24AA32AT-I/OT

Memory IC Overview

The Microchip Technology 24AA32AT-I/OT is a 32-Kbit Electrically Erasable PROM (EEPROM) organized as a single block of 4K x 8-bit memory. It features a two-wire serial interface compatible with the I2C protocol, supporting clock frequencies up to 400 kHz for VCC ≥ 2.5V and 100 kHz for VCC < 2.5V. The device operates on a single supply voltage ranging from 1.7V to 5.5V. 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 OT package and supports industrial temperature ranges.

Memory IC Feature Summary

• Supports bidirectional data transfer using a two-wire serial interface compatible with standard I2C protocols.
• Includes a 32-byte page write buffer to facilitate efficient sequential data storage operations.
• Features hardware write protection controlled by the WP pin to prevent unintended 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 that the specific ordering suffix 'I/OT' corresponds to the Industrial temperature range (-40°C to +85°C) and the 8-lead OT package type as defined in the official Microchip Device Selection Table. Confirm that the voltage operating range matches the application requirements, noting the frequency limitation below 2.5V. Ensure compatibility with the host controller's I2C pull-up resistor values for the desired clock speed.

Memory IC Selection Notes

Select this component when a 32-Kbit EEPROM with I2C interface is required for low-voltage applications down to 1.7V. It is suitable for designs needing hardware write protection and high endurance. Consider the 8-lead OT package constraints for PCB layout. Verify that the system voltage remains above 2.5V if 400 kHz operation is necessary; otherwise, 100 kHz mode is supported at lower voltages.

Memory IC Part Context

This device belongs to the 24XX32A family of 32-Kbit Serial EEPROMs manufactured by Microchip Technology. The family shares common electrical characteristics and functional descriptions but varies by voltage range, temperature grade, and physical package. The 24AA32A variant specifically supports operation down to 1.7V, distinguishing it from the 2.5V minimum 24LC32A counterpart.

Memory IC Replacement Considerations

The 24LC32A is a functional equivalent within the same family but requires a minimum supply voltage of 2.5V. Other packages such as MSOP, SOIC, TSSOP, DFN, and PDIP are available for the same electrical specifications. Substitution should account for package footprint differences and voltage threshold variations.