FT93C66A-USR-B

Overview

The FT93C66A-USR-B is a non-volatile EEPROM memory IC manufactured by Fremont Micro Devices Ltd. It offers a storage capacity of 4Kb, organized as 512 x 8 or 256 x 16 bits. The device supports a 3-wire serial interface with a clock frequency of 2 MHz. It operates within a supply voltage range of 1.8 V to 5.5 V and features a write cycle time of 10 ms for both word and page operations. The component is housed in an 8-SOP package with a width of 0.154 inches (3.90 mm) and is designed for through-hole installation. It functions reliably across a temperature range of -40°C to 85°C.

Feature Summary

• Supports 3-wire serial communication interface for data access
• Provides non-volatile data retention without power
• Operates with wide supply voltage compatibility from 1.8V to 5.5V
• Features fast 2 MHz clock frequency for efficient data transfer

Applications

• Embedded systems requiring small-scale non-volatile data storage
• Industrial control devices needing parameter retention
• Consumer electronics utilizing low-pin-count memory solutions
• Automotive modules compatible with 3-wire bus architectures

Procurement Notes

Verify the specific suffix 'USR-B' corresponds to the 8-SOP package and 3-wire interface variant when sourcing. Confirm RoHS3 compliance status for environmental regulations. Check manufacturer documentation for any recent product change notifications affecting pinout or electrical characteristics. Ensure the supplier provides official datasheets matching the Fremont Micro Devices Ltd part number to avoid confusion with similar SPI variants.

Selection Notes

Select this component when a 4Kb EEPROM with a 3-wire interface is required in an 8-SOP package. It is suitable for designs needing operation down to 1.8V. Compare against FT93C66A-IDR-B if a DIP package is preferred instead of SOP. Ensure the system architecture supports the 3-wire protocol rather than standard SPI before finalizing the choice.

Part Context

This part belongs to the FT93C66A family of EEPROMs from Fremont Micro Devices Ltd. It shares core functionality with other variants like FT93C66A-ISR-B but differs in packaging. The series is designed to replace legacy 93C66 devices. It complements other memory solutions in the portfolio such as the FT93C46A series for smaller capacities.

Replacement Considerations

FT93C66A-ISR-B is listed as a similar alternative by distributors. Verify package compatibility between SOP and other formats when substituting. Direct replacements may require checking interface pinouts against the specific application circuit requirements.