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HD6473434F16 参数 Datasheet PDF下载

HD6473434F16图片预览
型号: HD6473434F16
PDF下载: 下载PDF文件 查看货源
内容描述: 12伏不能应用于S -掩模模型(单电源规格) ,因为这可能会永久损坏设备。 [12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.]
分类和应用: 外围集成电路微控制器可编程只读存储器时钟
文件页数/大小: 752 页 / 2557 K
品牌: HITACHI [ HITACHI SEMICONDUCTOR ]
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18.3.3 Reliability of Programmed Data  
An effective way to assure the data holding characteristics of the programmed chips is to bake  
them at 150˚C, then screen them for data errors. This procedure quickly eliminates chips with  
PROM memory cells prone to early failure.  
Figure 18.7 shows the recommended screening procedure.  
Write and verify program  
Bake with power off  
125° to 150°C, 24 to 48Hr  
Read and check program  
Mount  
Figure 18.7 Recommended Screening Procedure  
If a series of write errors occurs while the same PROM programmer is in use, stop programming  
and check the PROM programmer and socket adapter for defects.  
Please inform Hitachi of any abnormal conditions noted during programming or in screening of  
program data after high-temperature baking.  
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