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BM29F400B-15TC PDF预览

BM29F400B-15TC

更新时间: 2024-11-20 15:28:43
品牌 Logo 应用领域
华邦 - WINBOND 光电二极管内存集成电路
页数 文件大小 规格书
37页 259K
描述
Flash, 256KX16, 150ns, PDSO48

BM29F400B-15TC 技术参数

是否Rohs认证: 不符合生命周期:Active
Reach Compliance Code:not_compliant风险等级:5.88
最长访问时间:150 ns备用内存宽度:8
启动块:BOTTOM命令用户界面:YES
数据轮询:YES耐久性:10000 Write/Erase Cycles
JESD-30 代码:R-PDSO-G48JESD-609代码:e0
内存密度:4194304 bit内存集成电路类型:FLASH
内存宽度:16部门数/规模:1,2,1,7
端子数量:48字数:262144 words
字数代码:256000最高工作温度:70 °C
最低工作温度:组织:256KX16
封装主体材料:PLASTIC/EPOXY封装代码:TSSOP
封装等效代码:TSSOP48,.8,20封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH并行/串行:PARALLEL
电源:5 V认证状态:Not Qualified
就绪/忙碌:YES部门规模:16K,8K,32K,64K
最大待机电流:0.0001 A子类别:Flash Memories
最大压摆率:0.06 mA标称供电电压 (Vsup):5 V
表面贴装:YES技术:CMOS
温度等级:COMMERCIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:0.5 mm
端子位置:DUAL切换位:YES
类型:NOR TYPEBase Number Matches:1

BM29F400B-15TC 数据手册

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BRIGHT  
Microelectronics  
Inc.  
BM29F400T/BM29F400B  
4MEGABIT (512K 8/ 256K 16)  
´
´
5VOLT SECTOR ERASE CMOS FLASH MEMORY  
GENERAL DESCRIPTION  
The BM29F400 is an 4 Megabit, 5.0 volt-only CMOS Flash memory device organized as a 512  
Kbytes of 8-bits each, or 256 Kbytes of 16 bits each. The device is offered in standard 48-pin TSOP  
package. It is designed to be programmed and erased in-system with a 5.0 volt power-supply and can  
also be reprogrammed in standard EPROM programmers.  
CE  
With access times of 90 nS, 120 nS, and 150 nS, the BM29F400 has separate chip enable  
, write  
WE OE  
enable  
, and output enable  
controls. BMI's memory devices reliably store memory data even  
after 100,000 program and erase cycles.  
The BM29F400 is entirely pin and command set compatible with the JEDEC standard for 4 Megabit  
Flash memory devices. Commands are written to the command register using standard  
microprocessor write timings. Register contents serve as input to an internal state-machine which  
controls the erase and programming circuitry. Write cycles also internally latch addresses and data  
needed for the programming and erase operations.  
The BM29F400 is programmed by executing the program command sequence. This will start the  
internal byte/word programming algorithm that automatically times the program pulse width and also  
verifies the proper cell margin. Erase is accomplished by executing either the sector erase or chip  
erase command sequence. This will start the internal erasing algorithm that automatically times the  
erase pulse width and also verifies the proper cell margin. No preprogramming is required prior to  
execution of the internal erase algorithm. Sectors of the BM29F400 Flash memory array are  
electrically erased via Fowler-Nordheim tunneling. Bytes/words are programmed one byte/word at a  
time using a hot electron injection mechanism.  
The BM29F400 features a sector erase architecture. The device memory array is divided into one 16  
Kbytes, two 8 Kbytes, one 32 Kbytes, and seven 64 Kbytes. Sectors can be erased individually or in  
groups without affecting the data in other sectors. Multiple sector erase and full chip erase capabilities  
add flexibility to altering the data in the device. To protect this data from accidental program and  
erase, the device also has a sector protect function. This function hardware write protects the  
selected sector(s). The sector protect and sector unprotect features can be enabled in a PROM  
programmer.  
For read, program and erase operation, the BM29F400 needs a single 5.0 volt power-supply.  
Internally generated and well regulated voltages are provided for the program and erase operation. A  
low Vcc detector inhibits write operations on loss of power. End of program or erase is detected by the  
Ready/Busy status pin, Data Polling of DQ7, or by the Toggle Bit I feature on DQ6. Once the program  
or erase cycle has been successfully completed, the device internally resets to the Read mode.  
RESET  
RESET  
pin low during execution of an  
The BM29F400 also has a hardware  
Internal Programming or Erase command will terminate the operation and reset the device to the  
RESET  
pin. Driving the  
Read mode. The  
access to boot code upon completion of system reset, even if the Flash device is in the process of an  
RESET  
pin may be tied to the system reset circuitry, so that the system will have  
Internal Programming or Erase operation. If the device is reset using the  
pin during an  
Internal Programming or Erase operation, data in the address locations on which the internal state  
A Winbond Company  
Publication Release Date: December 1999  
Revision A2  
- 1 -  

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