24LC32AF-I/P

Memory IC Overview

The Microchip Technology 24LC32AF-I/P 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 maximum clock frequencies of 400 kHz at VCC ≥ 2.5V and 100 kHz at lower voltages. The device operates on a single supply ranging from 2.5V to 5.5V. Key electrical characteristics include a maximum read current of 400 μA and standby current of 1 μA for the industrial grade. It offers hardware write-protect functionality for the upper quarter of the array (addresses C00h-FFFh) via the WP pin.

Memory IC Feature Summary

• Hardware write-protect capability allows locking the upper quarter of the memory array against accidental modification while maintaining full read access.
• Supports cascading up to eight devices on a single bus using functional address pins A0, A1, and A2 for expanded addressing.
• Includes Schmitt trigger inputs on data and clock lines to suppress noise spikes and eliminate ground bounce through 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 bus architectures

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature range. Confirm the voltage operation requirements align with the 2.5V minimum specification for the LC series. Ensure the design accounts for the hardware write-protect pin configuration if partial array protection is needed. Cross-reference the datasheet revision to confirm compatibility with existing system timing constraints.

Memory IC Selection Notes

Select this component when a 32 Kbit EEPROM with I2C compatibility is required in an 8-pin PDIP package. The Industrial temperature range (-40°C to +85°C) suits general-purpose electronics. Consider the 2.5V minimum operating voltage when designing power supplies. The page write buffer simplifies data logging tasks by allowing multiple bytes to be written in a single transaction.

Memory IC Part Context

This part belongs to the 24AA32AF/24LC32AF family of serial EEPROMs. The 'LC' designation indicates a 2.5V minimum operating voltage, distinguishing it from the 'AA' variant which supports 1.7V operation. The 'I' suffix denotes the Industrial temperature range, while 'P' specifies the 8-lead Plastic Dual In-line Package. This family provides a cost-effective solution for small data storage needs in embedded systems.

Memory IC Replacement Considerations

The 24LC32A-I/P serves as a direct replacement, differing primarily by the absence of the quarter-array hardware write-protect feature found in the AF variant. Verify that the application does not rely on the WP pin functionality before substituting.