MCP111-290E/TO

Supervisors Overview

The MCP111-290E/TO is a micropower voltage supervisor manufactured by Microchip Technology. It operates within a supply voltage range of 1V to 5.5V and features a typical reset threshold of 2.93V. The device draws a maximum steady-state supply current of 1.75µA. It provides an active-low, open-drain reset output with a typical delay timer of 120ms. Designed for through-hole mounting, it is housed in a TO-92 package and supports an extended operating temperature range from -40°C to +125°C.

Supervisors Feature Summary

• Ultra-low supply current consumption for battery-powered applications
• Precision voltage monitoring with fixed threshold options
• Active-low open-drain reset signal generation
• Extended industrial and automotive temperature capability

Supervisors Applications

• Microcontroller power-loss event detection
• Battery-operated embedded systems
• Portable electronic devices requiring low quiescent current
• Industrial control system supervision

Supervisors Procurement Notes

Verify the specific suffix 'TOG' or 'TO' against the manufacturer's datasheet to confirm pinout compatibility and lead-free status. Ensure the selected variant matches the required threshold voltage tolerance and package type for your PCB layout. Confirm AEC-Q100 qualification if automotive reliability standards are mandatory for the target application environment.

Supervisors Selection Notes

Select this component when a simple, low-cost voltage monitor is needed without manual reset or watchdog functionality. Compare the 2.93V threshold against the minimum acceptable logic high level of the downstream microcontroller. Consider the TO-92 package constraints versus surface-mount alternatives like SOT-23 if board space is limited. Verify that the 1.75µA current draw meets strict standby power budgets.

Supervisors Part Context

This part belongs to the MCP111 family of micropower voltage supervisors. The series offers various fixed threshold voltages including 1.90V, 2.32V, 2.63V, 2.93V, 3.08V, 4.38V, and 4.63V. Other variants in the family include MCP102, MCP103, MCP121, and MCP131, which differ primarily in output drive strength and internal pull-up configurations.

Supervisors Replacement Considerations

Compatible substitutes within the same family include MCP111-263E/TO (2.63V threshold) and MCP111-308E/TO (3.08V threshold). Cross-family replacements such as the MCP102 or MCP121 may be used if push-pull outputs or internal pull-ups are preferred, provided the package and electrical characteristics align with the design requirements.