25AA1024-I/WF16K

Memory IC Overview

The Microchip Technology 25AA1024-I/WF16K is a 1-Mbit (128K x 8) serial EEPROM utilizing an SPI-compatible interface. It operates within a voltage range of 1.8V to 5.5V and supports clock frequencies up to 20 MHz. The device features a 256-byte page size, 1 million erase/write cycle endurance, and over 200 years of data retention. It includes sector write protection, self-timed erase/write cycles, and deep power-down current consumption of 1 µA at 2.5V.

Memory IC Feature Summary

• Supports byte, page, sector, and chip erase operations via SPI interface
• Includes hardware write-protect pin and software block protection bits
• Features hold functionality to pause serial communication without resetting sequences
• Provides electronic signature identification and deep power-down mode

Memory IC Applications

• Microcontroller system configuration storage
• Calibration data and parameter logging
• Device identification and security key storage
• Industrial control system non-volatile memory

Memory IC Procurement Notes

Verify the specific suffix WF16K against official Microchip documentation to confirm wafer form factor availability. Ensure the industrial temperature grade (-40°C to +85°C) matches application requirements. Confirm RoHS compliance status through current datasheet revisions before finalizing procurement specifications.

Memory IC Selection Notes

Select this component for applications requiring high-density serial EEPROM with flexible erase capabilities beyond standard byte/page writes. The 256-byte page buffer reduces write latency compared to smaller page sizes. Consider the 20 MHz maximum clock speed for high-throughput data logging systems operating within the specified voltage and temperature ranges.

Memory IC Part Context

This part belongs to the 25AA1024 family of 1-Mbit SPI serial EEPROMs from Microchip Technology. It shares functional characteristics with other density variants in the series but offers higher capacity. The device is designed for industrial environments and complements lower-density EEPROM options in Microchip's portfolio.

Memory IC Replacement Considerations

Check for 25AA1024 variants with different package types such as PDIP or SOIJ if leaded mounting is required. Verify compatibility with 25LC1024 if voltage levels differ, noting that 25LC1024 typically requires 2.5V minimum operation.

Memory IC FAQ

Does the 25AA1024 require an erase cycle before writing?

No, the device supports auto-erase during write operations. Byte and page writes do not require prior erasure, though sector and chip erase instructions are available for bulk clearing.

How does the HOLD pin function during communication?

The HOLD pin allows the host to pause serial communication mid-sequence by pulling it low while SCK is low. This suspends data transfer without resetting the address pointer, allowing resumption upon releasing the pin.