24LC64FT-E/MS

Memory IC Overview

The Microchip Technology 24LC64FT-E/MS is a 64 Kbit (8K x 8) Electrically Erasable PROM featuring a 2-wire I2C compatible serial interface. It operates within a supply voltage range of 2.5V to 5.5V and supports maximum clock frequencies of 100 kHz at voltages below 2.5V and 400 kHz at voltages between 2.5V and 5.5V. The device utilizes low-power CMOS technology, ensuring standby currents are limited to 1 µA maximum in industrial temperature grades. It includes hardware write protection for the upper quarter of the memory array and offers data retention exceeding 200 years with over one million erase/write cycles guaranteed.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using functional address pins A0, A1, and A2.
• Includes Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce.
• Features a 32-byte page write buffer for efficient data transfer operations.
• Provides hardware write protection for the upper 1/4 of the memory array via the WP pin.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the required temperature grade and packaging format. Confirm that the 'T' designation indicates tape and reel packaging suitable for automated assembly processes. Ensure compatibility with the target system's I2C bus voltage levels and capacitance constraints before finalizing procurement orders.

Memory IC Selection Notes

Select this component when an automotive-grade temperature range (-40°C to +125°C) is required alongside standard I2C interface capabilities. Choose this part over variants with lower voltage support if the system design strictly maintains a minimum supply voltage of 2.5V. Consider the MSOP package dimensions for space-constrained surface mount designs.

Memory IC Part Context

This component belongs to the 24XX64F family of 64 Kbit serial EEPROMs manufactured by Microchip Technology. The family shares common architectural features including the 2-wire serial interface and page write capabilities. Variants within the family differ primarily in operating voltage ranges, maximum clock speeds, and specified temperature grades.

Memory IC Replacement Considerations

Direct substitutes include other 24LC64F variants from the same manufacturer family, such as those in SOIC or TSSOP packages, provided the temperature grade and interface timing requirements remain consistent with the original design specifications.

Memory IC FAQ

How does the Write-Protect (WP) pin function?

When tied to VCC, the WP pin inhibits write operations for the upper 1/4 of the array (addresses 1800h-1FFFh), while read operations remain unaffected. Tying it to VSS disables write protection for the entire array.

What is the behavior during a page write across a boundary?

If a page write command attempts to cross a physical page boundary, the data wraps around to the beginning of the current page rather than proceeding to the next page. Application software must prevent writes that cross these boundaries.