24LC32AF-I/SN

Memory IC Overview

The Microchip Technology 24LC32AF-I/SN is a 32 Kbit Electrically Erasable PROM organized as a single block of 4K x 8-bit memory. It features a 2-wire I²C compatible serial interface with a maximum clock frequency of 400 kHz for VCC ≥ 2.5V. The device operates on a single supply voltage ranging from 2.5V to 5.5V and is housed in an 8-lead SOIC package. It supports industrial temperature ranges from -40°C to +85°C, includes hardware write protection for the upper quarter of the array, and offers high endurance with over one million erase/write cycles.

Memory IC Feature Summary

• Supports bidirectional data transfer via a 2-wire serial interface compatible with standard I²C protocols.
• Includes hardware write-protect functionality that inhibits write operations for the upper quarter of the memory array when the WP pin is tied to VCC.
• Features Schmitt trigger inputs on SDA and SCL pins to suppress noise spikes and eliminate ground bounce through output slope control.

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 'I/SN' confirms the Industrial temperature grade (-40°C to +85°C) and SOIC-8 surface mount package. Ensure the design accounts for the 2.5V minimum operating voltage, which differs from the 1.7V requirement of the 24AA32AF variant. Confirm that the application circuit provides appropriate pull-up resistors for the open-drain SDA and SCL lines to maintain signal integrity at the target clock speed.

Memory IC Selection Notes

Select this component for designs requiring a 32 Kbit EEPROM with I²C connectivity and robust noise immunity. The 24LC32AF-I/SN is suitable for environments where the upper memory quarter requires permanent protection against accidental modification. Consider the 8-lead SOIC package dimensions for PCB layout constraints and ensure the system power supply remains stable within the 2.5V to 5.5V range to guarantee correct operation of the internal HV generator and logic circuits.

Memory IC Part Context

This part belongs to the 24AA32AF/24LC32AF family of 32 Kbit Serial EEPROMs manufactured by Microchip Technology. The 'LC' designation indicates a 2.5V minimum operating voltage, distinguishing it from the 'AA' series which supports lower voltages down to 1.7V. The 'I' suffix denotes the Industrial temperature rating, while 'SN' specifies the 8-lead Small Outline Integrated Circuit (SOIC) package type used for surface-mount assembly.

Memory IC Replacement Considerations

The 24LC32A is a related device but lacks the quarter-array hardware write-protect feature found in the AF series. Verify if the specific write-protection capability is required for the application before substituting.