MCP1318T-45LE/OT

Supervisors Overview

The MCP1318T-45LE/OT is a single-channel power supply management circuit from Microchip Technology, designed for system supervision and reset generation. It operates within a supply voltage range of 1 V to 5.5 V and features an active low push-pull output with a manual reset input. The device includes a watchdog timer with a timeout interval of 1600 ms and a reset delay time of 200 ms. The voltage trip point is set at 4.5 V, ensuring precise monitoring of the power rail. Packaged in a lead-free SOT-23-5 (SC-74A) format, it supports surface-mount assembly.

Supervisors Feature Summary

• Provides active low push-pull reset output for reliable logic interfacing
• Integrates a watchdog timer with defined timeout and reset delay intervals
• Includes a manual reset input pin for external control capabilities

Supervisors Applications

• Embedded control systems requiring brown-out protection
• Microcontroller and ASIC power supply supervision
• Battery-powered handheld instrumentation

Supervisors Procurement Notes

Verify that the specific suffix /OT corresponds to the tape-and-reel packaging configuration intended for automated assembly processes. Confirm the active low output polarity matches the target microcontroller reset requirements. Ensure the 4.5 V trip point aligns with the monitored rail's minimum operating voltage. Check for AEC-Q100 qualification if automotive reliability standards are mandated by the design specification.

Supervisors Selection Notes

Select this component when a fixed 4.5 V threshold is required for voltage supervision. The SOT-23-5 package offers a compact footprint suitable for space-constrained designs. Consider the 1600 ms watchdog timeout duration against the processor's execution speed. Verify compatibility with the system's maximum supply voltage of 5.5 V. Evaluate the need for manual reset functionality versus software-only reset strategies.

Supervisors Part Context

This part belongs to the MCP131x family of system supervisors and reset circuits. The family provides various trip points and output types to support diverse embedded applications. These devices protect against brown-out conditions caused by supply voltage drops below safe operating levels. They are widely used in digital signal processors and custom chipsets.

Supervisors Replacement Considerations

MCP1318T-46LE/OT: Features a 4.6 V trip point instead of 4.5 V.