25AA1024-I/MF

Memory IC Overview

The Microchip Technology 25AA1024-I/MF is a 1-Mbit (131,072-byte) serial EEPROM utilizing an SPI-compatible interface. It supports a maximum clock frequency of 20 MHz and operates within a supply voltage range of 1.8V to 5.5V. The device features byte and page-level write operations with a 256-byte page size and a maximum write cycle time of 6 ms. It includes sector and chip erase capabilities, self-timed write cycles, and hardware write protection via the WP pin. The component is housed in an 8-lead DFN-S package and is rated for industrial temperature ranges.

Memory IC Feature Summary

• Supports high-speed SPI communication with a maximum clock rate of 20 MHz.
• Includes Page, Sector, and Chip erase functions typically associated with Flash products.
• Features built-in write protection mechanisms including power-on/off data protection and a dedicated Write-Protect pin.
• Offers low-power CMOS technology with deep power-down mode for minimal standby current consumption.

Memory IC Applications

• Data logging and storage in industrial control systems
• Configuration parameter storage in embedded microcontroller applications
• Calibration data retention in automotive electronic modules

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm that the voltage requirements align with the system's power supply rails, as the device supports a wide operating range. Ensure that the design accounts for the necessary SPI bus signals and hold pin functionality for reliable operation.

Memory IC Selection Notes

Select this component when a non-volatile memory solution requires both EEPROM reliability and Flash-like erase granularity. The 25AA1024 is suitable for applications needing frequent updates to small data blocks without erasing entire sectors. Consider the 8-lead DFN-S package for space-constrained PCB layouts requiring surface-mount assembly.

Memory IC Part Context

The 25AA1024 belongs to Microchip's 1-Mbit serial EEPROM family, designed for compatibility with standard SPI ports. It shares architectural similarities with other devices in the series but offers specific voltage and endurance characteristics tailored for industrial and automotive environments. The device integrates a status register for monitoring write operations and protection states.

Memory IC Replacement Considerations

Cross-reference with other 25AA1024 variants such as 25AA1024-I/P or 25AA1024-I/SM if different packaging options are required. Verify functional equivalence with 25LC1024 models, noting potential differences in minimum operating voltage specifications between the AA and LC series.

Memory IC FAQ

Does the 25AA1024 require an erase cycle before writing new data?

No, the device supports byte and page-level writes without requiring prior erase cycles. However, it does offer optional Page, Sector, and Chip erase instructions for clearing data.

How is the HOLD function utilized during SPI communication?

The HOLD pin allows the user to pause serial communication without resetting the sequence. This is useful for servicing higher priority interrupts while maintaining the current address pointer state.