AT25PE20 datasheet(3/64 Pages) DIALOG

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AT25PE20

DS-25PE20–139C–8/2018

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.

Pin Configurations and Pinouts

Figure 1-1.

Pinouts

Note:

The metal pad on the bottom of the UDFN package is not internally connected to a voltage potential.

This pad can be a “no connect” or connected to GND.

GND

Vcc

RESET

SCK

8-lead SOIC

Top View

GND

Vcc

RESET

SCK

8-pad UDFN

Top View

(through package)

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