24LC32AT-I/SM

Memory IC Overview

The Microchip Technology 24LC32AT-I/SM is a 32-Kbit (4K x 8-bit) serial EEPROM utilizing an I2C-compatible two-wire interface. It operates within a voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz at VCC ≥ 2.5V, or 100 kHz for lower voltages. The device features a 32-byte page write buffer, hardware write protection via the WP pin, and industrial temperature operation from -40°C to +85°C. Key electrical characteristics include typical standby current of 1 µA and active current of 1 mA.

Memory IC Feature Summary

• Supports bidirectional data transfer via a standard two-wire serial bus with Schmitt trigger inputs for noise suppression.
• Includes a 32-byte page write buffer to optimize write throughput and reduce internal programming cycles.
• Provides hardware-based write protection through the WP pin to prevent accidental data modification.
• Features output slope control to minimize ground bounce during high-speed switching operations.

Memory IC Applications

• Data logging in industrial monitoring systems
• Configuration storage for embedded microcontrollers
• Calibration data retention in consumer electronics

Memory IC Procurement Notes

Verify that the ordering suffix 'I' confirms the Industrial temperature range (-40°C to +85°C) and 'SM' denotes the 8-lead SOIC package. Confirm the 'T' suffix indicates tape and reel packaging if required by assembly equipment. Ensure the voltage supply matches the 2.5V minimum requirement for the 24LC32A variant, distinct from the 1.7V capable 24AA32A.

Memory IC Selection Notes

Select this component when a 32-Kbit non-volatile memory solution is required with I2C connectivity. The 24LC32A variant is specified for applications where the supply voltage remains at or above 2.5V. For designs requiring operation below 2.5V, the 24AA32A series must be selected instead. Verify that the 8-lead SOIC package fits the PCB footprint constraints.

Memory IC Part Context

This part belongs to the 24XX32A family of 32-Kbit serial EEPROMs. The 'LC' designation specifically identifies the low-voltage CMOS technology optimized for 2.5V to 5.5V operation, distinguishing it from the 'AA' variant which supports down to 1.7V. The device shares functional architecture with other members of the 24-series but differs in voltage thresholds and specific package availability.

Memory IC Replacement Considerations

Direct substitutes include the 24AA32AT-I/SM, provided the system voltage does not drop below 2.5V. Other 24LC32A variants with different package codes (e.g., SN, MSOP) are functionally equivalent if pin compatibility allows. Cross-referencing with 24LC64A or 24LC128A requires software adaptation due to differing memory sizes and addressing structures.