X5045S8I-2.7AC7975

Supervisors Overview

The X5045S8I-2.7AC7975 is a CPU supervisory circuit integrating power-on reset, voltage monitoring, and a watchdog timer with 4K-bit SPI EEPROM. It operates within a supply voltage range of 2.62V to 5.5V, featuring a fixed threshold of 2.62V. The device includes a selectable timeout watchdog timer with a minimum delay of 100ms and an active-high reset output. It utilizes an 8-SOIC surface-mount package and supports a 3.3MHz SPI clock rate for memory access.

Supervisors Feature Summary

• Integrates power-on reset control, supply voltage supervision, and a watchdog timer with 4K-bit serial EEPROM in a single package.
• Features a programmable low VCC detection threshold and a selectable timeout watchdog timer for system reliability.
• Includes block lock protection and inadvertent write protection mechanisms to safeguard critical data stored in the EEPROM array.

Supervisors Applications

• Communications equipment such as routers, hubs, and switches
• Industrial systems including process control and intelligent instrumentation
• Computer systems like desktop computers and network servers

Supervisors Procurement Notes

Verify component authenticity due to historical acquisition by Intersil and subsequent transition to Renesas Electronics. Confirm that the specific suffix corresponds to the intended voltage threshold and package variant. Check current lifecycle status as some variants may be obsolete or end-of-life. Ensure compatibility with existing SPI interface requirements and thermal specifications for the target application environment.

Supervisors Selection Notes

Select this component when a combined solution for system reset, voltage monitoring, and non-volatile data storage is required. The fixed 2.62V threshold suits applications requiring precise low-voltage detection. Consider the 8-SOIC package for surface-mount assembly constraints. Evaluate the 1M write cycle endurance and page write mode for frequent data logging needs compared to alternatives with different memory capacities or interfaces.

Supervisors Part Context

This part belongs to the X5045 series of CPU supervisors developed originally by Xicor, which was acquired by Intersil in 2004. The series combines standard supervisory functions with embedded EEPROM, reducing board space and system cost. The product line has since been integrated into Renesas Electronics' portfolio following further industry consolidations, maintaining compatibility with original specifications.

Supervisors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference tools suggest checking for equivalent X5045 variants from Renesas or Intersil with matching voltage thresholds and package types.