25AA010A-I/MS

Memory IC Overview

The Microchip Technology 25AA010A-I/MS is a 1 Kbit (128 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It interfaces via a standard SPI-compatible serial bus with a maximum clock frequency of 10 MHz. The device operates on a supply voltage range of 1.8V to 5.5V and supports industrial temperature ranges from -40°C to +85°C. It features self-timed erase and write cycles with a maximum duration of 5 ms, sequential read capabilities, and up to 16-byte page write modes.

Memory IC Feature Summary

• Supports block write protection allowing configuration to protect none, one-quarter, one-half, or the entire memory array.
• Includes built-in power-on/off data protection circuitry and a dedicated hardware write-protect pin for enhanced security.
• Features a hold input that suspends serial communication without resetting the sequence, enabling host interrupt servicing.

Memory IC Applications

• Configuration storage in microcontroller-based systems
• Calibration parameter persistence
• Data logging for low-frequency events

Memory IC Procurement Notes

Verify the specific suffix 'I/MS' corresponds to the Industrial temperature grade (-40°C to +85°C) and the 8-lead MSOP package type. Confirm RoHS compliance status matches current manufacturing standards. Ensure the source document explicitly lists this part number as active and available for procurement before finalizing orders.

Memory IC Selection Notes

Select this component when a small, non-volatile storage capacity of 1 Kbit is required for SPI-based architectures. It is suitable for applications needing robust write protection mechanisms and operation across a wide voltage range starting at 1.8V. Consider the MSOP package constraints regarding board space and thermal dissipation requirements.

Memory IC Part Context

This device belongs to the 25XX010A family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25LC010A but differs in its minimum operating voltage specifications. The series is designed for low-power embedded applications requiring reliable data retention and high endurance characteristics.

Memory IC Replacement Considerations

The 25LC010A is a direct functional alternative within the same datasheet, though it requires a higher minimum supply voltage of 2.5V compared to the 1.8V minimum of the 25AA010A. Verify voltage compatibility before substitution.

Memory IC FAQ

How does the HOLD pin function during serial communication?

The HOLD pin allows the user to pause transmission to the device without resetting the serial sequence. Transitions on SI, SCK, and SO are ignored while held low, and communication resumes when the pin is brought high while SCK is low.

What happens if a page write crosses a physical page boundary?

If a page write operation attempts to cross a physical page boundary, the data wraps around to the beginning of the current page, overwriting existing data instead of writing to the next page.