AT45DB021E-SHN-B

Product Overview

The AT45DB021E-SHN-B is a Renesas Electronics Corporation flash memory integrated circuit intended for non-volatile data storage in surface-mount systems. The device provides 2Mbit of FLASH memory organized as 264 Bytes x 1024 pages and communicates through an SPI interface at a 70 MHz clock frequency. It operates from a 1.65V to 3.6V supply and is specified for an operating temperature range of -40°C to 85°C (TC). The package is an 8-SOIC (0.209", 5.30mm Width) case.

Key Features

• 2Mbit non-volatile FLASH memory capacity with a 264 Bytes x 1024 pages organization.
• Serial Peripheral Interface (SPI) communication at a 70 MHz clock frequency.
• Supply voltage range of 1.65V to 3.6V and surface-mount 8-SOIC packaging.
• Write cycle times of 8µs for word operations and 3ms for page operations.
• Operating temperature range of -40°C to 85°C (TC).

Applications

• Embedded controllers that retain configuration parameters across power cycles.
• Data-logging modules that store records using an SPI-connected memory device.
• Communication equipment that caches lookup tables or device settings in external SPI flash.
• Systems that store firmware images or boot code in non-volatile SPI flash.

Design & Procurement Notes

Designers should verify that the host controller supports SPI communication at 70 MHz and can manage the 264 Bytes x 1024 pages organization when planning data layouts. The 1.65V to 3.6V supply range and 8-SOIC surface-mount package define the required board and power-domain constraints. The -40°C to 85°C (TC) operating range should be checked against the system's thermal profile. Write cycle times of 8µs for word operations and 3ms for page operations are relevant for update-frequency and timing budgets. The Active product status supports current design planning, while the non-volatile FLASH format should be evaluated against system-level data persistence and write-cycle requirements.