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ASM705CPAF 参数 Datasheet PDF下载

ASM705CPAF图片预览
型号: ASM705CPAF
PDF下载: 下载PDF文件 查看货源
内容描述: 低功耗μP监控电路 [Low Power μP Supervisor Circuits]
分类和应用: 光电二极管监控ISM频段
文件页数/大小: 15 页 / 281 K
品牌: PULSECORE [ PulseCore Semiconductor ]
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ASM705/706/707/708  
ASM813L  
April 2008  
rev 1.6  
Monitoring a Negative Voltage  
The Power-Fail circuitry can also monitor a negative  
supply rail. When the negative rail is OK, PFO will be  
LOW, and when the negative rail is failing (not negative  
enough), PFO goes HIGH (the opposite of when positive  
voltages are monitored). To trigger a reset, these outputs  
need to be inverted: adding the resistors and transistor as  
shown achieves this. The RESET output will then have  
the same sense as for positive voltages: good = HIGH,  
bad = LOW. It should be noted that this circuit’s accuracy  
depends on the VCC line, the PFI threshold tolerance, and  
the resistors.  
Low Power µP Supervisor Circuits  
6 of 15  
Notice: The information in this document is subject to change without notice.