24LC64X-E/ST

Memory IC Overview

The Microchip Technology 24LC64X-E/ST is a 64-Kbit Electrically Erasable PROM (EEPROM) organized as an 8K x 8-bit memory block. It operates on a single supply voltage ranging from 2.5V to 5.5V and supports I2C compatible two-wire serial interfaces with clock frequencies up to 400 kHz. The device features 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 TSSOP package and is rated for extended industrial temperature ranges from -40°C to +125°C.

Memory IC Feature Summary

• Supports bidirectional data transfer using a standard two-wire I2C compatible serial interface.
• Includes a 32-byte page write buffer to optimize data writing efficiency.
• Features hardware write protection controlled by the WP pin to secure memory arrays.
• Incorporates Schmitt trigger inputs and output slope control for enhanced signal integrity.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required temperature grade and package type. Confirm the presence of the 'E' designation indicates the extended temperature range capability. Ensure compatibility with the host system's I2C bus voltage levels and pull-up resistor requirements before integration.

Memory IC Selection Notes

Select this component when a 64-Kbit EEPROM capacity is required within a compact surface-mount footprint. It is suitable for applications needing hardware-level write protection and reliable operation across wide industrial temperature variations. Consider the 32-byte page buffer size for optimizing write throughput in data-intensive scenarios.

Memory IC Part Context

This part belongs to the 24XX64 family of serial EEPROMs manufactured by Microchip Technology. The family shares common architectural features but varies in voltage ranges and clock speeds based on the prefix (AA, FC, LC). The 24LC64 variant specifically targets applications requiring a minimum operating voltage of 2.5V.

Memory IC Replacement Considerations

Direct replacements include other 24LC64 variants with different temperature grades or packages, such as 24LC64-I/ST. Cross-brand equivalents like STMicroelectronics M24C64 may require verification of pinout and command set compatibility.

Memory IC FAQ

How does the WP pin function?

The Write-Protect (WP) pin inhibits write operations when tied to VCC. When connected to VSS, write operations are enabled. Read operations remain unaffected regardless of the WP pin state.

What is the maximum page write size?

The device contains a 32-byte page write buffer, allowing up to 32 bytes to be written in a single sequence without generating a Stop condition between each byte.