Serial Flash

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Overview

Broadest Product Offering, Most Feature Rich Architectures

Adesto Technologies Serial Flash product families include the AT45xxx “DataFlash” and AT25xxx “BIOS Flash” product lines. Adesto Technologies continues to offer customers a variety of Serial Flash products that incorporate some of the industry's most advanced and flexible features, many of which are unparalleled by other solutions on the market. The Adesto Serial Flash family of products is based on proven and robust NOR Flash technology utilized on all of our Serial Flash devices.

The AT45DB series DataFlash family provides system developers with an extremely flexible solution by utilizing a page-erase architecture to allow the smallest amount of data (as little as 256 bytes) to be erased compared to any other Flash solution on the market today. With the DataFlash, a single byte of data can also be altered by using the on-board SRAM buffers to perform a totally self-contained read-modify-write operation. Coupled with advanced protection and security features, the DataFlash is ideal for many high-volume applications that need to rely upon a memory device to provide secure, tamper-proof code and data storage.

The AT25D series Serial Flash family incorporates a uniform block-erase (4-KBytes, 32-KBytes, and 64-KBytes) architecture to provide a high level of flexibility for a wide variety of code storage applications. Similar to the DataFlash, the AT25D series devices feature advanced security and protection functions to prevent critical code blocks from being erroneously or maliciously altered. In addition, the AT25D series devices are pin-compatible with Serial EEPROMs, giving developers the flexibility to increase memory size without changing the board layout.

Key Features

Flexible offering - With two Serial Flash families to choose from, system designers can select the device that best meets their specific application requirements for storing any type of data whether it is boot code, program code, vital preference data or logged data.

SPI interface - The simple serial peripheral interface (SPI) greatly reduces pin counts and simplifies routing, which conserves circuit board space and reduces switching noise, manufacturing complexity, and lowers overall system cost.

Superior functionality - The full-featured DataFlash family takes SPI Serial Flash to the next level with its flexible page erase architecture and its advanced protection and security features to enable system integration, robustness and cost reduction.

Easy migration - All Adesto SPI devices are pin-compatible and require only 4 pins to connect to the MCU allowing for an easy migration path to higher densities without any board changes.

Tamper proof - The advanced security and protection features allow any combination of sectors to be individually protected and/or permanently locked to ensure vital code and data remains protected while other portions of memory are updated.

Page erase - The DataFlash's small page erase architecture allows key software routines, parameters and user data to be stored more efficiently, so that memory space isn't wasted by having to allocate large sectors for different types of code or data.

Block erase - While not as granular as DataFlash, the uniform block erase architecture in the AT25D series is ideal for embedded code and data storage in a wide variety of applications.

Serial Flash Devices

Device Family	Summary Benefit	Applications	Technologies	Key Parameters
DataFlash	SPI compatible Serial Flash Page erase architecture allows erasing as little as 256 bytes of memory Extra memory in every device (up to 2-Mbits extra in a 64-Mbit device) Advanced memory protection and security features to better protect firmware and data	Code shadowing and data storage applications such as Smart Energy Meters, STBs (set-top boxes), GbE LAN controllers, DECT phones, industrial controls, etc.	Low voltage operation Dual, independent SRAM buffers Configurable page size Individual sector protection Individual sector lockdown (ROM) 128-byte security register Program/erase suspend and resume	1-Mbit to 64-Mbits Up to 100MHz operation Dual-I/O and Quad-I/O As low as 2.3V operation 8-lead SOIC and UDFN BGA/WLCSP options
Details Feature-rich, page erase (as small as 256 bytes) SPI-compatible Serial Flash with advanced protection and security features to provide developers with the most flexible, easy-to-use Serial Flash solution on the market to address virtually any application. Dual-I/O and Quad-I/O interface options provide the ability to double and quadruple read throughputs. Learn more
Block Erase	SPI compatible Serial Flash Block erase architecture (4KB, 32KB, and 64KB) Advanced memory protection and security features to better protect firmware and data	Code shadowing and data storage applications such as PC BIOS, DVD players, LCD TVs, portable consumer products, etc.	Low voltage operation Individual sector protection Individual sector lockdown (ROM) 128-byte security register Program/erase suspend and resume	512-Kbit to 64-Mbits Up to 100MHz operation Dual-I/O As low as 2.3V operation 8-lead SOIC and UDFN BGA/WLCSP options
Details SPI-compatible block erase Serial Flash with erase sizes of 4KB, 32KB, and 64KB to provide flexibility for code and data management. Devices provide advanced protection and security features to further enhance code and data stability, and increased read throughputs can be attained by using the Dual-I/O mode of the devices. Learn more
Quad-I/O Block Erase	SPI compatible Serial Flash Block erase architecture (4KB, 32KB, and 64KB) Advanced memory protection and security features to better protect firmware and data	Code shadowing and data storage applications such as PC BIOS, DVD players, LCD TVs, portable consumer products, etc.	Low voltage operation Individual sector protection Individual sector lockdown (ROM) 128-byte security register Program/erase suspend and resume	8-Mbit to 64-Mbits Up to 100MHz operation Dual-I/O and Quad-I/O As low as 2.3V operation 8-lead SOIC and UDFN BGA/WLCSP options
Details SPI-compatible block erase Serial Flash with a Quad-I/O interface option to meet the demands of higher performance applications. Block erase sizes of 4KB, 32KB, and 64KB provide flexibility for code and data management while advanced protection and security features further enhance code and data stability Learn more
1.8V Block Erase	SPI compatible Serial Flash Block erase architecture (4KB, 32KB, and 64KB) Advanced memory protection and security features to better protect firmware and data	Code shadowing and data storage applications such as PC BIOS, DVD players, LCD TVs, portable consumer products, etc.	Low voltage operation Individual sector protection Individual sector lockdown (ROM) 128-byte security register Program/erase suspend and resume	Up to 100MHz operation Dual-I/O As low as 1.65V operation 8-lead SOIC and UDFN BGA/WLCSP options
Details Ultra low-voltage (1.65V minimum) SPI-compatible block erase Serial Flash designed specifically for low-voltage, low-power portable applications. Block erase sizes of 4KB, 32KB, and 64KB provide flexibility for code and data management while advanced protection and security features further enhance code and data stability. For improved performance, increased read throughputs can be attained by using the Dual-I/O mode of the devices. Learn more

Documents

Flash Chips

Documents

To download a brochure which includes the Serial Flash family of products, click here

Other

AT45DB321 Reliability Qualification Report

file size: 10267, 5 pages, updated: 10/2003

Datasheets

Flash Chips

Datasheets

AT25DF041A Complete

file size: 866805, 41 pages, revision D, updated: 09/2008

4Mb, 70MHz Serial Firmware DataFlash, SPI Mode 0 and 3 Compatible, Byte and Page Program, Block Erase (4KB, 32KB, and 64KB) and Chip Erase, Individual Sector Protection with Global Protect/Unprotect Feature, Hardware and Software Locking, Automatic Erase/Program Fail Checking/Reporting, JEDEC Standard ID, 8-Lead SOIC (150-mil and 200-mil) and 8-Contact UDFN (5mm x 6mm x 0.6mm).

AT25DF081A Complete

file size: 1063094, 53 pages, revision B, updated: 08/2010

8Mb, 2.7V-minimum, SPI Serial Flash Memory

AT25DF321A Complete

file size: 2877333, 51 pages, revision D, updated: 12/2009

32Mb, 2.7V-minimum, 100MHz SPI Serial Flash Memory, Byte and Page Program, Block Erase (4KB, 32KB, and 64KB) and Chip Erase, Individual Sector Protection with Global Protect/Unprotect Feature, Hardware and Software Locking, Sector Lockdown (ROM), Security Register, Program/Erase Suspend/Resume, Automatic Program/Erase Fail Reporting, Dual-Input Programming, Dual-Output Read, JEDEC Standard ID, 8-lead SOIC (208-mil) and 8-pad UDFN (5 x 6 x 0.6mm).

AT25DF641 Complete

file size: 839818, 56 pages, revision F, updated: 04/2010

64Mb, 2.7V minimum, 100MHz SPI Serial Flash Memory, Byte and Page Program, Block Erase (4KB, 32KB, and 64KB) and Chip Erase, Individual Sector Protection with Global Protect/Unprotect Feature, Hardware and Software Locking, Sector Lockdown (ROM), Security Register, Program/Erase Suspend/Resume, Automatic Erase/Program Fail Checking/Reporting, Dual-Input Programming, Dual-Output Read, JEDEC Standard ID, 16-Lead SOIC (300-mil) and 8-Contact VDFN (6mm x 8mm x 1mm).

AT25DF641A Complete

file size: 2.21MB, 57 pages, revision D, updated: 05/2013

64Mb, 2.7V-minimum, SPI Interface Serial, Flash Memory, Byte and Page Program, Block Erase (4KB, 32KB, and 64KB) and Chip Erase, Individual Sector Protection with Global Protect/Unprotect Feature, Hardware and Software Locking, Sector Lockdown (ROM), Security Register, Program/Erase Suspend/Resume, Automatic Erase/Program Fail Checking/Reporting, Dual-Input Programming and Dual-Output Read.

AT25DL081 Complete

file size: 1.99MB, 57 pages, revision B, updated: 04/2012

AT25DL161 Preliminary

file size: 2.02MB, 57 pages, revision B, updated: 05/2012

AT25DQ321 Preliminary

file size: 4782KB, 64 pages, revision B, updated: 03/2012

32Mb, 2.7V-minimum, 100MHz SPI Serial Flash Memory with Dual- and Quad-I/O Support, Byte and Page Program, Block Erase (4KB, 32KB, and 64KB) and Full Chip Erase, Individual Sector Protection with Global Protect/Unprotect Feature, Hardware and Software Locking, Sector Lockdown (ROM), OTP Security Register, Program/Erase Suspend/Resume, AutomaticProgram/Erase Fail Reporting

AT25F512B Complete

file size: 871851, 34 pages, revision C, updated: 12/2008

512Kb, 2.7V-minimum, 70MHz SPI Serial Flash Memory, Byte and Page Program, Block Erase (4KB and 32KB) and Chip Erase, Full Device Protection, Hardware and Software Locking, Security Register, Automatic Program/Erase Fail Reporting, JEDEC Standard ID, 8-Lead SOIC (150-mil) and 8-Pad UDFN (2 x 3 x 0.6mm)

AT45DB011D Complete

file size: 1715419, 52 pages, revision H, updated: 04/2009

1Mb, 2.7V-minimum serial-interface Flash with one 264-byte SRAM Buffer

AT45DB021D Complete

file size: 1688728, 48 pages, revision J, updated: 05/2010

2Mb, 2.7V-minimum serial-interface Flash with one 264-byte SRAM Buffer

AT45DB021E Advance Information

file size: 2.27MB, 68 pages, revision A, updated: 05/2012

2Mb, 1.65V-minimum SPI DataFlash

AT45DB041D Complete

file size: 1369244, 55 pages, revision P, updated: 09/2009

4Mb, 2.5V or 2.7V DataFlash

AT45DB041E Advance Information

file size: 2421000, 71 pages, revision A, updated: 09/2012

4Mb w/extra 128 Kbits, 1.65V DataFlash

AT45DB081D Complete

file size: 1788843, 53 pages, revision M, updated: 05/2010

8Mb, 2.5V or 2.7V DataFlash

AT45DB161D Complete

file size: 2179699, 51 pages, revision N, updated: 05/2010

16Mb, 2.5V or 2.7V DataFlash

AT45DB161E Complete

file size: 2.25MB, 71 pages, revision C, updated: 07/2012

16Mb, 2.3V or 2.5V DataFlash

AT45DB321D Complete

file size: 4262234, 51 pages, revision Q, updated: 06/2011

32Mb, 2.5V or 2.7V DataFlash

AT45DB321E Preliminary

file size: 2.33MB, 71 pages, revision A, updated: 08/2012

32Mb, 2.3V or 2.5V Minimum SPI DataFlash

AT45DB642D Complete

file size: 1791898, 58 pages, revision K, updated: 04/2009

64Mb, 2.7V Dual-Interface Flash with two 1056-byte SRAM Buffers.

Applications

Flash Chips

Application Notes

AVR107: Interfacing AVR microcontrollers with serial memories

file size: 34k8, revision A, updated: 03/2005

This application note describes the functionality and the architecture of SPI serial memories drivers as well as the motivation of the selected solution.

AVR107: Interfacing AVR microcontrollers with serial memories

ile size: 496998, 22 pages, revision A, updated: 03/2005

This application note describes the functionality and the architecture of SPI serial memories drivers as well as the motivation of the selected solution.

MicroLeadFrame Packages Pad Landing Recommendations

file size: 701465, 15 pages, revision B, updated: 09/2006

This application note provides PCB designers with a set of guidelines for successful board mounting of Adesto's DataFlash memories housed in the MicroLeadFrame (MLF) package.

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Flash Chips

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Serial Flash

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Key Features

Serial Flash Devices

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