FT24C256A-UDR-B

Overview

The FT24C256A-UDR-B is a 256Kb (32K x 8) serial EEPROM memory IC manufactured by Fremont Micro Devices Ltd. It utilizes an I²C interface with a maximum clock frequency of 1 MHz and features a write cycle time of 5 ms for both word and page operations. The device offers an access time of 550 ns and operates within a supply voltage range of 1.8V to 5.5V. It is housed in an 8-USON package, suitable for surface-mount applications, and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Non-volatile EEPROM storage architecture retaining data without power
• I²C serial interface supporting standard and fast mode communication
• Wide supply voltage compatibility ranging from 1.8V to 5.5V
• Compact surface-mount packaging designed for space-constrained designs

Applications

• Data logging systems requiring non-volatile parameter storage
• Consumer electronics configuration memory
• Industrial control system calibration data retention
• Embedded devices storing firmware version or user settings

Procurement Notes

Verify the specific suffix 'UDR-B' against official Fremont Micro Devices documentation to confirm the exact package type and tape/reel specifications. Ensure the ordering part number matches the required pinout and moisture sensitivity level for your assembly process. Cross-reference with authorized distributors to confirm current availability and lead times, as component status may vary by region.

Selection Notes

Select this component when a 256Kb capacity is required with I²C connectivity. The 1.8V to 5.5V operating range allows flexibility in low-power and standard voltage systems. Consider the 8-USON package dimensions for PCB layout constraints. Verify that the 1 MHz bus speed meets the system's timing requirements and that the -40°C to +85°C industrial temperature range aligns with the environmental conditions.

Part Context

This part belongs to the FT24C256A series of serial EEPROMs from Fremont Micro Devices. The series typically includes variants with different package options such as TSSOP, SOIC, and USON. The 'A' designation often indicates an enhanced version with improved performance characteristics compared to earlier generations. These devices are commonly used in applications requiring reliable, byte-writable non-volatile memory.

Replacement Considerations

Direct replacements must match the 256Kb capacity, I²C interface, and 1.8V-5.5V voltage range. Check pin-to-pin compatibility with other 8-pin EEPROM packages like those from Microchip or STMicroelectronics. Verify that the substitute device supports the same page write size and access times to ensure system stability.