24LC64T-E/SM

Memory IC Overview

The Microchip Technology 24LC64T-E/SM is a 64-Kbit (8K x 8) serial EEPROM utilizing an I²C-compatible two-wire interface. It operates within a supply voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz. The device features a 32-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead SOIJ package and rated for extended industrial temperatures from -40°C to +125°C.

Memory IC Feature Summary

• Supports bidirectional data transfer using a standard two-wire serial bus protocol with up to eight devices on one bus.
• Includes a 32-byte page write buffer to optimize write throughput and reduce internal programming cycles.
• Features hardware write protection that inhibits write operations when the WP pin is tied to VCC.
• Incorporates Schmitt trigger inputs and output slope control to suppress noise spikes and eliminate ground bounce.

Memory IC Applications

• Non-volatile storage for configuration parameters in embedded systems
• Data logging applications requiring byte-level updates
• Industrial sensor calibration coefficient retention
• Consumer electronics user preference storage

Memory IC Procurement Notes

Verify the specific suffix 'E' confirms the extended temperature range (-40°C to +125°C) and 'SM' denotes the 8-lead Small Outline Integrated Circuit (SOIJ) package. Confirm the datasheet revision matches the required electrical characteristics for your operating voltage. Ensure the design accounts for the open-drain nature of the SDA line requiring external pull-up resistors.

Memory IC Selection Notes

Select this part for applications requiring non-volatile memory with low standby current and byte-addressable updates. The 24LC64 series is suitable where I²C compatibility is essential. Compare against the 24AA64 if operation below 2.5V is needed, or the 24FC64 if higher clock speeds are required. Verify that the 8-lead SOIJ package fits the PCB layout constraints.

Memory IC Part Context

This component belongs to the Microchip 24XX64 family of 64-Kbit serial EEPROMs. The family includes variants like the 24AA64 and 24FC64 which differ primarily in minimum operating voltage and maximum clock frequency. All share the same logical organization and I²C interface but vary in electrical specifications and available packages.

Memory IC Replacement Considerations

Direct functional substitutes within the same package include other 24LC64 variants such as 24LC64-I/SM or 24LC64-E/SN, provided the temperature grade and package dimensions match. Cross-family replacements like 24AA64 require verification of the lower voltage threshold compatibility.