24LC64-I/MS

Memory IC Overview

The Microchip Technology 24LC64-I/MS is a 64-Kbit Electrically Erasable PROM (EEPROM) organized as an 8K x 8-bit memory block. It features a two-wire I2C compatible serial interface with a maximum clock frequency of 400 kHz for VCC between 2.5V and 5.5V. The device operates on a single supply voltage ranging from 2.5V to 5.5V, with a maximum active current of 3 mA and standby current of 1 µA. It includes a 32-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. The component is housed in an 8-lead MSOP package and supports industrial temperature ranges.

Memory IC Feature Summary

• Supports bidirectional data transfer using a standard two-wire serial bus protocol compatible with I2C.
• Includes a 32-byte page write buffer to facilitate efficient sequential data storage operations.
• Provides hardware write protection capability through the dedicated WP pin to prevent unintended data modification.
• Features Schmitt trigger inputs on SDA and SCL pins to suppress noise spikes and ensure signal integrity.

Memory IC Applications

• Industrial control systems requiring non-volatile data retention
• Power management circuits needing configuration storage
• Communication and network equipment utilizing serial interfaces

Memory IC Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm the specific revision level against the manufacturer's latest datasheet to ensure compatibility with system requirements. Check for any recent product change notifications regarding packaging or material composition updates before finalizing procurement decisions.

Memory IC Selection Notes

Select this component when a 64-Kbit EEPROM with I2C interface is required for low-power applications. Ensure the operating voltage range of 2.5V to 5.5V aligns with the system power supply. Consider the 8-MSOP package dimensions for PCB layout constraints. Verify that the 400 kHz clock speed meets the system communication timing requirements.

Memory IC Part Context

This part belongs to the 24LC64 series of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 24AA64 and 24FC64 devices but differs in minimum operating voltage and maximum clock frequency specifications. The series offers various package options including PDIP, SOIC, and DFN formats to accommodate different design needs.

Memory IC Replacement Considerations

Direct replacements include other 24LC64 variants with different packages such as 24LC64-I/SN or 24LC64-I/P. Cross-family substitutes like 24AA64 or 24FC64 may require voltage level and speed verification. Ensure any replacement maintains the same memory organization and interface compatibility.

Memory IC FAQ

How does the hardware write protection function work?

The WP pin allows users to write-protect the entire array. When tied to VCC, write operations are inhibited while read operations remain unaffected. When tied to VSS, write protection is disabled.

What is the maximum number of devices that can be connected to the same bus?

Up to eight 24LC64 devices can be connected to the same bus by utilizing the three chip address inputs (A0, A1, A2) to create unique device addresses.