24AA32A/SN

Memory IC Overview

The Microchip Technology 24AA32A/SN is a 32-Kbit Electrically Erasable PROM organized as a single block of 4K x 8-bit memory. It features a two-wire serial interface compatible with I2C™ standards, supporting clock frequencies up to 400 kHz for VCC ≥ 2.5V and 100 kHz for lower voltages. The device operates on a single supply ranging from 1.7V to 5.5V, with typical standby current of 1 µA and active current of 1 mA. It includes a 32-byte page write buffer, hardware write-protect capability via the WP pin, and Schmitt trigger inputs for noise suppression. The component is housed in an 8-lead SOIC package and supports industrial temperature ranges.

Memory IC Feature Summary

• Supports bidirectional data transfer using a standard two-wire serial protocol with I2C compatibility.
• Includes a 32-byte page write buffer to optimize write operations and reduce cycle times.
• Features hardware write protection controlled by the WP pin to prevent accidental data modification.
• Incorporates Schmitt trigger inputs on SDA and SCL pins to enhance noise immunity.

Memory IC Applications

• Personal communications devices requiring low-power non-volatile storage
• Data acquisition systems needing reliable parameter retention
• Industrial control applications utilizing I2C bus architectures

Memory IC Procurement Notes

Verify the specific suffix 'SN' corresponds to the 8-lead SOIC package configuration required for your PCB layout. Confirm that the voltage supply range meets the minimum 1.7V requirement for full feature operation. Ensure the design accounts for the pull-up resistors necessary for the open-drain SDA and SCL lines. Check for any RoHS compliance documentation if environmental regulations apply to your manufacturing process.

Memory IC Selection Notes

Select this part when a 32-Kbit capacity is sufficient and I2C connectivity is preferred over SPI. The 24AA32A variant supports operation down to 1.7V, making it suitable for battery-powered or low-voltage logic systems compared to the 2.5V minimum of the 24LC32A. Consider the SOIC package dimensions against available board space. Verify that the 400 kHz speed meets the system's timing requirements.

Memory IC Part Context

This component belongs to the 24XX32A family of serial EEPROMs from Microchip Technology. The family shares identical electrical characteristics and functional descriptions, differing primarily in voltage ranges (AA vs LC) and physical packaging options. The 24AA32A specifically denotes the low-voltage version capable of operating below 2.5V. Other members include variants in MSOP, TSSOP, and DFN packages.

Memory IC Replacement Considerations

The 24LC32A/SN is a direct functional substitute within the same package, though it requires a minimum supply voltage of 2.5V instead of 1.7V. Other package variants such as 24AA32A/SM or 24AA32A/ST offer the same electrical performance but require different footprint layouts. Cross-referencing with other manufacturers requires verifying I2C compatibility and voltage thresholds.