FT24C128A-USR-B

Overview

The FT24C128A-USR-B is a serial EEPROM memory IC manufactured by Fremont Micro Devices Ltd. It provides a storage capacity of 128 Kbit, organized as 16K x 8 bits. The device utilizes an I²C interface with a maximum clock frequency of 1 MHz. Key electrical specifications include a write cycle time of 5 ms and an access time of 550 ns. It operates within a supply voltage range of 1.8 V to 5.5 V and supports a working temperature range from -40°C to +85°C. The component is housed in an 8-SOP package.

Feature Summary

• Non-volatile EEPROM technology for persistent data retention
• I²C serial interface compatibility
• Wide operating voltage support
• Industrial temperature range capability

Applications

• Data logging systems
• Configuration storage in embedded controllers
• Calibration data retention in industrial sensors

Procurement Notes

Verify the specific suffix 'USR-B' against official Fremont Micro Devices documentation to confirm pinout and package dimensions. Confirm current availability status as distribution channels may list discontinued or obsolete stock. Ensure the source document explicitly identifies this part number to avoid confusion with similar series variants like UTG or UDR.

Selection Notes

Select this component when a small-footprint, non-volatile memory solution is required for I²C-based designs. The 128 Kbit capacity suits applications needing moderate data storage without complex addressing schemes. Verify that the system voltage aligns with the 1.8 V to 5.5 V operational range and that the I²C bus speed does not exceed 1 MHz.

Part Context

This part belongs to the FT24C128A series of serial EEPROMs from Fremont Micro Devices. The series offers various package options including SOP, TSSOP, and DIP configurations. The USR-B designation specifically indicates the 8-SOP package variant. These devices are designed for general-purpose data storage in consumer and industrial electronics requiring reliable non-volatile memory.

Replacement Considerations

Cross-reference with other 128 Kbit I²C EEPROMs if sourcing is limited. Check pin-to-pin compatibility with alternative manufacturers such as Microchip or STMicroelectronics. Verify that substitute parts meet the same voltage and temperature specifications.