Renesas Electronics Corporation Memory AT25DF641A-SH-B

The AT25DF641A-SH-B is a 64-Mbit serial flash memory device from Quarktwin Technology Ltd., designed for applications requiring a minimum supply voltage of 2.7V and a maximum of 3.6V. It features a Serial Peripheral Interface (SPI) that supports both SPI Modes 0 and 3, with high operating frequencies of up to 100MHz for RapidS and 85MHz for standard SPI operations. The memory architecture includes flexible erase options with block sizes of 4KB, 32KB, and 64KB, as well as a full chip erase capability. This device supports dual-input programming and dual-output reading, enhancing data transfer efficiency. It offers robust data protection features, including individual sector protection, global protect/unprotect capabilities, and a sector lockdown mechanism for permanent read-only status. The AT25DF641A-SH-B also includes a One-Time Programmable (OTP) Security Register for secure storage of unique identifiers or keys. With a typical endurance of 100,000 program/erase cycles and a data retention period of 20 years, this memory device is suitable for a wide range of consumer applications. It is available in both 8-lead SOIC and ultra-thin DFN packages, compliant with RoHS standards. The device operates efficiently with low power dissipation, making it a viable option for energy-sensitive designs.