25LC320/WF

Overview

The Microchip Technology 25LC320/WF is a 32 Kbit serial Electrically Erasable PROM featuring a 4096 x 8 bit organization. It operates via a Serial Peripheral Interface (SPI) compatible bus with clock frequencies up to 2 MHz for the Industrial grade variant. The device supports a supply voltage range of 2.5 V to 5.5 V and includes built-in write protection mechanisms, block write protection, and power-on data protection circuitry. It offers high reliability with endurance of 1 million erase/write cycles and data retention exceeding 200 years.

Feature Summary

• Supports SPI-compatible serial communication with hold functionality for interrupt servicing
• Includes hardware write-protect pin and software-configurable block protection levels
• Features self-timed erase and write cycles with automatic write enable latch management

Applications

• Microcontroller system data storage
• Configuration parameter retention
• Calibration value storage

Procurement Notes

Verify the specific suffix 'WF' against official Microchip documentation, as standard datasheets list PDIP, SOIC, and TSSOP packages. Confirm package type and temperature grade availability directly with the manufacturer or authorized distributors to ensure compatibility with design requirements.

Selection Notes

Select this component for applications requiring non-volatile memory accessible via standard SPI interfaces. Ensure the operating voltage falls within the 2.5 V to 5.5 V range. Consider the Industrial temperature grade (-40°C to +85°C) for general purpose environments. Verify that the 32-byte page size aligns with the application's write granularity needs.

Part Context

This part belongs to the 25XX320 family of 32 Kbit serial EEPROMs from Microchip Technology. It shares architectural similarities with the 25AA320 and 25C320 variants, differing primarily in supply voltage ranges and maximum clock speeds. The device utilizes CMOS technology for low-power operation.

Replacement Considerations

Direct replacements include other 25LC320 variants with different package suffixes such as /P, /SN, or /ST. Cross-family alternatives like the 25LC320A offer higher clock speeds but require verification of pinout and electrical characteristic compatibility.