24AA025-I/ST

Memory IC Overview

The Microchip Technology 24AA025-I/ST is a 2 Kbit (256 x 8) serial electrically erasable PROM featuring an I2C-compatible 2-wire interface. It operates on a single supply voltage ranging from 1.7V to 5.5V with typical standby current of 1 μA and active read current of 1 mA. The device supports clock frequencies up to 400 kHz, providing access times as fast as 900 ns at higher voltages. It includes a 16-byte page write buffer and self-timed erase/write cycles with a maximum duration of 5 ms. Designed for industrial applications, it functions within a temperature range of -40°C to +85°C and is housed in an 8-lead MSOP package.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using hardware address pins A0, A1, and A2 for expanded memory addressing.
• Features Schmitt trigger inputs and output slope control to suppress noise spikes and eliminate ground bounce during operation.
• Includes a VCC threshold detector circuit that disables internal erase/write logic if power drops below nominal levels.
• Provides high reliability with over one million erase/write cycles and data retention exceeding 200 years.

Memory IC Applications

• Industrial systems requiring non-volatile data storage
• Consumer electronics utilizing low-power microcontrollers
• Medical electronic devices needing reliable parameter logging

Memory IC Procurement Notes

Verify the specific suffix 'I/ST' corresponds to the Industrial temperature grade (-40°C to +85°C) and the 8-lead MSOP package type. Confirm that the application does not require hardware write protection, as this variant lacks the WP pin found in the 24AA024 model. Ensure the system design accounts for the open-drain nature of the SDA line by including appropriate pull-up resistors.

Memory IC Selection Notes

Select this component when a 2 Kbit EEPROM capacity is required with I2C connectivity. Choose the 24AA025 over the 24AA024 if hardware write protection via a dedicated pin is not needed. Consider the 24AA025UID series if unique identification numbers are necessary for device tracking or security purposes.

Memory IC Part Context

This part belongs to the 24AA024/24LC024/24AA025/24LC025 family of 2 Kbit Serial Electrically Erasable PROMs. While functionally similar to the 24LC025, the 24AA series supports a wider voltage range starting at 1.7V compared to the 2.5V minimum of the LC series. The 'I' designation indicates industrial temperature rating, and 'ST' specifies the surface-mount MSOP packaging.

Memory IC Replacement Considerations

The 24AA024-I/ST serves as a direct functional substitute if hardware write protection is required. The 24LC025-I/ST is compatible but requires a minimum supply voltage of 2.5V instead of 1.7V. Cross-referencing with the 24AA025UID variants is possible if unique ID features are desired.