Features
• Single 1.7 V - 3.6 V supply
• Serial Peripheral Interface (SPI) compatible
• Supports SPI modes 0 and 3
• Supports RapidS™ operation
• Continuous read capability through entire array
• Up to 85 MHz
• Low-power read option up to 15 MHz
• Clock-to-output time (tV) of 6 ns maximum
• User configurable page size
• 256 bytes per page
• 264 bytes per page (default)
• Page size can be factory pre-configured for 256 bytes
• Two fully independent SRAM data buffers (256/264 bytes)
• Allows receiving data while reprogramming the main memory array
• Flexible programming options
• Byte/Page Program (1 to 256/264 bytes) directly into main memory
• Buffer Write
• Buffer to Main Memory Page Program
• Flexible erase options
• Page Erase (256/264 bytes)
• Block Erase (2 kB)
• Sector Erase (64 kB)
• Chip Erase (8 Mbits)
• Program and Erase Suspend/Resume
• Advanced hardware and software data protection features
• Individual sector protection
• Individual sector lockdown to make any sector permanently read-only
• 128-byte, One-Time Programmable (OTP) Security Register
• 64 bytes factory programmed with a unique identifier
• 64 bytes user programmable
• Hardware and software controlled reset options
• JEDEC Standard Manufacturer and Device ID Read
• Low power dissipation
• 400 nA Ultra-Deep Power-Down current (typical)
• 4.5 µA Deep Power-Down current (typical)
• 25 µA Standby current (typical)
• 11 mA Active Read current (typical at 20 MHz)
• Endurance: 100,000 program/erase cycles per page minimum
• Data retention: 20 years
• Complies with full industrial temperature range
• Green (Pb/Halide-free/RoHS compliant) packaging options
• 8-lead SOIC (0.150" wide and 0.208" wide)
• 8-pad Ultra-thin DFN (5 x 6 x 0.6 mm)
• 8-ball (2 x4 array) Wafer Level Chip Scale Package
• Die in Wafer Form

1. Description
The AT45DB081E is a 1.7 V minimum, serial-interface sequential access Flash memory ideally suited for a wide
variety of digital voice, image, program code, and data storage applications. The AT45DB081E also supports the
RapidS serial interface for applications requiring very high speed operation. Its 8,650,752 bits of memory are
organized as 4,096 pages of 256 bytes or 264 bytes each. In addition to the main memory, the AT45DB081E also
contains two SRAM buffers of 256/264 bytes each. The buffers allow receiving of data while a page in the main
memory is being reprogrammed. Interleaving between both buffers can dramatically increase a system's ability to
write a continuous data stream. Also, the SRAM buffers can be used as additional system scratch pad memory,
and E2PROM emulation (bit or byte alterability) can be easily handled with a self-contained three step readmodify-write operation.
Unlike conventional Flash memories that are accessed randomly with multiple address lines and a parallel
interface, the DataFlash® uses a serial interface to sequentially access its data. The simple sequential access
dramatically reduces active pin count, facilitates simplified hardware layout, increases system reliability, minimizes
switching noise, and reduces package size. The device is optimized for use in many commercial and industrial
applications where high-density, low-pin count, low-voltage, and low-power are essential.
To allow for simple in-system re-programmability, the AT45DB081E does not require high input voltages for
programming. The device operates from a single 1.7 V to 3.6 V power supply for the erase and program and read
operations. The AT45DB081E is enabled through the Chip Select pin (CS) and accessed through a three-wire
interface consisting of the Serial Input (SI), Serial Output (SO), and the Serial Clock (SCK).
All programming and erase cycles are self-timed.