24FC256T-I/SN

Memory IC Overview

The Microchip Technology 24FC256T-I/SN is a 32K x 8 (256-Kbit) Serial Electrically Erasable PROM (EEPROM). It operates across a voltage range of 1.7V to 5.5V and supports I2C compatible two-wire serial interfaces with maximum clock frequencies up to 1 MHz at VCC ≥ 2.5V, or 400 kHz at lower voltages. The device features a 64-byte page write buffer, hardware write-protect capability via the WP pin, and Schmitt trigger inputs for noise suppression. It is housed in an 8-SOIC package and qualified for industrial temperature ranges (-40°C to +85°C).

Memory IC Feature Summary

• Supports high-speed I2C communication with clock frequencies reaching 1 MHz.
• Includes a 64-byte page write buffer to optimize data writing efficiency.
• Features hardware write protection controlled by the dedicated WP pin.
• Incorporates Schmitt trigger inputs on SDA and SCL lines for enhanced noise immunity.

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 ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'SN' indicates the 8-Lead SOIC package. Confirm that the 'T' suffix denotes tape and reel packaging if required for automated assembly processes. Ensure compatibility with the host system's I2C bus voltage levels and pull-up resistor requirements for the selected clock speed.

Memory IC Selection Notes

Select this component when operation below 2.5V is required alongside high-speed 1 MHz I2C performance, as standard variants may limit speed at lower voltages. Consider the 64-byte page write feature for applications involving frequent small data updates. Verify that the physical dimensions of the 8-SOIC package fit the available PCB space and that the hardware write-protect functionality aligns with the system's security architecture.

Memory IC Part Context

This part belongs to the 24XX256 family of 256-Kbit Serial EEPROMs from Microchip Technology. It shares architectural similarities with the 24AA256 and 24LC256 models but offers distinct electrical characteristics, particularly regarding maximum clock frequency support at varying supply voltages. The family utilizes a common I2C interface protocol and pinout structure across multiple package options.

Memory IC Replacement Considerations

Direct substitutes include the 24AA256T-I/SN and 24LC256T-I/SN. Note that while these share the same memory capacity and interface, the 24LC256 variant typically restricts the maximum clock frequency to 400 kHz when operating below 2.5V, whereas the 24FC256 maintains higher speeds down to 2.5V.