24LC256T-I/SM

Memory IC Overview

The Microchip Technology 24LC256T-I/SM is a 256-Kbit (32K x 8) Serial Electrically Erasable PROM (EEPROM) utilizing an I²C-compatible two-wire serial interface. It operates within a supply voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz for industrial temperature ranges (-40°C to +85°C). The device features a 64-byte page write buffer, hardware write protection via the WP pin, and high ESD protection exceeding 4000V. Packaged in an 8-lead SOIJ format, it offers data retention over 200 years and endurance of one million erase/write cycles.

Memory IC Feature Summary

• Supports bidirectional two-wire serial communication compatible with standard I²C protocols.
• Includes a 64-byte page write buffer to optimize data transfer efficiency.
• Features hardware write protection controlled by the dedicated WP pin.

Memory IC Applications

• Personal communications devices requiring non-volatile data storage
• Data acquisition systems needing reliable parameter retention
• Industrial control applications operating within specified voltage and temperature limits

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and tape-and-reel configuration. Confirm the industrial temperature grade matches system environmental requirements. Ensure the voltage supply aligns with the 2.5V minimum operational threshold defined for this device variant. Cross-reference the datasheet revision to confirm pinout consistency.

Memory IC Selection Notes

Select this component when a 256-Kbit capacity is required with I²C connectivity. The 2.5V minimum supply voltage distinguishes it from lower-voltage variants like the 24AA256. The SOIJ package is suitable for surface-mount assembly where specific footprint dimensions are mandated. Consider the 400 kHz maximum clock speed for bus timing constraints.

Memory IC Part Context

This part belongs to the 24XX256 family, which includes the 24AA256 and 24FC256 variants. While sharing identical memory architecture and interface protocols, the 24LC256 is specifically rated for a 2.5V to 5.5V supply range, unlike the 1.7V capable 24AA256 or the 1 MHz capable 24FC256. All variants utilize the same functional block diagram and addressing schemes.

Memory IC Replacement Considerations

The 24LC256-I/SN serves as a direct package alternative using the SOIC-8 form factor. For applications requiring higher clock speeds, the 24FC256 series is compatible but requires verification of voltage thresholds. The 24AA256 offers broader voltage compatibility but may require level shifting if the system strictly adheres to the 2.5V minimum.