24LC64-E/SN

Memory IC Overview

The Microchip Technology 24LC64-E/SN 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 maximum access time of 900 ns, a page write buffer of 32 bytes, and a maximum write cycle time of 5 ms. It is housed in an 8-lead SOIC package and rated for extended industrial temperatures from -40°C to +125°C.

Memory IC Feature Summary

• Supports bidirectional data transfer via a standard two-wire serial bus protocol with hardware write protection capabilities.
• Includes a 32-byte page write buffer to optimize data throughput during memory programming operations.
• Features Schmitt trigger inputs on the SDA and SCL pins to provide enhanced noise suppression.

Memory IC Applications

• Data logging systems requiring non-volatile storage for sensor readings or timestamps
• Configuration storage for microcontroller-based embedded devices
• Calibration data retention in industrial instrumentation

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required temperature grade and package style. Confirm that the design accommodates the 2.5V minimum operating voltage, as this variant does not support operation below that threshold compared to other family members. Ensure the PCB layout accounts for the 8-SOIC footprint dimensions.

Memory IC Selection Notes

Select this component when an I2C interface is required for non-volatile storage in environments demanding extended temperature stability. It is suitable for applications needing hardware write protection and low standby current. Consider alternative packages if space constraints require smaller footprints than the SOIC offers.

Memory IC Part Context

This part belongs to the 24LC64 series of 64-Kbit serial EEPROMs manufactured by Microchip Technology. The 'E' suffix indicates the extended temperature range capability, while 'SN' denotes the 8-lead Small Outline Integrated Circuit package. It shares functional similarities with the 24AA64 and 24FC64 but differs in voltage ranges and clock speeds.

Memory IC Replacement Considerations

Direct replacements include other 24LC64 variants with different temperature grades or packages, such as 24LC64-I/SN for industrial temperature or 24LC64-E/MS for MSOP packaging. Cross-family substitutes like 24AA64 or 24FC64 may be used if voltage and speed requirements align.

Memory IC FAQ

How does the Write Protect (WP) pin function?

When the WP pin is tied to VCC, write operations are inhibited, protecting the entire memory array. When tied to VSS, write operations are enabled.

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

Up to eight devices can be connected to the same I2C bus by configuring the three chip address pins (A0, A1, A2) to unique logic levels.