MCP131T-195I/TT

Supervisors Overview

The MCP131T-195I/TT is a micropower voltage supervisor from Microchip Technology, designed to monitor supply voltages within the range of 1.853 V to 1.948 V. It features an active-low reset output with an internal pull-up resistor and operates on supply voltages between 1 V and 5.5 V. The device provides a typical reset delay time of 120 ms to ensure stable power conditions before asserting a reset signal. It is housed in a compact SOT-23-3 surface-mount package and supports industrial temperature operation from -40°C to +85°C.

Supervisors Feature Summary

• Provides precise monitoring for low-voltage applications with a specific trip point around 1.9 V
• Features an active-low open-drain reset output with an integrated internal pull-up resistor
• Includes a built-in reset delay timer to prevent false resets during power transitions
• Designed for ultra-low supply current consumption to extend battery life in portable devices

Supervisors Applications

• Brown-out protection for microcontrollers and digital signal processors
• Power management systems in hand-held instrumentation
• Voltage supervision in telephone handsets and other battery-powered operations
• Embedded control applications requiring reliable reset signals during power loss events

Supervisors Procurement Notes

Verify that the suffix 'TT' corresponds to the SOT-23-3 tape and reel packaging configuration as specified by Microchip. Confirm the industrial temperature grade (-40°C to +85°C) matches the design requirements, noting that the 1.95V variant is restricted to this range. Ensure the active-low open-drain output with internal pull-up aligns with the target circuit's input impedance specifications.

Supervisors Selection Notes

Select this component when a fixed 1.9 V threshold is required for brown-out detection in low-power embedded systems. The internal pull-up resistor simplifies board layout by eliminating external components typically needed for open-drain outputs. Consider the SOT-23-3 package for space-constrained designs where through-hole options like TO-92 are not feasible. Verify compatibility with the system's minimum operating voltage of 1 V.

Supervisors Part Context

This part belongs to the MCP13xx family of micropower voltage supervisors, which offers various trip points and output configurations. The MCP131 variant specifically includes an internal pull-up resistor on the reset pin, distinguishing it from the MCP121 series. The family targets cost-sensitive applications in consumer electronics and industrial controls, providing essential power management functions without complex external circuitry.

Supervisors Replacement Considerations

Direct substitutes include other MCP131 variants with different trip points or packages, such as MCP131-263I/TO for higher voltage monitoring. Cross-family replacements like the MCP121 series offer similar functionality but lack the internal pull-up resistor. Ensure any replacement maintains the same active-low output polarity and reset delay characteristics to preserve system stability.