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R5105N231C-TR-F

更新时间： 2023-01-03 06:20:10
品牌 Logo 应用领域
理光 - RICOH 光电二极管
页数 文件大小 规格书
2页 248K
描述
Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO6, ROHS COMPLIANT, SOT-23, 6 PIN

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R5105N231C-TR-F 数据手册

 浏览型号R5105N231C-TR-F的Datasheet PDF文件第2页 
R5105N Series  
Compact Watchdog Timer with VD  
The R5105N Series are CMOS-based system power ICs with a voltage detector (VD) and watchdog timer (WDT) integrated in a single  
chip. R5105N monitors the power system of devices equipped with microprocessors and prevents system runaway with a reset  
signal when a malfunction occurs. The output delay time of the VD and watchdog timeout period/reset time can be adjusted high  
accuracy with an external capacitor.  
FEATURES  
• Supply Current (ISS) ························Typ. 11μA (VDD=-VDET+0.5V,  
Clock pulse input)  
• Operating Voltage Range (VDD) ······0.9V to 6.0V  
(VD Section)  
• Output Delay Time (tPLH)················· Typ. 370ms (CD=0.1μF)  
<
• Output Delay Time Accuracy·········· ± 16% (-40°C Topt 105°C)  
=
=
(WDT Section)  
• Watchdog Timeout Period (tWD)······ Typ. 310ms (CTW=0.1μF)  
•
•
•
Detector Threshold Range (-VDET  
Detector Threshold Accuracy ··········± 1%  
Temp. coeff. of Detector Threshold ···Typ. ± 100ppm/°C  
)
···1.5V to 5.5V (internally fixed)  
• Reset Hold Time of WDT (tWR) ······· Typ. 34ms (CTW=0.1μF)  
<
•
Watchdog Timeout Period Accuracy···· ± 33% (-40°C Topt 105°C)  
• Package ········································· SOT-23-6  
=
=
°
°
°
(The above shows specification at Topt=25 C. Design assurance value at -40 C  
Topt  
105 C is also available. For details, please refer to the datasheet.)  
=
=
BLOCK DIAGRAMS  
TYPICAL APPLICATION  
R5105Nxx1A  
R5105Nxx1C  
(Nch. open drain output)  
(CMOS output)  
Power Supply  
Microprocessor  
VDD  
3
6
3
6
VDD  
CD  
VDD  
CD  
R
3
6
VDD  
RESETB  
R5105Nxx1A  
4
1
RESET  
I/O  
Vref2  
Vref2  
Vref1  
Vref1  
5
1
5
1
GND  
SCK  
GND  
SCK  
2
4
2
4
CTW  
CTW  
Series  
SCK  
WATCHDOG  
TIMER  
CLOCK  
DETECTOR  
WATCHDOG  
TIMER  
CLOCK  
DETECTOR  
CD  
CTW  
2
GND  
5
CD  
CTW  
RESETB  
RESETB  
SELECTION GUIDE  
.
xx.  
: Specify the detector threshold within the range 1.5V (  
in 0.1V steps.  
.
15  
.
)
to 5.5V  
(.  
55  
.
)
Package  
Quantity per Reel  
Part No.  
SOT-23-6  
3,000 pcs  
R5105N  
.
xx.  
1.  
∗-TR-F  
: Select the output type from (  
.
A
.
) Nch. open drain or (  
.
C
.
) CMOS.  
.
∗
PACKAGE (Top View)  
TIMING CHART  
SOT-23-6  
6
5
4
+VDET  
V
DD  
-VDET  
tPHL  
tPHL  
V
V
CD  
+VTCD  
-VTCD  
1
2
3
tWD  
tWDI  
Vref2H  
1
2
SCK  
CTW  
VDD  
Watchdog timer clock input pin  
CTW  
Ext. Cap. pin for setting reset and  
watchdog timeout period of WDT  
Power supply pin  
Vref2L  
3
4
5
RESETB Output pin for Reset "L" signal  
tPLH  
tPLH  
GND  
Ground pin  
V
SCK  
Ext. Cap. pin for setting output  
delay time of VD  
6
CD  
tWR  
V
RESETB  
APPLICATION  
∗tPHL : Output delay time  
∗tWDI : tWD/10 (SCK pulses input during this period are ignored.)  
• Monitoring of the power system of devices equipped with microprocessors  
No.EK-159-091101  
CMOS Microprocessor Supervisory  
12

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