24LC65T/SM

Memory IC Overview

The Microchip Technology 24LC65T/SM is a 64Kbit (8K x 8) serial electrically erasable PROM featuring an I2C-compatible two-wire interface. It operates within a voltage range of 2.5V to 6.0V and supports clock frequencies up to 400 kHz in Fast Mode. The device includes a 64-byte input cache for efficient page writes, with a typical write cycle time of 2 ms per page. It is housed in an 8-pin surface-mount SOIJ package and is rated for industrial temperature ranges from -40°C to +85°C.

Memory IC Feature Summary

• Features a relocatable high-endurance memory block capable of 10 million erase/write cycles, while the remainder of the array supports 1 million cycles.
• Includes programmable security options allowing hardware write protection for up to fifteen contiguous 4K-bit blocks.
• Incorporates a 64-byte FIFO input cache that enables fast burst write loads directly into the EEPROM array.
• Provides noise suppression through Schmitt Trigger inputs on SCL and SDA lines for reliable operation at 400 kHz.

Memory IC Applications

• Advanced low-power applications such as personal communications devices
• Data acquisition systems requiring nonvolatile code storage
• Industrial control systems needing frequent data updates in high-endurance blocks

Memory IC Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'I' designation aligns with the required industrial temperature range of -40°C to +85°C. Ensure the system design accommodates the 2.5V minimum operating voltage specified for the 24LC65 series. Cross-reference the datasheet revision to confirm pinout compatibility with existing PCB layouts.

Memory IC Selection Notes

Select this component for designs requiring flexible memory endurance management between critical data and standard storage. The 24LC65 is suitable where multiple devices must share a single bus using configurable address pins A0-A2. Consider the 64-byte cache feature if the application demands high-speed sequential writing without waiting for individual page write cycles to complete.

Memory IC Part Context

This part belongs to the 24XX65 family of smart serial EEPROMs, which also includes the 24AA65 and 24C65 variants. These devices share identical functional architectures but differ in operating voltage ranges and temperature ratings. The 24LC65 specifically targets commercial and industrial environments with a 2.5V lower voltage limit compared to the automotive-grade 24C65.

Memory IC Replacement Considerations

Direct substitutes include other 24LC65 variants with different packaging or suffixes, such as 24LC65/P for DIP packages. For voltage flexibility, the 24AA65 offers a wider 1.8V to 6.0V range. Verify that any replacement maintains the same 8-pin SOIJ footprint and I2C protocol compatibility.