25AA010A-I/ST

Memory IC Overview

The Microchip Technology 25AA010A-I/ST is a 1 Kbit (128 x 8) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It operates with a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 10 MHz via a standard SPI-compatible serial bus. The device features self-timed erase and write cycles with a maximum duration of 5 ms. It includes block write protection capabilities, allowing users to protect none, one-quarter, one-half, or the entire memory array. The component is designed for industrial temperature ranges from -40°C to +85°C and is housed in an 8-lead TSSOP package.

Memory IC Feature Summary

• Supports sequential read operations and page write modes accommodating up to 16 bytes per cycle.
• Integrates hardware-based data protection mechanisms including power-on/off circuitry and a dedicated write-protect pin.
• Provides a Hold input function to suspend serial communication without resetting the active sequence.

Memory IC Applications

• Microcontroller system configuration storage
• Calibration parameter persistence
• Data logging buffer applications

Memory IC Procurement Notes

Verify that the ordering suffix corresponds to the specific package type required for the design. Confirm the temperature grade matches the operational environment specifications. Ensure compatibility with the host controller's SPI interface timing requirements before finalizing procurement decisions.

Memory IC Selection Notes

Select this component when a low-pin-count non-volatile memory solution is required for small data sets. The 1.8V minimum operating voltage makes it suitable for battery-powered systems. Consider the 16-byte page size limitation when designing write algorithms to ensure efficient data management across the memory array.

Memory IC Part Context

This device belongs to the 25XX010A series of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25LC010A variant, differing primarily in the minimum operating voltage specification. The series utilizes a standard 8-pin interface architecture compatible with common microcontroller SPI ports.

Memory IC Replacement Considerations

The 25LC010A serves as a direct functional substitute within the same family, though it requires a higher minimum supply voltage of 2.5V compared to the 1.8V requirement of the 25AA010A. Verify voltage headroom in the target application before substituting.

Memory IC FAQ

How does the HOLD pin affect ongoing serial communication?

Asserting the HOLD pin pauses transmission to the device while keeping the Chip Select signal active. This allows the host to service higher priority interrupts without losing the current serial sequence context.

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

If a page write operation attempts to cross a physical page boundary, the internal address counter wraps around to the beginning of the current page. This results in overwriting existing data at the start of the page rather than proceeding to the next page.