25LC320A-E/SN

Overview

The Microchip Technology 25LC320A-E/SN is a 32-Kbit Serial Electrically Erasable PROM featuring an SPI-compatible interface. It utilizes a 4096 x 8-bit organization with a 32-byte page size and operates within a voltage range of 2.5V to 5.5V. The device supports a maximum clock frequency of 10 MHz at higher voltages, ensuring rapid data access. It is housed in an 8-lead SOIC package and designed for extended industrial applications, functioning reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Supports high-speed serial communication via a standard SPI bus with hold functionality for interrupt servicing
• Includes built-in hardware write protection mechanisms and programmable block protection levels
• Features self-timed erase and write cycles with automatic power-on data protection circuitry

Applications

• Microcontroller system data storage requiring non-volatile retention
• Industrial control environments demanding extended temperature operation
• Embedded systems utilizing SPI interfaces for configuration parameter logging

Procurement Notes

Verify the specific ordering suffix 'E' confirms the extended temperature grade (-40°C to +125°C) and the 'SN' suffix indicates the 8-lead SOIC package. Confirm that the supply voltage requirements align with the 2.5V minimum threshold specified for the LC series. Ensure compatibility with the host microcontroller's SPI voltage levels before integration.

Selection Notes

Select this component when extended temperature performance is required alongside standard SPI connectivity. The 2.5V minimum operating voltage distinguishes it from lower-voltage AA variants. Consider the 32-byte page write capability for efficient data management. Verify that the 8-lead SOIC footprint matches the target PCB layout constraints.

Part Context

This part belongs to the 25LC320A family of 32-Kbit EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 25AA320A but differs in operating voltage specifications. The device is designed for general-purpose non-volatile memory applications where data integrity and long-term retention are critical factors.

Replacement Considerations

The 25LC320A-I/SN serves as a direct functional substitute if the industrial temperature range (-40°C to +85°C) suffices for the application. Other package options such as MSOP or TSSOP may be considered if form factor changes are permissible.