24LC256T-I/MF

Memory IC Overview

The Microchip Technology 24LC256T-I/MF is a 256-Kbit (32K x 8) serial electrically erasable PROM utilizing 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 features a 64-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead TDFN package and rated for industrial temperatures from -40°C to +85°C.

Memory IC Feature Summary

• Supports bidirectional data transfer over a standard two-wire serial bus with up to eight devices on the same bus.
• Includes a 64-byte page write buffer to optimize write operations and reduce cycle times.
• Features hardware write protection that inhibits write cycles when the WP pin is tied high.
• Provides robust ESD protection exceeding 4000V and includes output slope control to eliminate ground bounce.

Memory IC Applications

• Personal communications equipment requiring non-volatile data storage
• Data acquisition systems needing reliable parameter retention
• Industrial control applications operating within specified temperature ranges

Memory IC Procurement Notes

Verify the specific suffix 'MF' corresponds to the 8-lead TDFN package configuration. Confirm the 'I' designation matches the required industrial temperature range of -40°C to +85°C. Ensure the voltage supply aligns with the 2.5V minimum requirement for the 24LC256 series rather than lower voltage variants.

Memory IC Selection Notes

Select this component for designs requiring low-power CMOS technology with standby currents as low as 1 µA. It is suitable for applications needing random and sequential reads up to the 256K boundary. Consider the 64-byte page write capability for efficient data logging where frequent small writes are not required.

Memory IC Part Context

This part belongs to the 24XX256 family, which also includes the 24AA256 and 24FC256. While sharing similar architecture, the 24LC256 specifically requires a minimum supply voltage of 2.5V, unlike the 24AA256 and 24FC256 which support operation down to 1.7V. The maximum clock frequency for the 24LC256 is limited to 400 kHz.

Memory IC Replacement Considerations

24LC256-I/MS

Memory IC FAQ

How many devices can be connected to the same bus?

Up to eight devices can be cascaded on the same bus using different combinations of the A0, A1, and A2 chip select pins.

What is the function of the WP pin?

The Write-Protect (WP) pin allows hardware protection of the entire memory array. When tied to VCC, write operations are inhibited, while read operations remain unaffected.