LOW VOLTAGE DETECTOR
R3111x SERIES NO. EA-056-061205
1
OUTLINE
The R3111 series are CMOS-based voltage detector ICs with high detector threshold accuracy and ultra-low
supply current, which can be operated at an extremely low voltage and is used for system reset as an example.
Each of these ICs consists of a voltage reference unit, a comparator, resistors for detector threshold setting,
an output driver and a hysteresis circuit. The detector threshold is fixed with high accuracy internally and does
not require any adjustment.
Three output types, Nch open drain type and CMOS type are available.
The R3111 Series are operable at a lower voltage than that for the RX5VL series, and can be driven by a
single battery.
Six types of packages, TO-92, SOT-89, SOT-23-3, SOT-23-5, SC-82AB, and SON1612-6 are available.
FEATURES
• Ultra-low Supply Current ...................................................... Typ. 0.8µA (VDD=1.5V)
• Wide Range of Operating Voltage........................................ 0.7V to 10.0V (Topt=25°C)
• Detector Threshold............................................................... Stepwise setting with a step of 0.1V in the range
of 0.9V to 6.0V is possible.
• High Accuracy Detector Threshold....................................... ±2.0%
• Low Temperature-Drift Coefficient of Detector Threshold .... Typ. ±100ppm/°C
• Two Output Types ................................................................ Nch Open Drain and CMOS
• Six Types of Packages ......................................................... TO-92, SOT-89(Mini-power Mold), SOT-23-3,
SOT-23-5 (Mini-mold), SC-82AB,SON1612-6
APPLICATIONS
• CPU and Logic Circuit Reset
• Battery Checker
• Window Comparator
• Wave Shaping Circuit
• Battery Back-up Circuit
• Power Failure Detector
R3111x
2
BLOCK DIAGRAMS
R3111xxxxA R3111xxxxC
VDD
OUT
GND
Vref
VDD
OUT
GND
Vref
R3111xxxxB
TIMING CHART
R3111XXX1A/C
tPLH
Supply V oltage
Output V oltage
(OUT)
Minimum Operating Voltage
VSS
VSS
Detector Threshold
Hysteresis
(VDD)
Release V oltage +VDET
Detector Threshold -VDET
V
VV
VDD
DDDD
DD
Vref
VrefVref
Vref
OUT
OUTOUT
OUT
GND
GNDGND
GND
+
-
R3111x
3
R3111XXX1B
DEFINITION OF OUTPUT DELAY TIME
Output Delay Time tPLH/tPHL is defined as follows:
1. In the case of Nch Open Drain Output:(R3111XXXXA/B)
Under the condition of the output pin (OUT) is pulled up through a resistor of 470kΩ to 5V, the time interval
between the rising edge of VDD pulse from 0.7V to (+VDET)+ 2.0V and becoming of the output voltage to 2.5V.
2. In the case of CMOS Output:(R3111XXXXC)
The time interval between the rising edge of VDD pulse from 0.7V to (+VDET)+ 2.0V and becoming of the output
voltage to (VDD/2) V.
+V
DET
+ 2.0V
5.0V
2.5V
0.7V
Input V oltage
(V
DD
)
Output V oltage
GND
GND tPHL tPLH
+VDET + 2.0V
+VDET+2.0V
+VDET+2.0V
0.7V
Input V oltage
(VDD)
Output V oltage
GND
2
GND t
PHL
t
PLH
Nch Open Drain Output(R3111XXXXA) CMOS Output(R3111XXXXC)
Released Volta
g
e
(
+V
DET
)
Supply Voltage
Detector Threshol
d
(
-VDET
)
(V
DD
)
VDDL
Output Voltage
(
VOUT
)
VDDL
Minimum Operating Voltage
t
p
LH
tPHL
Detector Threshold
Hysteresis
R3111x
4
Nch Open Drain Output (R3111XXXXB)
SELECTION GUIDE
The package type, the detector threshold, the output type and the taping type of R3111 Series can be
designated at the users’ request by specifying the part number as follows;
R3111xxxxx-xx ←Part Number
↑ ↑ ↑ ↑ ↑
a b c d e
Code Descriptions
a
Designation of Package Type;
E: TO-92 Q: SC-82AB
H: SOT-89 N: SOT-23-5 / SOT-23-3 D: SON1612-6
b Setting Detector Threshold (−VDET);
Stepwise setting with a step of 0.1V in the range of 0.9V to 6.0V is possible.
c Designation of Package Type
1: except SOT-23-3 2: SOT-23-3
d
Designation of Output Type;
A: Nch Open Drain(Output "L" at VDD=-Vdet)
B: Nch Open Drain(Output "H" at VDD=-Vdet)
C: CMOS (Output "L" at VDD=-Vdet)
e
Designation of Packing or Taping Type;
Ex.TO-92: TZ, SOT-89: T1, SOT-23-3, SOT-23-5, SC-82AB, SON1612-6: TR
prescribed as standard directions.
(Refer to Taping Specifications.) Antistatic bag for samples: C
+V
DET
+2.0V
0.7V
GND
5.0V
2.5V
GN
Output
Voltage
Input Voltage
(V
DD
)
tp LH tp
HL
R3111x
5
PIN CONFIGURATION
TO-92 SOT-89 SOT-23-3 SOT-23-5 SC-82AB SON1612-6
123
(mark side)
123
(mark side)
12
3
(mark side)
123
54
(mark side)
43
12
(mark side)
123
654
PIN DESCRIPTION
TO-92 SOT-89 SOT-23-3 SOT-23-5 SC-82AB
Pin No. Symbol Pin No. Symbol Pin No. Symbol Pin No. Symbol Pin No. Symbol
1 VDD 1 OUT 1 OUT 1 OUT
1 OUT
2 GND
2 VDD 2 GND 2 VDD 2 VDD
3 OUT
3 GND 3 VDD 3 GND
3 NC
4 NC
4 GND
5 NC
SON1612-6
Pin No. Symbol
1 OUT
2 VDD
3 GND
4 NC
5 VDD
6 NC
R3111x
6
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VDD Supply Voltage 12 V
VOUT1 Output Voltage (CMOS) VSS−0.3 to VDD+0.3 V
VOUT2 Output Voltage (Nch) VSS−0.3 to 12 V
IOUT Output Current 70 mA
PD Power Dissipation 1∗Note1 300 mW
PD Power Dissipation 2∗Note2 150 mW
PD Power Dissipation 3∗Note3 500 mW
Topt Operating Temperature Range −40 to 85 °C
Tstg Storage Temperature Range −55 to 125 °C
Tsolder Lead temperature (Soldering) 260°C, 10s
∗Note 1: applied to SOT-89 and TO-92 Single suspended in the air
∗Note 2: applied to SOT-23-3, SOT-23-5 and SC-82AB Single suspended in the air
∗Note 3: applied to SON1612-6 at mounted on board
PD depends on conditions of mounting on board. This specification is based on the measurement at
the condition below:
∗Measurement Conditions
Environment: Mounted on board (Wind velocity 0m/s)
Board Material: FR-4 (2-layer)
Board dimensions : 40mm x 40mm x t1.6mm
Copper Area: 50%
ELECTRICAL CHARACTERISTICS
R3111x09xA/C Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
−VDET Detector Threshold 0.882 0.900 0.918 V
VHYS Detector Threshold Hysteresis 0.027 0.045 0.063 V
ISS Supply Current VDD= 0.80V
2.90V 0.8
0.9
2.4
2.7 µA
VDDH Maximum Operating Voltage 10 V
Topt=25°C 0.55 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.65 0.80 V
Nch
VDS=0.05V, VDD=0.70V
VDS=0.50V, VDD=0.85V
0.01
0.05
0.05
0.50
mA
IOUT Output Current (Driver Output Pin)
Pch
VDS=−2.1V,VDD=4.5V
1.0
2.0 mA
tPLH Output Delay Time∗Note2 100
µs
∆−VDET/∆T Detector Threshold Temperature
Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
R3111x
7
R3111x18xA/C Topt=25°C
Symbol Item Conditions Min. Typ. Max. U=
==
=nit
−VDET Detector Threshold 1.764 1.800 1.836 V
VHYS Detector Threshold Hysteresis 0.054 0.090 0.126 V
ISS Supply Current VDD= 1.70V
3.80V 0.8
1.0
2.4
3.0 µA
VDDH Maximum Operating Voltage 10 V
Topt=25°C 0.55 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.65 0.80 V
Nch
VDS=0.05V, VDD=0.70V
VDS=0.50V, VDD=0.85V
0.01
1.00
0.05
2.00
mA
IOUT Output Current (Driver Output Pin)
Pch
VDS=−2.1V, VDD=4.5V
1.0
2.0 mA
tPLH Output Delay Time∗Note2 100
µs
∆−VDET/∆T Detector Threshold Temperature
Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
R3111x27xA/C Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
−VDET Detector Threshold 2.646 2.700 2.754 V
VHYS Detector Threshold Hysteresis 0.081 0.135 0.189 V
ISS Supply Current VDD= 2.60V
4.70V 0.9
1.1
2.7
3.3 µA
VDDH Maximum Operating Voltage 10 V
Topt=25°C 0.55 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.65 0.80 V
Nch
VDS=0.05V, VDD=0.70V
VDS=0.50V,VDD=1.50V
0.01
1.00
0.05
2.00
mA
IOUT Output Current (Driver Output Pin)
Pch
VDS=−2.1V, VDD=4.5V
1.0
2.0 mA
tPLH Output Delay Time∗Note2 100
µs
∆−VDET/∆T Detector Threshold Temperature
Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
R3111x
8
R3111x36xA/C Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
−VDET Detector Threshold 3.528 3.600 3.672 V
VHYS Detector Threshold Hysteresis 0.108 0.180 0.252 V
ISS Supply Current
VDD= 3.47V
5.60V 1.0
1.2
3.0
3.6 µA
VDDH Maximum Operating Voltage 10 V
Topt=25°C 0.55 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.65 0.80 V
Nch
VDS=0.05V, VDD=0.70V
VDS=0.50V, VDD=1.50V
0.01
1.00
0.05
2.00
mA
IOUT Output Current (Driver Output Pin)
Pch
VDS=−2.1V, VDD=4.5V
1.0
2.0 mA
tPLH Output Delay Time∗Note2 100
µs
∆−VDET/∆T Detector Threshold Temperature
Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
R3111x45xA/C Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
−VDET Detector Threshold 4.410 4.500 4.590 V
VHYS Detector Threshold Hysteresis 0.135 0.225 0.315 V
ISS Supply Current VDD= 4.34V
6.50V 1.1
1.3
3.3
3.9 µA
VDDH Maximum Operating Voltage 10 V
Topt=25°C 0.55 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.65 0.80 V
Nch
VDS=0.05V, VDD=0.70V
VDS=0.50V, VDD=1.50V
0.01
1.00
0.05
2.00
mA
IOUT Output Current (Driver Output Pin)
Pch
VDS=−2.1V, VDD=8.0V
1.5
3.0 mA
tPLH Output Delay Time∗Note2 100
µs
∆−VDET/∆T Detector Threshold Temperature
Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
R3111x
9
R3111x54xA/C Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
−VDET Detector Threshold 5.292 5.400 5.508 V
VHYS Detector Threshold Hysteresis 0.162 0.270 0.378 V
ISS Supply Current VDD= 5.20V
7.40V
1.2
1.4
3.6
4.2 µA
VDDH Maximum Operating Voltage 10 V
Topt=25°C 0.55 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.65 0.80 V
Nch
VDS=0.05V, VDD=0.70V
VDS=0.50V, VDD=1.50V
0.01
1.00
0.05
2.00
mA
IOUT Output Current
(Driver Output Pin) Pch
VDS=−2.1V, VDD=8.0V
1.5
3.0 mA
tPLH Output Delay Time∗Note2 100
µs
∆−VDET/∆T Detector Threshold Temperature
Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
∗Note1:
Minimum operating voltage means the value of input voltage when output voltage maintains 0.1V or less. (In
the case of Nch Open Drain Output type, the output pin is pulled up with a resistance of 470k
Ω
to 5.0V.)
∗Note2: In the case of CMOS Output type: The time interval between the rising edge of VDD input pulse from 0.7V
to (+VDET)+2.0V and output voltage level becoming to VDD/2.
In the case of Nch Open Drain Output type: the output pin is pulled up with a resistance of 470kΩ to
5.0V, The time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output
voltage level becoming to 2.5V.
R3111Q231B Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
−VDET Detector Threshold 2.254 2.300 2.346 V
VHYS Detector Threshold Hysteresis 0.069 0.115 0.161 V
ISS Supply Current VDD=2.20V
4.30V 0.9
1.1
2.7
3.3 µA
VDDH Maximum Operating Voltage 10 V
Topt=25°C 0.55 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.65 0.80 V
IOUT Output Current (Driver Output Pin) Nch
VDS=0.50V,VDD=3.00V 10 mA
PLH Output Delay Time∗Note2 100
µs
∆−VDET/∆T Detector Threshold Temperature
Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
R3111x
10
R3111Q441B Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
−VDET Detector Threshold 4.312 4.400 4.488 V
VHYS Detector Threshold Hysteresis 0.132 0.220 0.308 V
ISS Supply Current VDD= 4.24V
6.40V 1.1
1.3
3.3
3.9 µA
VDDH Maximum Operating Voltage 10 V
Topt=25°C 0.55 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.65 0.80 V
IOUT Output Current (Driver Output Pin) Nch
VDS=0.50V, VDD=5.50V 18 mA
tPLH Output Delay Time∗Note2 100
µs
∆−VDET/∆T Detector Threshold Temperature
Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/°C
∗Note1:
Minimum operating voltage means the value of input voltage when output voltage maintains 0.1V or less. (In
the case of Nch Open Drain Output type, the output pin is pulled up with a resistance of 470k
Ω
to 5.0V.)
∗Note2: In the case of CMOS Output type: The time interval between the rising edge of VDD input pulse from 0.7V
to (+VDET)+2.0V and output voltage level becoming to VDD/2.
In the case of Nch Open Drain Output type: the output pin is pulled up with a resistance of 470kΩ to
5.0V, The time interval between the rising edge of VDD input pulse from 0.7V to (+VDET)+2.0V and output
voltage level becoming to 2.5V.
OPERATION
V
DD
OUT
GND
Vref
Ra
Rb
Rc
Pch
Nch
Comparator
Figure 1. Block Diagram (R3111XXXXC)
R3111x
11
t
PLH
Supply V oltage
(V
DD
)
Output V oltage
(V
OUT
)
Released V oltage(+V
DET
)
Detector Threshold(-V
DET
)
Detector Threshold
Hysteresis
12 3 4 5
A
B
Minimum Operating Voltage
GND
GND
Step 1 2 3 4 5
Comparator
Pin Input Voltage I II III IV V
Comparator
Output H L Inde-finite L H
Tr.1 OFF ON Inde-finite ON OFF
Pch ON OFF Inde-finite OFF ON
Output
Tr. Nch OFF ON Inde-finite ON OFF
Rb + Rc
I. Ra + Rb + Rc × VDD
Rb
II. Ra + Rb × VDD
Figure 2. Operation Diagram
Step 1. The output voltage is equal to the supply voltage (VDD).
Step 2. At Point “A”, Vref
>
=
VDD×(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reverse,
and output voltage becomes to GND level. The voltage level of Point A means detector threshold voltage,
or (−VDET).
Step 3. When the supply voltage is less than minimum operating voltage, the operation of output transistor
becomes indefinite, and in the case that output is pulled up to VDD, the output voltage equals to VDD
voltage.
Step 4. The output voltage equals to GND level.
Step 5. At Point “B”, Vref
>
=
VDD×Rb/(Ra+Rb) is true, Output of the comparator is reverse, and output voltage is
equal to the supply voltage, or (VDD). The voltage level of Point B means released voltage, or (+VDET).
∗ The difference between released voltage and detector threshold voltage is the detector threshold hysteresis.
Figure 3. Block Diagram (R3111XXXXB)
Vref
GND
OUT
+
-
Ra
Rb
Rc
Operational Amplifier
N
ch
VDD
R3111x
12
Step 1 2 3 4 5
Comparator
Pin Input Voltage I II III IV V
Comparator
Output H L Indefinite L H
Tr.1 OFF ON Indefinite ON OFF
Output
Tr. Nch OFF ON Indefinite ON OFF
Rb + Rc
I. Ra + Rb + Rc × VDD
Rb
II. Ra + Rb × VDD
Figure 4. Operation Diagram
Supposed that OUT pin is pulled-up to VDD,
Step 1. The output voltage is equal to the supply voltage (VDD).
Step 2. At Point “A”, Vref
>
=
VDD×(Rb+Rc)/(Ra+Rb+Rc) is true, as a result, the output of comparator is reverse,
and output voltage becomes to Pull-up level. The voltage level of Point A means detector threshold
voltage, or (−VDET).
Step 3. When the supply voltage is less than minimum operating voltage, the operation of output transistor
becomes indefinite, and in the case that output is pulled up to VDD, the output voltage equals to the
pulled-up VDD voltage.
Step 4. The output voltage equals to pulled-up VDD level.
Step 5. At Point “B”, Vref
>
=
VDD×Rb/(Ra+Rb) is true, Output of the comparator is reverse, and output voltage is
equal to the GND after tpHL. The voltage level of Point B means released voltage, or (+VDET).
∗ The difference between released voltage and detector threshold voltage is the detector threshold hysteresis.
TEST CIRCUITS
I
SS
V
DD
OUT
GND
V
IN
R3111
X
Series
R3111
X
Series
V
DD
V
OUT
5.0V
OUT
GND
V
IN
470k
Pull-up circuit is not necessary for
CMOS Output type, or R3111xxxxC.
Supply Current Test Circuit Detector Threshold Test Circuit
1 234 5
Release (+V
DET）
Supply
Voltage Detector
Threshold (-V DET )
(V
DD
)
GND
Output Voltage
(VOUT)
GND
Minimum Operating Voltage
tp
LH
ｔ
ｔｔ
ｔPH
PHPH
PH
L
L
L
L
Detector Threshold
Hysteresis
A
B
R3111x
13
V
DD
V
DS
OUT
I
OUT
GND
V
IN
R3111
X
Series
R3111
X
Series
V
DD
V
DD-
V
DS
V
DS
OUT
I
OUT
GND
V
IN
∗Apply to CMOS Output type only
Nch Driver Output Current Test Circuit Pch Driver Output Current Test Circuit
VDD
VSS
VSS OUT OUT
GND
P.G. R3111XXXXA
Series
470k
COUT
+5.0V
0.7V
ROUT
+VDET+2.0V
OUT
P.G. V
DD
V
SS
V
SS
OUT
GND
R3111
XXXX
A
Series
470k
100k
C
IN
+5.0V
0.7V
R
OUT
R
IN
+V
DET
+2.0V
Output Delay Time Test Circuit (1) Output Delay Time Test Circuit (2)
TYPICAL CHARACTERISTICS
1) Supply Current vs. Input Voltage
R3111x09xC R3111x27xC
Topt=85°C
25°C
-40°C
2.5
2.0
1.5
1.0
0.5
0.0
Input Voltage VIN(V)
0246810
Supply Current ISS(µA)
Topt=85°C
25°C
-40°C
2.0
1.5
1.0
0.5
0.0
Input Voltage VIN(V)
0246810
Supply Current ISS(µA)
R3111x
14
R3111x45xC
Topt=85°C
25°C
-40°C
2.0
1.5
1.0
0.5
0.0
Input Voltage VIN(V)
0246810
Supply Current ISS(µA)
2) Detector Threshold Hysteresis vs. Temperature
R3111x09xC R3111x27xC
+VDET
-VDET
1.00
0.98
0.96
0.94
0.92
0.90
0.88
0.84
0.86
Temperature Topt(°C)
-60 0 20 40 60 80-40 -20 100
Detector Threshold -VDET(V)
2.9
2.8
2.7
2.6
2.5
+VDET
-VDET
Temperature Topt(°C)
-60 0 20 40 60 80-40 -20 100
Detector Threshold -VDET(V)
R3111x45xC
4.8
4.7
4.6
4.5
4.4
+VDET
-VDET
Temperature Topt(°C)
-60 0 20 40 60 80-40 -20 100
Detector Threshold -VDET(V)
R3111x
15
3) Output Voltage vs. Input Voltage
R3111x09xC R3111x09xA
Topt=-40°C
25°C
85°C
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.0
0.2
Input Voltage VIN(V)
0 0.6 0.8 1 1.2 1.40.2 0.4 1.6
Output Voltage VOUT(V)
5V Pull-up 470kΩ
6
5
4
3
2
0
1
Input Voltage VIN(V)
0 0.6 0.8 1 1.2 1.40.2 0.4 1.6
Output Voltage VOUT(V)
Topt=-40°C
25°C
85°C
R3111x27xC R3111x27xA
Topt=-40°C
25°C
85°C
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.0
0.5
Input Voltage VIN(V)
0 1.5 2 2.5 3 3.50.5 1 4
Output Voltage VOUT(V)
5V Pull-up 470kΩ
6
5
4
3
2
0
1
Input Voltage VIN(V)
0 1.5 2 2.5 3 3.50.5 1 4
Output Voltage VOUT(V)
Topt=-40°C
25°C
85°C
R3111x45xC R3111x45xA
Topt=-40°C
25°C
85°C
6
5
4
3
2
0
1
Input Voltage VIN(V)
0231654
Output Voltage VOUT(V)
5V Pull-up 470kΩ
6
5
4
3
2
0
1
Input Voltage VIN(V)
0231654
Output Voltage VOUT(V)
Topt=-40°C
25°C
85°C
R3111x
16
4) Nch Driver Output Current vs. VDS
R3111x09xC R3111x09xC
Topt=25°C
VDD=0.85V
0.7V
700
600
500
400
300
200
0
100
VDS(V)
0 0.2 0.4 0.6 0.8
Output Current IOUT(µA)
VDD=0.8V
0.7V
Topt=25°C
300
250
200
150
100
0
50
VDS(V)
0 0.02 0.04 0.06 0.08 0.1
Output Current IOUT(µA)
R3111x27xC R3111x27xC
Topt=25°C
VDD=2.5V
2.0V
1.5V
20
18
14
16
12
10
8
6
4
0
2
VDS(V)
0 0.5 1 1.5 2 2.5
Output Current IOUT(mA)
VDD=0.8V
0.7V
Topt=25°C
300
250
200
150
100
0
50
VDS(V)
0 0.02 0.04 0.06 0.08 0.1
Output Current IOUT(µA)
R3111x45xC R3111x45xC
Topt=25°C
VDD=4.5V
4.0V
3.5V
3.0V
2.5V
2.0V
1.5V
60
50
40
30
20
0
10
VDS(V)
0 0.5 1 1.5 2 2.5 3 43.5 4.5
Output Current IOUT(mA)
VDD=0.8V
0.7V
Topt=25°C
300
250
200
150
100
0
50
VDS(V)
0 0.02 0.04 0.06 0.08 0.1
Output Current IOUT(µA)
R3111x
17
5) Nch Driver Output Current vs. Input Voltage
R3111x09xC R3111x27xC
900
800
700
600
500
400
300
200
0
100
Input Voltage V
IN
(V)
0 0.2 0.4 0.6 10.8
Output Current I
OUT
(mA)
Topt=-85°C
25°C
-40°C
14
12
10
8
6
4
0
2
Input V oltage V
IN
(V)
0 0.5 1 1.5 1 2.5 3
Output Current I
OUT
(mA)
Topt=-40°C25°C
85°C
R3111x45xC
25
20
15
10
5
0
Input V oltage V
IN
(V)
0123456
Output Current I
OUT
(mA)
Topt=-40°C
25°C
85°C
6) Pch Driver Output Current vs. Input Voltage
R3111x09xC R3111x27xC
Topt=25°C
V
DS
=0.7V
0.5V
1.4
1.2
1.0
0.8
0.6
0.4
0.0
0.2
Input V oltage V
IN
(V)
02468
Output Current I
OUT
(mA)
Topt=25°C
V
DS
=2.1V
1.5V
0.5V
1.0V
3.5
3.0
2.5
2.0
1.5
1.0
0.0
0.5
Input V oltage V
IN
(V)
012 43657
Output Current I
OUT
(mA)
R3111x
18
R3111x45xC
Topt=25°C
V
DS
=2.1V
1.5V
0.5V
1.0V
4.5
3.5
4.0
3.0
2.5
2.0
1.5
1.0
0.0
0.5
Input V oltage V
IN
(V)
024 8610
Output Current I
OUT
(mA)
7) Output Delay Time vs. Load Capacitance
R3111x09xA R3111x27xA
tPLH
tPHL
100
10
1
0.1
0.01
0.001
Load Capacitance COUT(µF)
0.0001 0.010.001 0.1
Output Delay Time tP(ms)
tPLH
tPHL
100
10
1
0.1
0.01
0.001
Load Capacitance COUT(µF)
0.0001 0.010.001 0.1
Output Delay Time tP(ms)
R3111x45xA
tPLH
tPHL
100
10
1
0.1
0.01
0.001
Load Capacitance COUT(µF)
0.0001 0.010.001 0.1
Output Delay Time tP(ms)
R3111x
19
8) Output Delay Time vs. Input Pin Capacitance
R3111x09xA R3111x27xA
tPHL
tPLH
100
10
1
0.1
0.01
0.001
Input Pin Capacitance CIN(µF)
0.0001 0.010.001 0.1
Output Delay Time tP(ms)
tPLH
tPHL
100
10
1
0.1
0.01
0.001
Input Load Capacitance CIN(µF)
0.0001 0.010.001 0.1
Output Delay Time tP(ms)
R3111x45xA
tPLH
tPHL
100
10
1
0.1
0.01
0.001
Input Pin Capacitance CIN(µF)
0.001 0.10.01 1
Output Delay Time tP(ms)
TYPICAL APPLICATIONS
R3111xxxxA CPU Reset Circuit (Nch Open Drain Output)
Case 1. Input Voltage to R3111xxxxA is equal to
Input Voltage to CPU
Case 2. Input Voltage to R3111xxxxA is unequal to
Input Voltage to CPU
VDD
VDD
VDD
OUT
GND
GND
R3111XXXXA
SERIES
470k CPU
RESET
R
V
DD
V
DD2
V
DD
V
DD1
OUT
GND
GND
R3111
XXXX
A
SERIES
CPU
RESET
R
470k
R3111x
20
R3111xxxxA CPU Reset Circuit CMOS Output
VDD
VDD
VDD
OUT
GND
GND
R3111XXXXC
SERIES
CPU
RESET
R3111xxxxA Output Delay Time Circuit 1
(Nch Open Drain Output)
R3111xxxxA Output Delay Time Circuit 2
(Nch Open Drain Output)
VDD
VDD
VDD
OUT
GND
GND
R3111XXXXA
SERIES
CPU
RESET
R
470k
VDD V
DD
V
DD
OUT
GND
GND
R3111
XXXX
A
SERIES CPU
RESET
R2R1 470k
100k
Memory Back-up Circuit
V
DD
V
DD
OUT
R3111
XXXX
C
SERIES
D1 V
CC
GND
GND
A
B
G
Y1
Y2
Y3
Y4
D2 V
CC
GND CS
V
CC
GND CS
V
CC
GND CS
V
CC
GND CS
RAM1 RAM2 RAM3 RAM4
Voltage level Indicator Circuit (lighted when the power runs out)
(Nch Open Drain Output)
V
DD
V
DD
OUT
GND
R3111
XXXX
A
SERIES
R3111x
21
Detector Threshold Adjustable Circuit
(Nch Open Drain Output)
VDD
VDD
OUT
GND
R3111XXXXA
SERIES
C+
Ra
Rb
Adjusted Detector Threshold
=(−VDET)∗(Ra+Rb)/Rb
Hysteresis Voltage
=(VHYS)∗(Ra+Rb)/Rb
∗) If the value of Ra is set excessively large, voltage
drop may occur caused by the supply current of IC
itself, and detector threshold may vary.
Window Comparator Circuit
(Nch Open Drain Output)
V
DD
V
DD
V
DD
OUT
OUT
OUT GND
GND
R3111
XXXX
A
SERIES
R3111
XXXX
A
SERIES V
DET
2
V
DET
1
V
DD
V
SS
V
SS
OUT
V
DET
2
V
DET
1
Over-charge Preventing Circuit
V
DD
OUT
GND
R3111
XXXX
C
SERIES
Light R1 R2 R4
R3
D1
Solar Battery
Load
R3111x
22
TECHNICAL NOTES
V
DD
V
DD
OUT
GND
R3111
SERIES
R
V
DD
V
DD
OUT
GND
R1
R2
R3111
SERIES
Figure 9 Figure 10
1. In Figure 9, When R3111xxxxC is used, and if an impedance is connected between Voltage Supplier
and the VDD Pin of R3111xxxxC Series, the operation might be unstable by cross conduction current at
detection.
When R3111xxxxA/B is used in Figure 9, if the value of R is set excessively large, voltage drop may
occur caused by supply current of IC itself and Detector threshold may vary.
2. Wiring as shown in Figure 10 may cause the oscillation in both output types of R3111 Series.
