24LC512-E/ST

Memory IC Overview

The Microchip Technology 24LC512-E/ST is a 512 Kbit (64K x 8) serial electrically erasable PROM featuring 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 utilizes an 8-lead SOIC package and is rated for extended industrial temperatures from -40°C to +125°C. Key electrical characteristics include a maximum access time of 900 ns, a page write buffer of 128 bytes, and a self-timed write cycle of 5 ms maximum.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using hardware address inputs A0, A1, and A2.
• Includes Schmitt trigger inputs with hysteresis for enhanced noise suppression and output slope control to eliminate ground bounce.
• Features a hardware write-protect pin that inhibits all write operations when tied to VCC while maintaining read functionality.
• Provides high reliability with over one million erase/write cycles and data retention exceeding 200 years.

Memory IC Applications

• Data acquisition systems requiring non-volatile storage
• Personal communications equipment
• Advanced low-power embedded applications

Memory IC Procurement Notes

Verify the specific suffix 'E' confirms the extended temperature rating (-40°C to +125°C) and 'ST' denotes the 8-lead SOIC package. Confirm the device meets RoHS compliance requirements. Ensure the application circuit provides adequate pull-up resistors for the SDA and SCL lines to support the required 400 kHz clock frequency.

Memory IC Selection Notes

Select this component for designs requiring robust data retention in high-temperature environments. The 24LC512 series is distinct from the 24AA512, which supports lower voltages down to 1.7V; ensure the system voltage remains above 2.5V. Consider the 128-byte page write capability for efficient bulk data transfers compared to byte-write operations.

Memory IC Part Context

This part belongs to the 24XX512 family of 512 Kbit Serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24AA512 and 24FC512, differentiated primarily by operating voltage ranges and maximum clock speeds. The 24LC512 specifically targets standard 2.5V to 5.5V applications requiring reliable non-volatile memory storage.

Memory IC FAQ

How does the Write-Protect (WP) pin function?

When the WP pin is tied to VCC, write operations are inhibited, but read operations remain unaffected. When tied to VSS, write protection is disabled, allowing normal write cycles.

What happens if a page write crosses a physical page boundary?

If a page write command attempts to write across a physical page boundary, the data wraps around to the beginning of the current page, overwriting previously stored data instead of proceeding to the next page.