24FC128T-I/ST

Memory IC Overview

The Microchip Technology 24FC128T-I/ST is a 16K x 8 (128 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates with a single supply voltage ranging from 1.7V to 5.5V and features an I2C compatible two-wire serial interface supporting up to 1 MHz clock frequency at VCC ≥ 2.5V. The device utilizes low-power CMOS technology, offering a maximum standby current of 1 µA and write current of 3 mA. It includes a 64-byte page write buffer, hardware write-protect capability via the WP pin, and Schmitt trigger inputs for noise suppression. The component is housed in an 8-lead TSSOP package and supports industrial temperature ranges.

Memory IC Feature Summary

• Supports high-speed I2C communication with 1 MHz compatibility at sufficient supply voltages
• Features a 64-byte page write buffer for efficient data transfer operations
• Includes hardware write-protect functionality controlled by the WP pin
• Utilizes Schmitt trigger inputs to enhance noise suppression on the bus

Memory IC Applications

• Personal communications devices requiring non-volatile storage
• Data acquisition systems needing reliable parameter retention
• Embedded controllers utilizing I2C bus architectures

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'ST' denotes the 8-lead TSSOP package. Confirm the specific voltage requirements align with the 1.7V to 5.5V operational range. Ensure the application design accounts for the 1 MHz clock speed limitations at lower supply voltages below 2.5V. Cross-reference the datasheet revision to confirm pinout consistency for the TSSOP configuration.

Memory IC Selection Notes

Select this component when high-speed I2C performance is required alongside low power consumption. The 1.7V minimum operating voltage makes it suitable for battery-powered applications where voltage levels may drop. The hardware write-protect feature provides essential security for critical data storage. Consider the 64-byte page size when designing write algorithms to optimize bus throughput and minimize wear on the memory cells.

Memory IC Part Context

This part belongs to the 24XX128 family, which also includes the 24AA128 and 24LC128 variants. While sharing similar architecture and capacity, the 24FC128 distinguishes itself through its support for higher clock frequencies up to 1 MHz compared to the 400 kHz limit of other series members. All variants maintain the same physical footprint and pinout configurations across available packages.

Memory IC Replacement Considerations

Direct substitutes within the same family include the 24AA128T-I/ST and 24LC128T-I/ST. Note that these alternatives are limited to 400 kHz operation speeds. Verify that the system timing margins accommodate the reduced clock frequency if substituting with slower variants.