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參數(shù)資料
| 型號： | HA16129FPJ |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Single Watchdog Timer |
| 中文描述： | 單看門狗定時器 |
| 文件頁數(shù)： | 4/24頁 |
| 文件大?。?/td> | 135K |
| 代理商： | HA16129FPJ |
HA16129FPJ
4
Pin Function
Related
Function
Pin
No.
Symbol
Function
WDT.
1
P-RUN
Watchdog timer pulse input. The auto-reset function is controlled by the
duty cycle or frequency of this input pulse signal.
2
Rf
The resistor connected to this pin determines the current that flows in the
Cf pin capacitor. Use the resistor value from 100 k
to 500 k
3
Cf
The current determined by the Rf pin charges the Cf capacitor and the
potential on this pin determines the watchdog timer frequency band.
t
RH
, t
RL
, t
OFF
4
R
R
The resistor connected to this pin determines the current that flows in the
C
R
pin capacitor. Use the resistor value from 100 k
to 500 k
The current determined by the R
pin charges the capacitor C
R
and the
potential on this pin controls the
RES
function (toff, t
RH
, and t
RL
).
The resistor R
, which determines only the time t
for the
RES
function is
connected to this pin. This resistor determines the current that charges the
capacitor C
R
for the time t
ON
. Use the resistor value from 100 k
to 500 k
The current determined by the Rf pin charges the capacitor C
, and the
RES
delay times (Tr and T
RES
) are determined by the potential of this
capacitor.
5
C
R
t
ON
6
R
T
tr, t
RES
7
C
RES
—
8
GND
Ground
Vout
9
Voadj
Insert the resistor Roadj if fine adjustment of the regulator output voltage
Vout is required. Leave this pin open if Vout does not need to be changed.
Output
10
OUTE
Output for the OUTE function
Power
supply
11
V
CC
Power supply
Current
limiter
12
CS
Current limiter current detection. Connect the overcurrent detection
resistor between the CS pin and the V
pin. If this function is not used,
short this pin to V
. Also, connect this pin to the emitter of the external
transistor. (This function can not operate when V
OUT
< 2 V)
Connect this pin to the base of the external transistor.
Vout
13
CONT
14
V
OUT
Provides the regulator output voltage and the IC internal power supply.
Connect this pin to the collector of the external transistor.
This pin senses the
NMI
detection voltage. If V
is to be detected,
connect this pin to the V
pin (however, note that an external resistor is
required), and if Vout is to be detected, connect this pin to the V
OUT
pin.
Insert a resistor if fine adjustment of the
NMI
detection voltage is required.
Leave this pin open if fine adjustment is not required.
NMI
output
RES
output
Insert a resistor if fine adjustment of the
STBY
detection voltage is
required. Leave this pin open if fine adjustment is not required.
STBY
output
NMI
15
NMIsns
16
NMIadj
Output
17
NMI
RES
Output
STBY
18
19
STBYadj
Output
20
STBY
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