参数资料
| 型号： | AT45DB021B-SI |
| 厂商： | Atmel |
| 文件页数： | 1/32页 |
| 文件大小： | 0K |
| 描述： | IC FLASH 2MBIT 20MHZ 8SOIC |
| 标准包装： | 95 |
| 格式 - 存储器： | 闪存 |
| 存储器类型： | DataFLASH |
| 存储容量： | 2M（1024 页 x 264 字节） |
| 速度： | 20MHz |
| 接口： | SPI 3 线串行 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
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Features
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Single 2.7V - 3.6V Supply
Serial Peripheral Interface (SPI) Compatible
20 MHz Max Clock Frequency
Page Program Operation
– Single Cycle Reprogram (Erase and Program)
– 1024 Pages (264 Bytes/Page) Main Memory
Supports Page and Block Erase Operations
Two 264-byte SRAM Data Buffers – Allows Receiving of Data
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while Reprogramming of Nonvolatile Memory
Continuous Read Capability through Entire Array
– Ideal for Code Shadowing Applications
Low Power Dissipation
– 4 mA Active Read Current Typical
– 2 μA CMOS Standby Current Typical
Hardware Data Protection Feature
100% Compatible to AT45DB021 and AT45DB021A
5.0V-tolerant Inputs: SI, SCK, CS, RESET and WP Pins
Commercial and Industrial Temperature Ranges
Green (Pb/Halide-free/RoHS Compliant) Packaging Options
2-megabit
2.7-volt Only
DataFlash ?
AT45DB021B
1. Description
The AT45DB021B is a 2.7-volt only, serial interface Flash memory ideally suited for
a wide variety of digital voice-, image-, program code- and data-storage applications.
Its 2,162,688 bits of memory are organized as 1024 pages of 264 bytes each. In addi-
tion to the main memory, the AT45DB021B also contains two SRAM data buffers
of 264 bytes each. The buffers allow receiving of data while a page in the main mem-
ory 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 inter-
face, 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 commer-
cial 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 AT45DB021B 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 AT45DB021B 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 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.
1937J–DFLSH–9/05
相关PDF资料 |
PDF描述 |
|---|---|
| AT45DB021B-SC | IC FLASH 2MBIT 20MHZ 8SOIC |
| AT45DB021B-RI | IC FLASH 2MBIT 20MHZ 28SOIC |
| AT45DB021B-RC | IC FLASH 2MBIT 20MHZ 28SOIC |
| AT45DB011B-XC | IC FLASH 1MBIT 20MHZ 14TSSOP |
| AT45DB011B-SI | IC FLASH 1MBIT 20MHZ 8SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT45DB021B-SU | 功能描述:闪存 2M 8 I/O Pins SPI 264B 2.7V RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| AT45DB021B-TC | 功能描述:闪存 2M bit RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| AT45DB021BTI | 制造商:Atmel Corporation 功能描述: |
| AT45DB021B-TI | 功能描述:闪存 2M 2.7V RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| AT45DB021BTU | 制造商:Atmel Corporation 功能描述: |
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