25AA1024T-I/MF

Memory IC Overview

The Microchip Technology 25AA1024T-I/MF is a 1-Mbit (131,072-byte) serial EEPROM utilizing an SPI-compatible interface. It operates within a supply voltage range of 1.8V to 5.5V and supports clock frequencies up to 20 MHz depending on voltage levels. The device features a 256-byte page size with a maximum write cycle time of 6 ms. It includes sector-level write protection for 32K-byte sectors and offers high reliability with over 1 million erase/write cycles and data retention exceeding 200 years. The component is housed in an 8-lead DFN-S package and supports industrial temperature ranges.

Memory IC Feature Summary

• Supports byte and page-level write operations without requiring prior sector or page erase cycles.
• Includes hardware write protection via the WP pin and software protection through the STATUS register.
• Features a HOLD pin to suspend serial communication without resetting the sequence.
• Provides sector-level write protection allowing selective array security.

Memory IC Applications

• Data logging systems requiring non-volatile storage
• Configuration parameter storage in embedded controllers
• Industrial control applications needing reliable memory
• Automotive electronics requiring AEC-Q100 qualified components

Memory IC Procurement Notes

Verify the specific suffix 'MF' corresponds to the 8-lead DFN-S package type as documented in the manufacturer's selection table. Confirm that the 'I' designation matches the required industrial temperature range specifications for your application environment. Ensure compatibility with the 1.8V to 5.5V operating voltage range before integration.

Memory IC Selection Notes

Select this component when a 1-Mbit capacity is required with SPI interface compatibility. Consider the 256-byte page size for write efficiency and the availability of sector protection features. Verify that the 8-lead DFN-S package fits the PCB layout constraints. Check if the 1.8V minimum voltage requirement aligns with the system power rails.

Memory IC Part Context

This part belongs to the 25AA1024 family of 1-Mbit SPI Serial EEPROMs from Microchip Technology. The family shares core electrical characteristics and instruction sets but varies by package type and voltage range. The 'AA' prefix typically denotes the 1.8V compatible variant compared to the 'LC' series which may have different voltage thresholds.

Memory IC Replacement Considerations

The 25LC1024T-I/MF is a related variant within the same product family offering similar functionality. Verify voltage range compatibility as the LC series may differ from the AA series specifications. Cross-reference pinouts and instruction sets to ensure direct functional equivalence in existing designs.

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, page erase instructions are available if needed.

How is the HOLD function utilized during communication?

The HOLD pin allows the host to pause serial communication mid-sequence without resetting the address pointer. It must be held low while SCK is low to invoke the function.

What is the purpose of the WP pin?

The WP pin provides hardware write protection. When combined with the WPEN bit in the STATUS register, it can disable writes to the memory array or specifically the STATUS register.