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AT29C020-90TU PDF预览

AT29C020-90TU

更新时间： 2024-11-08 06:38:19
品牌 Logo 应用领域
爱特美尔 - ATMEL 闪存
页数 文件大小 规格书
17页 403K
描述
2-megabit (256K x 8) 5-volt Only Flash Memory

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中文翻译

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AT29C020-90TU 数据手册

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Features  
• Fast Read Access Time – 70 ns  
• 5-volt Only Reprogramming  
• Sector Program Operation  
– Single Cycle Reprogram (Erase and Program)  
– 1024 Sectors (256 Bytes/Sector)  
– Internal Address and Data Latches for 256 Bytes  
• Internal Program Control and Timer  
• Hardware and Software Data Protection  
• Two 8K Bytes Boot Blocks with Lockout  
• Fast Sector Program Cycle Time – 10 ms  
• DATA Polling for End of Program Detection  
• Low Power Dissipation  
2-megabit  
(256K x 8)  
5-volt Only  
Flash Memory  
– 40 mA Active Current  
– 300 µA CMOS Standby Current  
• Typical Endurance > 10,000 Cycles  
• Single 5V 10% Supply  
• CMOS and TTL Compatible Inputs and Outputs  
• Green (Pb/Halide-free) Packaging Option  
AT29C020  
1. Description  
The AT29C020 is a 5-volt-only in-system Flash programmable and erasable read-only  
memory (PEROM). Its 2 megabits of memory is organized as 262,144 bytes. Manu-  
factured with Atmel’s advanced nonvolatile CMOS technology, the device offers  
access times to 70 ns with power dissipation of just 220 mW over the industrial tem-  
perature range. When the device is deselected, the CMOS standby current is less  
than 300 µA. Device endurance is such that any sector can typically be written to in  
excess of 10,000 times.  
To allow for simple in-system reprogrammability, the AT29C020 does not require high  
input voltages for programming. Five-volt-only commands determine the operation of  
the device. Reading data out of the device is similar to reading from an EPROM.  
Reprogramming the AT29C020 is performed on a sector basis; 256 bytes of data are  
loaded into the device and then simultaneously programmed.  
During a reprogram cycle, the address locations and 256 bytes of data are internally  
latched, freeing the address and data bus for other operations. Following the initiation  
of a program cycle, the device will automatically erase the sector and then program  
the latched data using an internal control timer. The end of a program cycle can be  
detected by DATA polling of I/O7. Once the end of a program cycle has been  
detected, a new access for a read or program can begin.  
0291S–FLASH–11/08  
1234567...17

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AT29C020-90TU 替代型号

型号 品牌 替代类型 描述 数据表
AT29C020-90TI ATMEL

完全替代

 Flash, 256KX8, 90ns, PDSO32, 8 X 20 MM, PLASTIC, MO-142BD, TSOP1-32
AT29C020-90TC ATMEL

完全替代

 2-Megabit 256K x 8 5-volt Only CMOS Flash Memory

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