes

Verify the specific suffix 'LS' against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure the 8-SOP package matches your PCB footprint design. Cross-reference the part number with authorized distributors to confirm current availability and authenticity before procurement.

Supervisors Selection Notes

Select this component when a combined solution for power-on reset, watchdog timer, and manual reset is required to minimize bill of materials. Consider the 8-SOP package size constraints and the need for push-pull output drive capability. Evaluate if the integrated functionality meets the timing requirements of the target microprocessor architecture.

Supervisors Part Context

This part belongs to the UM813xS series of cost-effective system supervisory circuits. It shares functional similarities with other models in the family but is distinguished by its specific integration of POR, Watchdog, and MR features. The series targets digital systems needing reliable power management without complex external circuitry.

Supervisors Replacement Considerations

Check for direct substitutes within the UM813xS family that may offer different package options or slight electrical variations. Verify pin-to-pin compatibility before replacing existing components to avoid redesigning the printed circuit board.