24FC256T-E/ST16KVAO

Memory IC Overview

The Microchip Technology 24FC256T-E/ST16KVAO is a 32K x 8 (256 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates across a broad voltage range of 1.7V to 5.5V and supports I2C compatible two-wire serial interfaces with clock frequencies up to 1 MHz at VCC ≥ 2.5V. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It is qualified under AEC-Q100 standards for automotive applications and offers data retention exceeding 200 years with over one million erase/write cycles.

Memory IC Feature Summary

• Supports high-speed 1 MHz I2C communication when operating above 2.5V
• Includes a 64-byte page write buffer for efficient data transfer
• Features hardware write protection via the WP pin
• AEC-Q100 qualified for automotive reliability

Memory IC Applications

• Automotive electronic systems requiring durable non-volatile storage
• Data acquisition modules needing reliable parameter retention
• Personal communications devices utilizing low-power memory
• Industrial control systems requiring wide temperature operation

Memory IC Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Extended temperature range (-40°C to +125°C) and 'ST' indicates the TSSOP package. Confirm the '16KVAO' suffix matches specific tape-and-reel or marking requirements. Ensure compatibility with the 1 MHz clock speed requirement by checking system voltage levels, as performance drops to 400 kHz below 2.5V.

Memory IC Selection Notes

Select this component when an I2C EEPROM requires extended industrial temperature ranges and automotive qualification. It is suitable for designs needing fast 1 MHz data rates at standard supply voltages. Consider the 64-byte page buffer size for write optimization. Verify that the TSSOP package fits the PCB layout constraints compared to other available packages like SOIC or MSOP.

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 but distinguishes itself through higher clock frequency capabilities and automotive qualification. The family utilizes a common I2C interface protocol, allowing for flexible bus configurations with up to eight devices.

Memory IC Replacement Considerations

Direct substitutes within the same family include the 24FC256-I/ST variant for Industrial temperature range applications. For broader package options, the 24FC256 in SOIC or DFN packages may be considered if form factor changes are acceptable. Cross-family replacements require verification of voltage ranges and interface speeds.