參數(shù)資料
型號： HA16117FPC
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)： 3/31頁
文件大小： 249K
代理商： HA16117FPC
HA16117F Series
3
Block Diagram
1
6
5
8
2
3
7
+
4
+
5 V
0.1
μ
V
CC
GND
C
R
Tadj
R
510 k
R
750 k
P-RUN
1/2 frequency
divider
0.01
μ
C
F
ACC
PULSE from I/O port
W.D in
SW2
≈
1.25 V
2.52 (117FA)
2.36 (117FB)
2.20 (117FC)
SW1
COMP.
COMP.
to Micro-
computer
RES
W.D in frequency (Hz)
duty 50%
W.D out
W.D out
duty (%)
duty n%
GND
1
Operating: "Low"
Standby: "High"
n
f
L
/2
f
H
/2
Normal range
I
2
I
2
adjustment
I
1
Power-on and auto-reset circuit
(*I
1
< I
2
)
(SW1 and SW2 are active high)
Watchdog timer
Watchdog filter (f-duty converter)
Low voltage detector
ACC Voltage
Low
High
Function
Low voltage detection and WDT
Low voltage detection
Mode
Operating
Standby
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 I
1
that charges the
external capacitor C
R
, a current source I
2
that discharges C
R
, and a comparator.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HA16117FPCJ 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:CMOS Watchdog Timer
HA16117FSERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HA16120 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Switching Regulator for Chopper Type DC/DC Converter
HA16120FP 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Switching Regulator for Chopper Type DC/DC Converter
HA16120FP-E 制造商:Renesas Electronics 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3.9V to 40V Input 16-Pin SOP 制造商:Renesas Electronics 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3.9V to 40V Input 16-Pin SOP Bulk 制造商:Renesas Electronics Corporation 功能描述:Power Sup,SW Reg.Control IC,Boost,DIP16
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