CAT1641LI-42-G

Supervisors Overview

The CAT1641LI-42-G is a voltage supervisory circuit manufactured by onsemi, designed for CPU systems with integrated 64K EEPROM support. It operates within a supply voltage range of 3 V to 5.5 V and features an undervoltage threshold between 4.25 V and 4.5 V. The device provides a manual reset function with a reset delay time of 270 ms. It utilizes an open drain or open collector output type and supports one monitored input channel. The component is housed in an 8-pin PDIP package and functions reliably across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrated support for external 64K EEPROM memory interfaces
• Manual reset capability with defined delay timing
• Open drain/open collector output configuration

Supervisors Applications

• CPU system power supervision
• Embedded systems requiring EEPROM integrity monitoring
• Industrial control units operating in extended temperature ranges

Supervisors Procurement Notes

Verify the specific manufacturer source, as this component may be associated with legacy AMI Semiconductor inventory now managed by onsemi. Confirm RoHS compliance status through official documentation before integration. Check current lifecycle status, as some variants are marked as obsolete or discontinued. Ensure the 8-pin DIP package matches your PCB footprint requirements. Validate that the 4.25V to 4.5V threshold aligns with your system's nominal voltage levels.

Supervisors Selection Notes

Select this component when a dedicated supervisor for CPU systems with EEPROM is required. The 8-pin PDIP package suits through-hole assembly processes. The 270 ms reset delay provides adequate stabilization time for most digital logic families. Consider the open-drain output compatibility with your microcontroller reset pins. Verify that the 3 V to 5.5 V operating range covers your system's minimum and maximum supply voltages under all load conditions.

Supervisors Part Context

This part belongs to the CAT1641 series of supervisory circuits, which are specialized for managing power sequences in microprocessor applications. The LI suffix typically indicates a leaded plastic dual in-line package variant. These devices integrate voltage monitoring with memory interface support, simplifying board design for systems relying on non-volatile storage.

Supervisors Replacement Considerations

Check for direct pin-compatible alternatives within the CAT1641 family, such as the CAT1641WI-42-G for surface mount needs. Verify if newer generations from onsemi offer improved thresholds or packaging options while maintaining functional equivalence.