Adesto Technologies Corporation, Inc. Memory AT45DB321D-SU-2.5

The AT45DB321D-SU-2.5 is a 32Mb serial flash memory device from Quarktwin Technology Ltd., operating at a voltage range of 2.5V to 3.6V. It features a RapidS serial interface compatible with SPI modes 0 and 3, supporting clock frequencies up to 50 MHz. The memory is organized into 8,192 pages, each with a configurable size of either 512 or 528 bytes, allowing for flexible data storage options. This device includes two SRAM buffers of 512/528 bytes, enabling simultaneous data reception while reprogramming the flash memory. It offers various erase options, including page, block, sector, and chip erase, with a minimum endurance of 100,000 program/erase cycles per page and a data retention period of 20 years. The AT45DB321D-SU-2.5 is designed for low power consumption, with typical active read current of 7mA and standby current of 25µA. Additionally, it incorporates hardware and software data protection features, including sector lockdown and a 128-byte security register. The device is suitable for a range of applications, including digital voice, image, and program code storage, particularly in environments requiring low voltage and low power operation.