Adesto Technologies Corporation, Inc. Memory AT25DN256-SSHFGP-B

The AT25DN256-SSHFGP-B is a 256-Kbit SPI serial flash memory device from Quarktwin Technology Ltd. It operates with a supply voltage range of 2.3V to 3.6V and supports SPI modes 0 and 3, with a maximum operating frequency of 104MHz. The device features dual-output read capability, allowing for efficient data retrieval. Its flexible erase architecture includes small page erase (256 bytes), uniform block erase sizes (4-Kbyte and 32-Kbyte), and full chip erase options, making it suitable for both code and data storage applications. The memory device has a typical page program time of 1.25ms for 256 bytes and typical erase times of 35ms for 4-Kbyte blocks and 250ms for 32-Kbyte blocks. It includes a one-time programmable security register for unique device serialization and system-level electronic serial number storage. The AT25DN256 is designed for low power consumption, with typical standby current of 25µA and ultra-deep power down current of 350nA. It is compliant with industrial temperature ranges and is available in various package options, including 8-lead SOIC, 8-pad ultra-thin DFN, and 8-lead TSSOP. The device is suitable for high-volume consumer applications where efficient memory usage and low power operation are critical.