24LC32AF-I/MS

Memory IC Overview

The Microchip Technology 24LC32AF-I/MS 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 and 100 kHz for lower voltages. The device operates on a single supply voltage ranging from 2.5V to 5.5V. It includes hardware write protection for the upper quarter of the array (addresses C00h-FFFh) via the WP pin. The component supports page writes of up to 32 bytes and offers data retention exceeding 200 years with over one million erase/write cycles.

Memory IC Feature Summary

• Hardware write protection capability for the upper quarter of the memory array
• Supports cascading up to eight devices on the same bus using functional address lines
• Includes Schmitt trigger inputs for noise suppression and output slope control

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the MSOP package type and Industrial temperature grade. Confirm the voltage range requirements match the 2.5V to 5.5V specification for the LC series. Ensure the design accounts for the hardware write-protect functionality if protecting the upper memory array is required. Check RoHS compliance status for environmental regulations.

Memory IC Selection Notes

Select this part when a 32 Kbit EEPROM with I²C interface is needed in an MSOP package. The 24LC32AF variant specifically requires a minimum operating voltage of 2.5V, distinguishing it from the 24AA32AF which supports 1.7V. Consider the hardware write-protect feature for the upper array if application security against accidental writes is necessary. Verify compatibility with the system's I²C bus speed limits.

Memory IC Part Context

This component belongs to the 24AA32AF/24LC32AF family of 32 Kbit Serial EEPROMs. The 'LC' designation indicates operation down to 2.5V, whereas 'AA' variants support 1.7V. The 'I' suffix denotes the Industrial temperature range (-40°C to +85°C). The 'MS' suffix identifies the 8-lead MSOP surface mount package. These devices share common electrical characteristics and bus protocols within the family.

Memory IC Replacement Considerations

The 24AA32AF-I/MS is a direct functional substitute with identical pinout and protocol, differing only in the minimum operating voltage (1.7V vs 2.5V). Other 32 Kbit I²C EEPROMs may require level shifting or voltage adjustment.