24LC32AF-E/SN

Memory IC Overview

The Microchip Technology 24LC32AF-E/SN is a 32 Kbit Electrically Erasable PROM organized as a single block of 4K x 8-bit memory. It features a 2-wire serial interface compatible with I2C™, supporting clock frequencies up to 400 kHz for VCC ≥ 2.5V. The device operates on a single supply voltage ranging from 2.5V to 5.5V and utilizes low-power CMOS technology with maximum active read current of 400 μA and standby current of 1 μA. It includes hardware write-protect capabilities for the upper quarter of the array and supports page writes of up to 32 bytes.

Memory IC Feature Summary

• Supports bidirectional 2-wire serial communication via SDA and SCL pins
• Includes hardware write-protect functionality for the upper quarter of the memory array
• Features Schmitt trigger inputs for noise suppression and output slope control
• Allows cascading of up to eight devices on the same bus using address pins

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing low-power operation
• Industrial control systems utilizing I2C bus protocols
• Automotive electronics operating within extended temperature ranges

Memory IC Procurement Notes

Verify that the ordering suffix correctly identifies the SN package variant (SOIC-8) and the E temperature grade (-40°C to +125°C). Confirm the specific revision level matches project requirements, as datasheet revisions may update electrical characteristics or pin descriptions. Ensure compatibility with existing PCB footprints for surface mount installation.

Memory IC Selection Notes

Select this component when an I2C-compatible EEPROM with automotive-grade temperature range is required. The 24LC32AF series is suitable for designs needing hardware write protection for critical data segments. Consider the SOIC-8 package dimensions for board space constraints. Verify power supply stability within the 2.5V to 5.5V range to ensure reliable operation across all specified conditions.

Memory IC Part Context

This part belongs to the 24AA32AF/24LC32AF family of 32 Kbit serial EEPROMs. The 'LC' designation indicates a minimum operating voltage of 2.5V, distinguishing it from the 'AA' variant which supports lower voltages down to 1.7V. The 'E' suffix denotes the extended industrial temperature range, while 'SN' specifies the surface-mount SOIC package type.

Memory IC Replacement Considerations

Direct substitutes include other 24LC32A variants with different packages such as 24LC32AFT-E/MS or 24LC32AF-E/PDIP, provided the pinout and electrical specifications remain identical. Cross-reference with 24AA32AF parts if lower voltage operation is acceptable.