CAT1640WI45

Supervisors Overview

The CAT1640WI-45-G is a CPU supervisory circuit manufactured by onsemi, designed to monitor system power integrity. It operates within a supply voltage range of 3 V to 5.5 V and features a fixed threshold voltage of 4.5 V for undervoltage detection. The device provides an active low, open-drain reset output with a guaranteed reset delay time of 270 ms. It supports manual reset functionality and lacks a watchdog timer or battery backup switch. The component is housed in an SOIC-Wide-8 surface-mount package and functions at a maximum operating temperature of +85 °C.

Supervisors Feature Summary

• Integrates precision voltage monitoring with integrated 64K EEPROM memory for microcontroller systems
• Provides active low open-drain reset signal triggered by undervoltage conditions
• Supports manual reset input for system initialization control

Supervisors Applications

• CPU power supply supervision in embedded systems
• Microcontroller-based industrial control units
• Memory-backed system reset circuits

Supervisors Procurement Notes

Verify the exact suffix (e.g., -G) as it denotes specific packaging or compliance attributes. Confirm current availability status as this part may be discontinued or subject to limited distribution channels. Ensure the selected variant matches the required thermal and electrical specifications for the target application environment.

Supervisors Selection Notes

Select this component when both voltage supervision and non-volatile data storage are required in a single package. Compare against the CAT1641 series if different memory capacities or interface options are needed. Verify that the 4.5 V threshold aligns with the specific logic levels of the monitored microcontroller.

Supervisors Part Context

This device belongs to the CAT1640 family of supervisory circuits which combine power management with serial EEPROM capabilities. It serves as a complete solution for systems requiring brown-out protection alongside persistent data retention, eliminating the need for separate supervisor and memory ICs in compact designs.

Supervisors Replacement Considerations

The CAT1641WI-42-G is a documented alternative within the same product family offering similar supervisory functions.