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    AT45DB041E-SSHN-T device package

    AT45DB041E-SSHN-T schematic symbol

    In the past few decades, the electronics and communication technology has seen unparalleled growth and advancement. From simplistic analog devices of the 80s to the smart digital gadgets of today, memory chips have always been an integral part of the electronic circuits. No digital computing system can function without these memory chips. There are different types and categories of memory chips used in the electronic circuits. One of the most widely used memory type is the flash EEPROM (Electrically Erasable Programmable Read Only Memory). The flash memory chips are very widely used in computers and reprogrammable embedded systems. The flash EEPROMs use serial interfaces like SPI and I2C for reading/writing of data. Most of the modern microcontrollers and SOCs have flash memory built into the same device package. The option of erasing and rewriting the flash memory makes them very attractive for circuit designers.

    What is AT45DB041E-SSHN-T?

    The AT45DB041E-SSHN-T is a serial-interface sequential-access flash memory from Adesto Technologies. This general purpose flash memory can be used in a wide range of applications including audio systems, image processing systems, data storage devices, computing devices, and embedded systems. The AT45DB041E-SSHN-T also support RapidS serial interface for very high data transmission rates. The AT45DB041E-SSHN-T flash memory chip contains 2048 pages of 256 bytes each. Apart from the main memory, the chip also includes 2 x 256 byte SRAM buffers. These buffers allow continuous data streaming during the reprogramming and can also be used as additional scratch-pad memory. This flash memory uses sequential access which significantly reduces the pin count, minimizes noise, reduces package size and increases reliability. The AT45DB041E-SSHN-T is suitable for applications which require high-density, low pin-count and low power consumption.

    Pin Configuration

    The pin configuration of the AT45DB041E-SSHN-T serial flash memory is given in the table below:

    Pin name Pin description
    CS Chip select pin
    SCK Serial clock pin
    SI Serial input pin
    SO Serial output pin
    WP Wire protect
    RESET Reset pin
    Vcc Power supply pin
    GND Ground


    • Support standard, fast and fast-plus I2C protocols
    • Voltage supply range of 1.65V to 3.6V
    • Supports SPI interface
    • Supports RapidS serial interface
    • User configurable page size
    • 2 x independent SRAM buffers
    • Flexible program/erase options
    • Hardware and software security features
    • OPT security register
    • Hardware and software controlled reset options
    • Low power consumption
    • 100,000 program/erase cycles per page
    • Data retention for 20 years
    • Industrial temperature range
    • Lead-free SOIC-8 package


    The applications of AT45DB041E-SSHN-T serial flash memory are provided as following:

    • Audio systems
    • Voice based systems
    • Image processing systems
    • Data storage applications
    • Embedded systems


    The major technical specifications of the AT45DB041E-SSHN-T serial flash memory are provided as following:

    • Package: 8-pin SOIC
    • Input voltage range: 1.65V to 3.6V
    • SRAM buffers: 2 x 256 bytes
    • Active read current: 7mA
    • Standby current: 40uA
    • Clock frequency: 85 MHz
    • Program/erase cycles: 100,000 per page
    • Data retention: 20 years

    How AT45DB041E-SSHN-T?

    The AT45DB041E-SSHN-T is a serial flash memory chip manufactured by Adesto Technologies. This flash memory chip supports SPI and RapidS serial communication interfaces. This flash memory chip is widely used as a reprogrammable memory in handheld electronics, consumer electronics, computers, and embedded systems. The flash memory is typically interfaced to a microcontroller or a microprocessor for read/write operations within an embedded system.

    Following is the application circuit of AT45DB041E-SSHN-T serial flash interfaced with Arduino microcontroller using SPI protocol.

    AT45DB041E-SSHN-T application circuit

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