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HA16117FPBJ 参数 Datasheet PDF下载

HA16117FPBJ图片预览
型号: HA16117FPBJ
PDF下载: 下载PDF文件 查看货源
内容描述: CMOS看门狗定时器 [CMOS Watchdog Timer]
分类和应用: 光电二极管
文件页数/大小: 31 页 / 250 K
品牌: HITACHI-METALS [ HITACHI METALS, LTD ]
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HA16117F Series  
6. When P-RUN frequency fluctuates (1)  
If there is a double-pulse in P-RUN, the WD filter duty will be decreased and RES will be  
output, as shown in the figure below, for example. In this case, the condition for non-output of  
the RES signal is a value of 3 or less for the ratio of P-RUN pulse interval minimum value to  
maximum value (when fP-RUN 20 kHz). This is because the CR pin charge/discharge current  
ratio is 3.  
2 ms  
H
28 ms  
P-RUN  
L
H
Q
Q
L
H
L
H
A
L
5 V  
3.6 V  
CF  
0.9 V  
0 V  
H
WD  
L
5 V  
3.2 V  
1.6 V  
CR  
0 V  
H
B
C
L
H
L
H
RES  
L
20 ms  
13  
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