AT25DF641A 64-Mbit, 2.7V Minimum SPI Serial Flash Memory with DualI/O Support DATASHEET Features Single 2.7V - 3.6V supply Serial Peripheral Interface (SPI) compatible Supports SPI Modes 0 and 3 Supports RapidS operation Supports Dual-Input Program and Dual-Output Read Very high operating frequencies 100MHz for RapidS 85MHz for SPI Clock-to-output time (t ) of 5ns maximum V Flexible, optimized erase architecture for code + data storage applications Uniform 4KB, 32KB, and 64KB Block Erase Full Chip Erase Individual sector protection with Global Protect/Unprotect feature 128 Sectors of 64KB each Hardware controlled locking of protected sectors via WP pin Sector Lockdown Make any combination of 64KB sectors permanently read-only 128-byte One-Time Programmable (OTP) Security Register 64 bytes factory preprogrammed 64 bytes user programmable Flexible programming Byte/Page Program (1 to 256 bytes) Fast program and erase times 2.5ms typical Page Program (256 bytes) time 75ms typical 4KB Block Erase time 300ms typical 32KB Block Erase time 600ms typical 64KB Block Erase time Program and Erase Suspend/Resume Automatic checking and reporting of erase/program failures Software controlled reset JEDEC Standard Manufacturer and Device ID Read Methodology Low power dissipation 25mA Active Read current (typical at 20MHz) 5A Deep Power-Down current (typical) Endurance: 100,000 program/erase cycles Data retention: 20 years Complies with full industrial temperature range Industry standard green (Pb/Halide-free/RoHS compliant) package options 8-lead SOIC (0.208 wide) 8-pad Ultra-thin DFN (5 x 6 x 0.6mm) 8793FDFLASH11/20171. Description The AT25DF641A is a 2.7V minimum, serial-interface Flash memory ideally suited for a wide variety of high-volume consumer-based applications in which program code is shadowed from Flash memory into embedded or external RAM for execution. The flexible erase architecture of the AT25DF641A, with its erase granularity as small as 4KB, makes it ideal for data storage as well, eliminating the need for additional data storage EEPROM devices. The physical sectoring and the erase block sizes of the AT25DF641A have been optimized to meet the needs of today s code and data storage applications. By optimizing the size of the physical sectors and erase blocks, the memory space can be used much more efficiently. Because certain code modules and data storage segments must reside by themselves in their own protected sectors, the wasted and unused memory space that occurs with large sectored and large block erase Flash memory devices can be greatly reduced. This increased memory space efficiency allows additional code routines and data storage segments to be added while still maintaining the same overall device density. The AT25DF641A also offers a sophisticated method for protecting individual sectors against erroneous or malicious program and erase operations. By providing the ability to individually protect and unprotect sectors, a system can unprotect a specific sector to modify its contents while keeping the remaining sectors of the memory array securely protected. This is useful in applications where program code is patched or updated on a subroutine or module basis, or in applications where data storage segments need to be modified without running the risk of errant modifications to the program code segments. In addition to individual sector protection capabilities, the AT25DF641A incorporates Global Protect and Global Unprotect features that allow the entire memory array to be either protected or unprotected all at once. This reduces overhead during the manufacturing process since sectors do not have to be unprotected one by one prior to initial programming. To take code and data protection to the next level, the AT25DF641A incorporates a sector lockdown mechanism that allows any combination of individual 64KB sectors to be locked down and become permanently read-only. This addresses the need of certain secure applications that require portions of the Flash memory array to be permanently protected against malicious attempts at altering program code, data modules, security information or encryption/decryption algorithms, keys, and routines. The device also contains a specialized OTP (One-Time Programmable) Security Register that can be used for purposes such as unique device serialization, system-level Electronic Serial Number (ESN) storage, locked key storage, or other purposes. Specifically designed for use in 3V systems, the AT25DF641A supports read, program, and erase operations with a supply voltage range of 2.7V to 3.6V. No separate voltage is required for programming and erasing. AT25DF641A DATASHEET 2 8793FDFLASH11/2017