MAX819LCUA

Supervisors Overview

The MAX819LCUA+ is a voltage supervisory circuit designed for +5V microprocessor systems. It operates within a supply voltage range of 0V to 5.5V and features a threshold voltage of 4.65V with an overvoltage threshold of 4.75V. The device provides an active-low, open-drain reset output with a reset delay time of 200ms. It includes manual reset functionality, battery backup switchover, and power-fail detection capabilities. The component consumes 11µA of operating current and is housed in an UMAX-8 surface-mount package.

Supervisors Feature Summary

• Provides active-low reset signal generation for monitoring single input voltage rails
• Includes manual reset input for system initialization control
• Features battery backup switchover for seamless transition between primary and secondary power sources
• Detects power failures via dedicated power-fail output pin

Supervisors Applications

• +5V microprocessor system power monitoring
• Battery-powered portable equipment supervision
• Backup battery switchover circuits
• Chip-enable gating in embedded systems

Supervisors Procurement Notes

Verify the specific suffix (+T or no suffix) against the manufacturer's datasheet to confirm packaging type, as availability varies by distributor. Confirm RoHS compliance status directly from the official documentation before integration. Check for obsolescence notices or lifecycle changes on the Analog Devices website. Ensure the UMAX-8 footprint matches the PCB design requirements. Validate thermal performance specifications against the application environment constraints.

Supervisors Selection Notes

Select this component when a low-current supervisor for +5V logic is required. Compare threshold voltages against other MAX819 variants if precise trip points are critical. Consider the UMAX-8 package size constraints versus alternative packages like SOIC-8 or PDIP-8. Verify that the open-drain output configuration aligns with the downstream logic interface requirements. Evaluate the need for watchdog functionality, which is absent in this specific variant.

Supervisors Part Context

Part of the MAX819 family of microprocessor supervisory circuits from Maxim Integrated. Designed specifically for +5V powered systems to simplify power-supply monitoring and battery control. Shares common characteristics with MAX817 and MAX818 series devices but offers distinct feature combinations such as the inclusion of power-fail detection without a watchdog timer.

Supervisors Replacement Considerations

Check for direct cross-references within the MAX819 family, such as MAX819LCSA+ (SOIC-8) or MAX819LCPA+ (PDIP-8), noting package differences. Verify functional equivalence regarding threshold voltages and reset delays. No public confirmed substitute part numbers are listed.