24LC64F-E/P

Memory IC Overview

The Microchip Technology 24LC64F-E/P is a 64 Kbit Electrically Erasable PROM organized as an 8K x 8-bit memory block. It operates with a single supply voltage ranging from 2.5V to 5.5V and features a 2-wire serial interface compatible with the I²C™ protocol. The device supports clock frequencies of up to 400 kHz at voltages between 2.5V and 5.5V, and 100 kHz below 2.5V. It includes Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce. The component offers hardware write protection for the upper quarter of the array and utilizes low-power CMOS technology.

Memory IC Feature Summary

• Features a 2-wire serial interface compatible with the I²C™ bus protocol for efficient data transmission.
• Includes hardware write-protect functionality that secures the upper quarter of the memory array against unauthorized modifications.
• Supports cascading up to eight devices on the same bus through functional address inputs A0, A1, and A2.
• Incorporates Schmitt trigger inputs and output slope control to enhance signal integrity and suppress noise.

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing reliable parameter retention
• Embedded systems utilizing I²C bus architectures

Memory IC Procurement Notes

Verify the specific suffix 'E' indicates the Automotive temperature grade (-40°C to +125°C) rather than the standard Industrial grade. Confirm package type matches the PDIP requirement. Check datasheet revisions for any pinout or electrical characteristic updates before finalizing procurement specifications.

Memory IC Selection Notes

Select this part when automotive-grade temperature stability is required alongside standard I²C compatibility. Ensure the system voltage remains above 2.5V to utilize the maximum 400 kHz clock speed. Verify that the hardware write-protect feature aligns with the application's security requirements for the upper memory segment.

Memory IC Part Context

This component belongs to the 24AA64F/24LC64F/24FC64F family of 64 Kbit serial EEPROMs. While sharing core architecture, the 24LC64F variant is distinguished by its minimum operating voltage of 2.5V, unlike the 24AA64F which supports operation down to 1.7V. The 'E' suffix denotes extended temperature capabilities suitable for harsh environments.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: 24LC64-I/P (Industrial grade equivalent), 24AA64F-E/P (Lower voltage support).

Memory IC FAQ

How does the WP pin function regarding memory protection?

When tied to VCC, the WP pin inhibits write operations for the upper 1/4 of the array (addresses 1800h-1FFFh). Read operations remain unaffected regardless of the WP pin state.

What is the maximum number of devices supported on a single bus?

Up to eight devices can be connected to the same bus by utilizing the three chip select bits (A2, A1, A0) to create unique addresses.