24AA64-E/P

Memory IC Overview

The Microchip Technology 24AA64-E/P is a 64-Kbit Electrically Erasable PROM 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 at VCC ≥ 2.5V, and 100 kHz at VCC < 2.5V. The device operates on a single supply voltage ranging from 1.7V to 5.5V. It utilizes a PDIP-8 package for through-hole mounting and supports an extended temperature range from -40°C to +125°C.

Memory IC Feature Summary

• Low-voltage CMOS technology enabling operation down to 1.7V with minimal standby current consumption.
• Hardware write-protect capability via the WP pin to secure data integrity against unauthorized modifications.
• Integrated page write buffer allowing storage of up to 32 bytes before initiating an internal self-timed erase/write cycle.
• Schmitt trigger inputs designed to suppress noise spikes and eliminate ground bounce during signal transitions.

Memory IC Applications

• Data logging in industrial control systems requiring non-volatile storage under harsh environmental conditions.
• Configuration parameter storage in embedded microcontroller applications operating across wide voltage ranges.
• Calibration data retention for sensor interfaces where hardware write protection prevents accidental overwriting.

Memory IC Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Extended temperature range (-40°C to +125°C) and 'P' indicates the PDIP-8 through-hole package. Confirm the specific revision of datasheet DS20001189 matches the production lot requirements. Ensure compatibility with the host system's I2C bus voltage levels, noting the 100 kHz limitation below 2.5V.

Memory IC Selection Notes

Select this component when an extended industrial temperature range is mandatory alongside low-voltage operation starting at 1.7V. The PDIP-8 package is suitable for prototyping or applications requiring through-hole assembly. Compare against the 24LC64 variant if only industrial temperature (-40°C to +85°C) is needed, or the 24FC64 if higher speed up to 1 MHz is required at voltages above 2.5V.

Memory IC Part Context

This part belongs to the 24XX64 family of 64-Kbit I2C Serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24AA64 (standard), 24LC64 (lower voltage threshold), and 24FC64 (high speed). The 24AA64-E/P specifically denotes the extended temperature grade within the standard 400 kHz speed class, packaged in an 8-pin dual in-line format.

Memory IC Replacement Considerations

Direct functional substitutes within the same package and electrical specifications include the 24AA64-I/P for industrial temperature range applications. For high-speed requirements above 2.5V, the 24FC64-E/P is a compatible alternative. Cross-family replacements like the 24LC64-E/P are possible but require verification of the minimum operating voltage constraints.