Features

Single 1.65V - 3.6V supply

Serial Peripheral Interface (SPI) compatible

Supports SPI modes 0 and 3

Supports RapidS™ operation

Continuous read capability through entire array

Up to 85MHz

Low-power read option up to 15MHz

Clock-to-output time (tV
) of 6ns maximum

User configurable page size

256 bytes per page (default)

264 bytes per page (customer selectable option)

One SRAM data buffer (256/264 bytes)

Flexible programming options

Byte/Page Program (1 to 256/264 bytes) directly into main memory

Buffer Write

Buffer to Main Memory Page Program

Single Command Page Read-Modify-Write Option

Flexible erase options

Page Erase (256/264 bytes)

Block Erase (2KB)

Sector Erase (32KB)

Chip Erase (2-Mbits)

128-byte Security Register

128 bytes factory programmed with a unique identifier

Hardware and software controlled reset options

JEDEC Standard Manufacturer and Device ID Read

Low-power dissipation

300nA Ultra-Deep Power-Down current (typical)

5µA Deep Power-Down current (typical)

25µA Standby current (typical)

7mA Active Read current (typical)

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 (0.150ʺ wide and 0.208" wide)

8-pad Ultra-thin DFN (5 x 6 x 0.6mm)

Description
The Adesto®
AT25PE20 is a 1.65V minimum, serial-interface sequential access Flash memory is ideally suited for a wide
variety of digital voice, image, program code, and data storage applications. The AT25PE20 also supports the RapidS
serial interface for applications requiring very high speed operation. Its 2,162,688 bits of memory are organized as 1,024
pages of 256 bytes (default) or 264 bytes (customer option) each. In addition to the main memory, AT25PE20 also
contains one SRAM buffer of 256/264 bytes. The Buffer can be used as additional system scratch memory, and E2PROM
emulation
(bit or byte alterability) can be easily handled with a self-contained three step read-modify-write operation.
Unlike conventional Flash memories that are accessed randomly with multiple address lines and a parallel interface, the
Adesto DataFlash-L®
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, AT25PE20 does not require high input voltages for programming. The
device operates from a single 1.65V to 3.6V power supply for the erase and program and read operations. The
AT25PE20 is enabled through the Chip Select pin (CS) and accessed via a 3-wire interface consisting of the Serial Input
(SI), Serial Output (SO), and the Serial Clock (SCK).
All programming and erase cycles are self-timed.