24FC256-I/SN

Memory IC Overview

The Microchip Technology 24FC256-I/SN 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 a maximum clock frequency of 1 MHz at VCC ≥ 2.5V, with 400 kHz operation at lower voltages. The device utilizes a Two-Wire Serial Interface compatible with I²C protocols. It features 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 SOIC package and is rated for industrial temperature ranges from -40°C to +85°C.

Memory IC Feature Summary

• Supports high-speed serial data transmission up to 1 MHz under specified voltage conditions
• Includes a 64-byte page write buffer to optimize write cycle efficiency
• Provides hardware-based write protection through the dedicated WP pin
• Features Schmitt trigger inputs on SDA and SCL lines for enhanced noise immunity

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing reliable parameter retention
• Embedded systems utilizing I²C bus architectures for configuration memory
• Low-power electronic devices operating within wide voltage constraints

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range requirements align with the 1.7V to 5.5V operational specification. Ensure the design accounts for the 1 MHz clock limit at higher voltages versus 400 kHz at lower voltages. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Memory IC Selection Notes

Select this component when a 256 Kbit capacity is required with high-speed I²C interface capabilities. It is suitable for designs needing operation down to 1.7V, distinguishing it from variants limited to 2.5V. Consider the 8-pin SOIC footprint for surface mount assembly. Evaluate the need for hardware write protection if data integrity against accidental writes is critical for the application.

Memory IC Part Context

This part belongs to the 24XX256 family of serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24AA256 and 24LC256 but offers distinct performance characteristics regarding speed and voltage tolerance. The 'I' designation indicates the industrial temperature range variant, while '/SN' specifies the 8-lead small outline integrated circuit package format.

Memory IC Replacement Considerations

The 24LC256 serves as a functional alternative but is restricted to a 2.5V minimum supply voltage and 400 kHz maximum clock speed. The 24AA256 also supports 1.7V operation but is limited to 400 kHz clock frequencies. Verify package compatibility and voltage specifications when substituting these related parts.