25AA128-I/SN

Memory IC Overview

The Microchip Technology 25AA128-I/SN is a 128 Kbit (16,384 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 10 MHz at higher voltages. The device features a 64-byte page size, self-timed erase/write cycles with a maximum duration of 5 ms, and industrial temperature operation from -40°C to +85°C. It is housed in an 8-lead SOIC package.

Memory IC Feature Summary

• Supports high-speed SPI communication with a maximum clock frequency of 10 MHz.
• Includes hardware write protection via the WP pin and software block protection for array segments.
• Features built-in power-on/off data protection and a write enable latch to prevent inadvertent writes.
• Offers high reliability with 1,000,000 erase/write cycle endurance and over 200 years of data retention.

Memory IC Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Configuration parameter storage in industrial control devices
• Calibration data retention in sensor interfaces

Memory IC Procurement Notes

Verify that the specific part number suffix matches the required package type and temperature grade. Confirm that the voltage requirements align with the system design, as this variant supports low-voltage operation down to 1.8V. Ensure compliance with RoHS standards if applicable to the manufacturing process. Check for any recent Product Change Notifications regarding packaging or assembly updates.

Memory IC Selection Notes

Select this component when a 128 Kbit capacity is required with SPI interface compatibility. It is suitable for applications needing low standby current and robust write protection mechanisms. Consider the 8-lead SOIC package for surface-mount assembly. Verify that the operating voltage range of 1.8V to 5.5V meets the system's power supply specifications.

Memory IC Part Context

This device belongs to the 25XX128 family of serial EEPROMs from Microchip Technology. It shares functional similarities with the 25LC128 but differs in its minimum operating voltage, supporting 1.8V compared to the 25LC128's 2.5V minimum. Both variants offer identical memory organization and SPI interface capabilities.

Memory IC Replacement Considerations

The 25LC128-I/SN is a functionally similar alternative, though it requires a minimum supply voltage of 2.5V instead of 1.8V. Other members of the 25XX128 family may serve as substitutes depending on voltage and package requirements.