AT25DF321A-SH-B

Product Overview

The AT25DF321A-SH-B from Renesas Electronics Corporation is a non-volatile FLASH memory IC with a 32Mbit capacity and an SPI interface. The device is specified for a clock frequency of 100 MHz and operates from a 2.7 V to 3.6 V supply. Its memory organization is 256 bytes by 16384 pages, with write cycle times listed as 7 µs for a word and 3 ms for a page. The surface-mount 8-SOIC package supports an operating temperature range of -40°C to 85°C (TC).

Key Features

• 32Mbit non-volatile FLASH memory organized as 256 bytes by 16384 pages
• SPI memory interface with a specified clock frequency of 100 MHz
• Write cycle time of 7 µs for a word and 3 ms for a page
• Supply voltage range of 2.7 V to 3.6 V
• Operating temperature range of -40°C to 85°C (TC)
• Surface-mount 8-SOIC package with 0.209 in (5.30 mm) width

Applications

• Firmware image storage for microcontroller-based embedded systems
• Persistent configuration or calibration data storage for electronic assemblies
• Non-volatile data retention in embedded devices that require SPI host access

Design & Procurement Notes

When selecting this memory, confirm that the host controller supports SPI communication at the specified 100 MHz clock frequency and that the system supply remains within 2.7 V to 3.6 V. The 256-byte page organization and 3 ms page write time should be considered in firmware update and data logging routines. The 8-SOIC surface-mount package and -40°C to 85°C (TC) range affect PCB layout and thermal design.