串行FLASH 存储器AT45DB041B

AT45DB041B 概述

The AT45DB041B is an SPI compatible serial interface Flash memory ideally suited for a wide variety of digital voice-, image-, program code- and data-storage applications. Its 4,325,376 bits of memory are organized as 2048 pages of 264 bytes each. In addition to the main memory, the AT45DB041B also contains two SRAM data buffers of 264 bytes each.
The buffers allow receiving of data while a page in the main memory is being reprogrammed,as well as reading or writing a continuous data stream. EEPROM emulation (bit or byte alterability) is 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 DataFlash uses a SPI serial interface to sequentially access its data. DataFlash supports SPI mode 0 and mode 3. The simple serial interface facilitates hardware layout, increases system reliability, minimizes switching noise, and reduces package size and active pin count. 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. The device operates at clock frequencies up to 20 MHz with a typical active read current consumption of 4 mA. To allow for simple in-system reprogrammability, the AT45DB041B does not require high input voltages for programming. The device operates from a single power supply,2.5V to 3.6V or 2.7V to 3.6V, for both the program and read operations.

The
AT45DB041B is enabled through the chip select pin (CS) and accessed via a threewire
interface consisting of the Serial Input (SI), Serial Output (SO), and the Serial Clock (SCK).
All programming cycles are self-timed, and no separate erase cycle is required before
programming.
When the device is shipped from Atmel, the most significant page of the memory array may not
be erased. In other words, the contents of the last page may not be filled with FFH.

AT45DB041B 特性

• Single 2.5V - 3.6V or 2.7V - 3.6V Supply
  o Serial Peripheral Interface (SPI) Compatible
  o 20 MHz Max Clock Frequency
  o Page Program Operation
  – Single Cycle Reprogram (Erase and Program)
  – 2048 Pages (264 Bytes/Page) Main Memory
  o Supports Page and Block Erase Operations
  o Two 264-byte SRAM Data Buffers – Allows Receiving of Data
  while Reprogramming the Flash Memory Array
  o Continuous Read Capability through Entire Array
  – Ideal for Code Shadowing Applications
  o Low Power Dissipation
  – 4 mA Active Read Current Typical
  – 2 μA CMOS Standby Current Typical
  o Hardware Data Protection Feature
  o 5.0V-tolerant Inputs: SI, SCK, CS, RESET, and WP Pins
  o Commercial and Industrial Temperature Ranges
  o Green (Pb/Halide-free/RoHS Compliant) Package Options

AT45DB041B 订购型号

Ordering Code	Package	Lead Finish	Operating Voltage	Max. Freq. (MHz)	Operation Range
AT45DB041B-CC AT45DB041B-CNC AT45DB041B-RC AT45DB041B-SC AT45DB041B-TC	14C1 8CN3 28R 8S2 28T	-	-	20	Commercial (0° C to 70° C) 2.7V to 3.6V
AT45DB041B-CI AT45DB041B-CNI AT45DB041B-RI AT45DB041B-SI AT45DB041B-TI	28R 8CN3 8S2 28T	-	-	20	Industrial (-40°C to +85°C)
AT45DB041B-RC-2.5 AT45DB041B-CNC-2.5 AT45DB041B-SC-2.5 AT45DB041B-TC-2.5	28R 8CN3 8S2 28T	-	-	15	Commercial (0° C to 70° C) 2.7V to 3.6V
AT45DB041B-CU AT45DB041B-CNU AT45DB041B-RU AT45DB041B-SU AT45DB041B-TU	14C1 8CN3 28R 8S2 28T	-	-	20	Industrial (-40°C to +85°C)

AT45DB041B 技术支持与电子电路设计开发资源下载

• AT45DB041B 数据手册DataSheet 下载.pdf