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SST28VF040-300-3C-PH PDF预览

SST28VF040-300-3C-PH

更新时间： 2024-11-08 19:56:47
品牌 Logo 应用领域
芯科 - SILICON 光电二极管内存集成电路
页数 文件大小 规格书
2页 33K
描述
Flash, 512KX8, 300ns, PDIP32

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中文翻译

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SST28VF040-300-3C-PH 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：DIP, DIP32,.6Reach Compliance Code：unknown
风险等级：5.92最长访问时间：300 ns
命令用户界面：NO数据轮询：YES
耐久性：1000 Write/Erase CyclesJESD-30 代码：R-PDIP-T32
JESD-609代码：e0内存密度：4194304 bit
内存集成电路类型：FLASH内存宽度：8
部门数/规模：2K端子数量：32
字数：524288 words字数代码：512000
最高工作温度：70 °C最低工作温度：
组织：512KX8封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP32,.6
封装形状：RECTANGULAR封装形式：IN-LINE
并行/串行：PARALLEL电源：3/3.3 V
认证状态：Not Qualified部门规模：256
最大待机电流：0.00002 A子类别：Flash Memories
最大压摆率：0.025 mA表面贴装：NO
技术：CMOS温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
切换位：YES类型：NOR TYPE
Base Number Matches：1

SST28VF040-300-3C-PH 数据手册

 浏览型号SST28VF040-300-3C-PH的Datasheet PDF文件第2页 
Migration from SST28xF040 to SST28xF040A  
ApplicationNote  
April2000  
INTRODUCTION  
Inadditiontotheabove,alloftheSST28SF040Aproduct  
fromthepreviousmask-setrequiredpull-upresistorson  
CE# and WE#. The newer SST28SF040A, which starts  
sampling now (in late April, 2000), does not require pull-  
up resistors on CE# and WE#. However, if a system has  
been designed with the earlier SST28SF040A using the  
pull-up resistors, the newer SST28SF040A can be used  
in that system without any modifications.  
1
In this application note, we describe how an  
SST28xF040A can be used in place of an SST28xF040  
with no hardware or software changes.  
2
SST28xF040 is a 4M Small-Sector Flash memory  
product. These products are available in three voltage  
ranges–SST28SF040(5V),SST28LF040(3.0-3.6V)and  
SST28VF040(2.7-3.6V).  
3
Software comparison between SST28LF/VF040 and  
SST28VF040A  
SST is now introducing a new version of these products  
called the SST28xF040A, which will replace the above  
products. These products are available in two voltage  
ranges – SST28SF040A (5V) and SST28VF040A (2.7-  
3.6V). The SST28SF040A replaces the SST28SF040,  
whiletheSST28VF040AreplacestheSST28LF040and  
theSST28VF040.  
4
The SST28LF040 and the SST28VF040 have the same  
software commands set as the SST28VF040A. They  
alsosharethesameManufacturerID(0xBF)andDevice  
ID(0x04). As a result, any firmware written for the  
SST28LF/VF040 can be used with the SST28VF040A.  
5
6
Hardware comparisons between SST28LF/VF040  
andSST28VF040A  
Software comparison between SST28SF040 and  
SST28SF040A  
The SST28LF040 is offered in speeds of 200ns and  
250ns, and the SST28VF040 is offered in speeds of  
250ns and 300ns. The SST28VF040A is offered in  
speeds of 200ns and 250ns. Since the SST28VF040A  
offersthesamespeedsastheSST28LF040andawider  
voltage range, it can be used to substitute the  
SST28LF040. Also, since the SST28VF040A offers  
higher speeds than the SST28VF040, in the same volt-  
age range, it can also be used to substitute the  
SST28VF040.  
7
TheSST28SF040andtheSST28SF040Ahavethesame  
softwarecommandset,aswellasthesameManufacturer  
ID(0xBF)andDeviceID(0x04).Asaresult,anyfirmware  
written for the SST28SF040 can be used with the  
SST28SF040A.  
8
9
Hardware comparison between SST28SF040 and  
SST28SF040A  
TheSST28SF040andtheSST28SF040Ahavethesame  
packagesandpinouts, andsonoboardlayoutchangeis  
needed in designing the SST28SF040A in place of the  
SST28SF040.  
10  
11  
12  
13  
7
All Erase and Program timing parameters for all these  
productsarethesame.Oneoftheparameters–Address  
protect setup time (TPAS) looks different because it is  
referenced differently. In the SST28LF/VF040, TPAS is  
definedasthetimeconstraintbetweentheaddressbeing  
validandthefallingedgeofCE#,andisspecifiedas0ns.  
In the SST28VF040A, TPAS is defined as the time  
constraintbetweentheaddressbeingvalidandtherising  
edge of CE#, instead, and is specified as 40ns. This  
difference in referencing TPAS doesn’t impact the com-  
patibility of the SST28SF040A with the SST28SF040.  
The SST28SF040 is offered in speeds of 120ns and  
150ns, while the SST28SF040A is offered in speeds of  
90ns and 120ns. As a result, the SST28SF040A can be  
used to substitute the SST28xF040.  
All Erase and Program timing parameters for both these  
productsarethesame.Oneoftheparameters–Address  
protect setup time (TPAS) looks different because it is  
referenced differently. In the SST28SF040, TPAS is  
definedasthetimeconstraintbetweentheaddressbeing  
validandthefallingedgeofCE#, andisspecifiedas0ns.  
In the SST28SF040A, TPAS is defined as the time  
constraintbetweentheaddressbeingvalidandtherising  
edge of CE#, instead, and is specified at 40ns. This  
differenceinreferencingTPASdoesn’timpactthecompat-  
ibility of the SST28SF040A with the SST28SF040.  
Anotherparameter–Addressprotectholdtime(TPAH)is  
100ns in the SST28LF/VF040 and 0ns in the  
SST28VF040A. Since the SST28VF040A has a shorter  
TPAH, it can be used to substitute the SST28LF/VF040.  
15  
16  
Conclusion  
The SST28xF040A can be used to replace the  
SST28xF040, with no changes in board layout or soft-  
ware.  
Another parameter – Address protect hold time (TPAH) is  
50nsintheSST28SF040and0nsintheSST28SF040A.  
Since the SST28SF040A has a shorter TPAH, it can be  
used to substitute the SST28SF040.  
©2000 SiliconStorageTechnology,Inc.TheSSTlogoandSuperFlashareregisteredtrademarksofSiliconStorageTechnology,Inc.  
SSFisatrademarkofSiliconStorageTechnology,Inc.  
Thesespecificationsaresubjecttochangewithoutnotice.  
226-01 4/00  
12

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