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AT45DB021D 2Mbit,SPI接口DateFlash存储器

Density	2M
I/O Pins	8
Interface Type	SPI, RapidS
Page Size (Bytes)	264
Vcc (V)	2.7
Pb-Free Packages	SOIC (150mil)8 SOIC (208mil)8 UDFN 8

2M bit, 2.7-Volt Minimum Serial-Interface Flash with One 264-Byte SRAM Buffer

The AT45DB021D is a 2.7V, serial-interface Flash memory ideally suited for a wide variety of digital voice-, image-, program code- and data-storage applications. The AT45DB021D supports RapidS serial interface for applications requiring very high speed operations. RapidS serial interface is SPI compatible for frequencies up to 66 MHz. Its 2,162,688 bits of memory are organized as 1,024 pages of 256 bytes or 264 bytes each. In addition to the main memory, the AT45DB021D also contains one SRAM buffer of 256/264 bytes. 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 RapidS serial interface to sequentially access its data. The simple sequential access dramatically reduces active pin count, facilitates 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 reprogrammability, the AT45DB021D does not require high input voltages for programming. The device operates from a single power supply, 2.7V to 3.6V, for both the program and read operations. The AT45DB021D is enabled through the chip select pin (CS) and accessed via 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.

AT45DB021D 特性

• Single 2.7V to 3.6V Supply
• RapidS® Serial Interface: 66 MHz Maximum Clock Frequency
  – SPI Compatible Modes 0 and 3
• User Configurable Page Size
  – 256 Bytes per Page
  – 264 Bytes per Page
  – Page Size Can Be Factory Pre-configured for 256 Bytes
• Page Program Operation
  – Intelligent Programming Operation
  – 1,024 Pages (256/264 Bytes/Page) Main Memory
• Flexible Erase Options
  – Page Erase (256 Bytes)
  – Block Erase (2 Kbytes)
  – Sector Erase (32 Kbytes)
  – Chip Erase (2 Mbits)
• One SRAM Data Buffer (256/264 Bytes)
• Continuous Read Capability through Entire Array
  – Ideal for Code Shadowing Applications
• Low-power Dissipation
  – 7 mA Active Read Current Typical
  – 25 μA Standby Current Typical
  – 5 μA Deep Power-down Typical
• Hardware and Software Data Protection Features
  – Individual Sector
• Sector Lockdown for Secure Code and Data Storage
  – Individual Sector
• Security: 128-byte Security Register
  – 64-byte User Programmable Space
  – Unique 64-byte Device Identifier
• JEDEC Standard Manufacturer and Device ID Read
• 100,000 Program/Erase Cycles Per Page Minimum
• Data Retention – 20 Years
• Industrial Temperature Range
• Green (Pb/Halide-free/RoHS Compliant) Packaging Options

AT45DB021D 订购型号

Ordering Code	Package	Lead Finish	Operating Voltage	Max. Freq. (MHz)	Operation Range
AT45DB021D-MH-Y AT45DB021D-MH-T AT45DB021D-MH-SL954 AT45DB021D-MH-SL955	8MA1	NiPdAu	2.7V to 3.6V	66	Industrial (-40°C to +85°C)
AT45DB021D-SSH-B AT45DB021D-SSH-T AT45DB021D-SSH-SL954 AT45DB021D-SSH-SL955	8S1	NiPdAu	2.7V to 3.6V	66	Industrial (-40°C to +85°C)
AT45DB021D-SH-B AT45DB021D-SH-T AT45DB021D-SH-SL954 AT45DB021D-SH-SL955	8S2	NiPdAu	2.7V to 3.6V	66	Industrial (-40°C to +85°C)

AT45DB021D 应用技术支持与电子电路设计开发资源下载

1. ATMEL 爱特梅尔Flash 存储器AT45DB021D 数据手册DataSheet 下载. PDF（PDF 文件格式完整版）
2. 串行Flash 产品选型指南（Excel 文档格式）
3. ATMEL 爱特梅尔公司全线产品目录. pdf
4. Programmer Support for Serial Flash Devices. pdf (Other, 8 pages, revision C, updated 4/08)
5. MicroLeadFrame Packages Pad Landing Recommendations (15 pages, revision B, updated 09/06). pdf
   This application note provides PCB designers with a set of guidelines for successful board mounting of Atmel's DataFlash memories housed in the MicroLeadFrame (MLF) package.
6. AN-4: Using Atmel's DataFlash (30 pages, updated 11/02) . pdf
   Atmel's DataFlash is a new Flash family designed specifically for data storage applications. This Application Note describes this family.
7. DataFlash Binary Page Size (2 pages, revision A, updated 5/08) . pdf
   Factory Configured DataFlash Binary Page Size options