欢迎访问ic37.com |
会员登录 免费注册
发布采购

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 ]
 浏览型号HA16117FPBJ的Datasheet PDF文件第1页浏览型号HA16117FPBJ的Datasheet PDF文件第2页浏览型号HA16117FPBJ的Datasheet PDF文件第4页浏览型号HA16117FPBJ的Datasheet PDF文件第5页浏览型号HA16117FPBJ的Datasheet PDF文件第6页浏览型号HA16117FPBJ的Datasheet PDF文件第7页浏览型号HA16117FPBJ的Datasheet PDF文件第8页浏览型号HA16117FPBJ的Datasheet PDF文件第9页  
HA16117F Series  
Block Diagram  
1
VCC  
5 V  
2.52 (117FA)  
2.36 (117FB)  
2.20 (117FC)  
Low voltage detector  
GND  
6
4
+
1
COMP.  
1.25 V  
GND  
CR  
RES  
5
I1  
Power-on and auto-reset circuit  
(*I1 < I2)  
0.1 µ  
to Micro-  
computer  
+
SW2  
COMP.  
I2 adjustment  
SW1  
I2  
(SW1 and SW2 are active high)  
Watchdog timer  
Watchdog filter (f-duty converter)  
R1  
510 k  
Tadj  
8
2
R2  
750 k  
Normal range  
W.D out  
duty (%)  
P-RUN  
n
W.D in  
W.D out  
duty n%  
1/2 frequency  
divider  
fL/2  
fH/2  
duty 50%  
W.D in frequency (Hz)  
CF  
3
ACC  
7
PULSE from I/O port  
0.01 µ  
Operating: "Low"  
Standby: "High"  
Mode  
ACC Voltage  
Function  
Operating  
Standby  
Low  
Low voltage detection and WDT  
Low voltage detection  
High  
Note: The power-on reset circuit operates in both operating and standby modes.  
The HA16117F consists of a low voltage detector, power-on and auto-reset circuit, and watchdog timer.  
Low Voltage Detector  
Uses a reference voltage source (1.25 V) and high-precision comparator to detect drops in the supply  
voltage.  
Power-On and Auto-Reset Circuit  
Generates the RES waveform, using a multivibrator consisting of a current source I1 that charges the  
external capacitor CR, a current source I2 that discharges CR, and a comparator.  
3
 复制成功!