參數(shù)資料
型號： HA16117FPCJ
廠商： Hitachi,Ltd.
英文描述： CMOS Watchdog Timer
中文描述： 看門狗定時器的CMOS
文件頁數(shù)： 2/31頁
文件大?。?/td> 249K
代理商： HA16117FPCJ
HA16117F Series
2
Ordering Information
The HA16117F Series includes three ICs with different low threshold levels (V
TL
).
Type No.
Low Threshold Voltage (V
TL
)
4.4 V Typ
HA16117FPA/FPAJ
HA16117FPB/FPBJ
4.2 V Typ
HA16117FPC/FPCJ
4.0 V Typ
Pin Arrangement
8
7
6
5
V
CC
P-RUN
C
F
C
R
1
2
3
4
Tadj
ACC
GND
RES
(Top view)
Pin Description
Pin No.
Symbol
Function
1
V
CC
P-RUN
Power supply voltage input
2
Watchdog timer (WDT) input
3
C
F
Connected capacitor C
determines WDT filter characteristic
(normal frequency range)
4
C
R
Connected capacitor C
R
determines t
ON
for power-on reset and t
OFF
, t
RH
,
and t
RL
for auto-reset
Reset signal output from WDT and voltage supervision circuits
5
RES
6
GND
Ground
7
ACC
WDT on/off control input (on when ACC is low)
8
Note:
Tadj *
For adjusting t
RH
and t
OFF
(divide V
CC
to get the adjustment voltage)
The low-voltage threshold cannot be modified by changing the external resistors connected to the
Tadj pin.
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