Low Voltage Detector with Built-in
Delay Circuit
51[[[$& 51[[[$&
1
NO. EA-073-0301
OUTLINE
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FEATURES
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9
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R3130NxxxA/C, R3131NxxxA/C
2
APPLICATIONS
&38 /RJLF &LUFXLW 5HVHW
%DWWHU\ &KHFNHU
:LQGRZ &RPSDUDWRU
:DYH 6KDSLQJ &LUFXLW
%DWWHU\ %DFN8S &LUFXLW
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BLOCK DIAGRAMS
R3130NxxxA
R3130NxxxC
Nch Open Drain Output
CMOS Output
V
DD
GND
OUT
Delay
Circuit
Vref
-
+
V
DD
GND
OUT
Delay
Circuit
Vref
-
+
R3131NxxxA
R3131NxxxC
Nch Open Drain Output
CMOS Output
OUT
Delay
Circuit
-
+
V
DD
GND
Vref
GND
OUT
Delay
Circuit
Vref
-
+
V
DD
R3130NxxxA/C, R3131NxxxA/C
3
TIMING CHART
V
SS
Tdelay
Supply
Voltage
(V
DD
)
Output Voltage
Detector
Threshold
Minimum Operating
Voltage
V
DET
V
SS
V
SS
Tdelay
Supply
Voltage
(V
DD
)
Output Voltage
Detector
Threshold
Minimum Operating
Voltage
V
DET
V
SS
R3130N Operation Diagram
R3131N Operation Diagram
Output Delay Operation
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,Q WKH FDVH RI 1FK RSHQ GUDLQ RXWSXW
7KH WLPH LQWHUYDO IURP ULVLQJ HGJH RI 9
''
SXOVH 9 9
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9 WR WKH WLPH DW ZKLFK WKH RXWSXW UHDFKHV
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,Q WKH FDVH RI &026 RXWSXW
7KH WLPH LQWHUYDO IURP ULVLQJ HGJH RI 9
''
SXOVH 9 9
'(7
9 WR WKH WLPH DW ZKLFK WKH RXWSXW UHDFKHV
9
''
V
DET
+1.0V
Input Voltage
Output Voltage
1.0V
5.0V
2.5V
GND
GND
Trst
Tdelay
(V
DD
)
V
DET
+1.0V
Input Voltage
Output Voltage
1.0V
V
DET
+1.0V
(V
DET
+1.0V)/2
GND
GND
Trst
Tdelay
(V
DD
)
Nch Open Drain Output
CMOS Output
R3130NxxxA/C, R3131NxxxA/C
4
SELECTION GUIDE
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Code
Contents
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PIN CONFIGURATION
SOT-23-3
MARK SIDE
3
1
2
R3130NxxxA/C, R3131NxxxA/C
5
PIN DESCRIPTION
Pin No.
Symbol
Description
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287
2XWSXW 3LQ
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ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
Unit
9
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9
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ABSOLUTE MAXIMUM RATINGS
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