24LC64T-I/ST

Memory IC Overview

The Microchip Technology 24LC64T-I/ST is a 64-Kbit Electrically Erasable PROM organized as an 8K x 8-bit memory block. It operates on a single supply voltage ranging from 2.5V to 5.5V and features a two-wire serial interface compatible with I2C protocols. The device supports clock frequencies of up to 400 kHz at the specified operating voltage range, with a maximum access time of 900 ns. It includes a 32-byte page write buffer and hardware write protection via the WP pin. The component is housed in an 8-lead SOIC package and is rated for industrial temperature operation between -40°C and +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using three dedicated address pins (A0, A1, A2).
• Includes Schmitt trigger inputs on SDA and SCL lines to suppress noise spikes.
• Features output slope control designed to eliminate ground bounce during signal transitions.
• Provides hardware write protection by tying the WP pin to VCC.

Memory IC Applications

• Data logging systems requiring non-volatile storage.
• Configuration parameter storage in embedded controllers.
• Calibration data retention for sensor modules.

Memory IC Procurement Notes

Verify that the specific ordering suffix 'I' corresponds to the Industrial temperature grade (-40°C to +85°C) rather than Extended grade. Confirm the 'ST' suffix indicates the 8-lead SOIC package type. Ensure the datasheet version matches the required electrical characteristics for the 2.5V minimum supply voltage constraint.

Memory IC Selection Notes

Select this part when a 64-Kbit capacity is sufficient and a standard 8-pin surface mount footprint is required. It is suitable for designs where the 2.5V minimum supply voltage aligns with the system power rails. Consider alternative packages like MSOP or TSSOP if board space constraints differ from the SOIC dimensions.

Memory IC Part Context

This component belongs to the 24LC64 series within the broader 24XX64 family of I2C Serial EEPROMs. It shares functional similarities with the 24AA64 and 24FC64 variants but is distinguished by its specific 2.5V to 5.5V operating voltage range and 400 kHz maximum clock frequency capability.

Memory IC Replacement Considerations

The 24LC64-I/SN is a tube-packaged equivalent in the same SOIC-style form factor. Other package variations such as 24LC64-I/MS or 24LC64-I/MC offer identical functionality in different physical footprints.