AT25DF021A-SSHN-B

Memory IC Overview

The AT25DF021A-SSHN-B is a 2-Mbit (256K x 8) Serial NOR Flash memory device manufactured by Renesas Electronics Corporation. It utilizes an SPI interface with a maximum clock frequency of 104 MHz. The component operates within a supply voltage range of 1.65V to 3.6V and supports an industrial temperature range from -40°C to +85°C. It is housed in an 8-SOIC package with a width of 3.90mm. Key electrical characteristics include a maximum active read current of 7 mA, a word write cycle time of 8µs, and a page write cycle time of 2.5ms.

Memory IC Feature Summary

• Supports standard Single, Dual, and Quad I/O SPI modes for flexible data transfer rates.
• Enables Execute-In-Place (XiP) operation for direct code execution from the flash memory.
• Features a uniform block architecture optimized for efficient code and data storage management.

Memory IC Applications

• Embedded systems requiring non-volatile code storage
• Consumer electronics firmware applications
• Industrial control system data logging

Memory IC Procurement Notes

Verify the specific suffix 'B' against the manufacturer's official documentation to confirm the tube packaging configuration, as other suffixes may indicate tape-and-reel options. Ensure the ordering part number matches the exact pinout and package dimensions specified in the latest datasheet revision to avoid integration errors during PCB assembly.

Memory IC Selection Notes

Select this component when a 2-Mbit capacity is required alongside high-speed 104 MHz SPI performance. It is suitable for designs needing a wide voltage operating range down to 1.65V. Consider the 8-SOIC package if through-hole or larger surface-mount spacing is preferred over smaller DFN alternatives within the same series.

Memory IC Part Context

This device belongs to the AT25DF021A family of Serial NOR Flash memories. It shares architectural similarities with other members like the AT25DF021A-MAHN-T but differs in physical packaging. The family is designed for general-purpose storage where reliability and standard SPI compatibility are prioritized over specialized automotive or high-density requirements.

Memory IC Replacement Considerations

AT25DF021A-SSHN-T offers identical electrical specifications in a tape-and-reel format. AT25XE021A-SSHN-T provides similar capacity but operates at a lower 70 MHz clock speed. Verify package compatibility before substituting with variants such as AT25DF021A-XMHN-B.