24LC515-I/P

Memory IC Overview

The Microchip Technology 24LC515-I/P is a 64K x 8 (512 Kbit) Serial Electrically Erasable PROM. It operates on a single supply voltage ranging from 2.5V to 5.5V and supports maximum clock frequencies of 100 kHz at voltages between 1.7V and 2.5V, and 400 kHz for voltages between 2.5V and 5.5V. The device utilizes an I²C compatible 2-Wire serial interface and features Schmitt trigger inputs for noise suppression. It includes hardware write protection via the WP pin and offers data retention exceeding 200 years with over one million erase/write cycles.

Memory IC Feature Summary

• Supports cascading up to four devices on the same bus using configurable chip select inputs A0 and A1.
• Features a 64-byte page write buffer to optimize write operations across memory boundaries.
• Includes hardware write protection that inhibits all write cycles when the WP pin is tied to VCC.

Memory IC Applications

• Personal communications systems requiring non-volatile storage
• Data acquisition applications needing reliable parameter retention
• Industrial control systems utilizing I²C communication protocols

Memory IC Procurement Notes

Verify the specific ordering suffix matches the required package type, as the 'I' indicates industrial temperature range and '/P' denotes the PDIP-8 package. Confirm voltage requirements align with the 2.5V minimum specification for the 24LC series. Ensure the application design accounts for the non-configurable A2 pin requirement, which must be hard-wired to VCC for proper operation.

Memory IC Selection Notes

Select this component for designs requiring low-power CMOS technology with standby currents typically around 100 nA. Consider the 24FC515 variant if higher clock speeds up to 1 MHz are necessary within the 2.5V to 5.5V range. Verify that the system architecture accommodates the sequential read limitations restricted to 256K bit blocks without crossing internal address boundaries.

Memory IC Part Context

This part belongs to the 24AA515/24LC515/24FC515 family of 512K I²C CMOS Serial EEPROMs. While sharing identical memory organization and interface protocols, the 24LC515 is distinguished by its 2.5V minimum operating voltage compared to the 1.7V capability of the 24AA515. It shares the 400 kHz maximum clock frequency with the 24AA515 but differs from the high-speed 24FC515.

Memory IC Replacement Considerations

The 24LC512 serves as a lower capacity alternative within the same package and interface family. For applications requiring faster bus speeds, the 24FC515 provides equivalent functionality with increased clock compatibility. Cross-referencing should confirm voltage thresholds and physical pinout consistency before substitution.