概述
数据手册R3111H291C 概述
LOW VOLTAGE DETECTOR 低电压检测
R3111H291C 数据手册
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LOW VOLTAGE DETECTOR
R3111xxx1A/C Series
■ OUTLINE
The R3111 Series are voltage detector ICs with high detector threshold accuracy and ultra-low supply current by CMOS
process, 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.
Two 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.
Four types of packages, TO-92, SOT-89, SOT-23-5 and SC-82AB are available.
■ FEATURES
●
●
●
Ultra-low Supply Current............................................................... TYP. 0.8µA (VDD=1.5V)
Wide Range of Operating Voltage.................................................. 0.7 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
Four Types of Packages.................................................................. TO-92, SOT-89(Mini-power Mold), SOT-23-5 (Mini-
mold), SC-82AB
■ APPLICATIONS
●
●
●
●
●
●
CPU and Logic Circuit Reset
Battery Checker
Window Comparator
Wave Shaping Circuit
Battery Back-up Circuit
Power Failure Detector
■ BLOCK DIAGRAMS
R3111XXX1A
R3111XXX1C
V
DD
V
DD
OUT
GND
OUT
GND
Vref
Vref
Rev.1.10
- 1 -
■ TIMING CHART
Release Voltage +VDET
Detector Threshold -VDET
Detector Threshold
Hysteresis
Supply Voltage
(VDD
)
Minimum Operating Voltage
VSS
Output Voltage
(OUT)
V
SS
t
PLH
■ DEFINITION OF OUTPUT DELAY TIME
Output Delay Time tPLH is defined as follows:
1. In the case of Nch Open Drain Output:
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:
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.
+VDET + 2.0V
+VDET + 2.0V
Input Voltage
(VDD
Input Voltage
(VDD
)
)
0.7V
GND
0.7V
GND
5.0V
+VDET+2.0V
Output Voltage
Output Voltage
+VDET+2.0V
2.5V
GND
2
GND
tPHL
tPLH
tPHL
tPLH
Nch Open Drain Output
CMOS Output
Rev.1.10
- 2 -
■ 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;
R3111×××1×-×× ←Part Number
↑ ↑ ↑ ↑
a b c d
Code
Contents
Designation of Package Type;
a
E: TO-92
H: SOT-89
Q: SC-82AB
N: SOT-23-5
Setting Detector Threshold (-VDET);
Stepwise setting with a step of 0.1V in the range of 0.9V to 6.0V is possible.
Designation of Output Type;
b
c
A: Nch Open Drain
C: CMOS
Designation of Packing or Taping Type ;
Ex.TO-92: TZ, SOT-89: T1,
SOT-23-5, SC-82AB: TR are prescribed as standard directions.
(Refer to Taping Specifications.) Antistatic bag for samples: C
d
Rev.1.10
- 3 -
■ PIN CONFIGURATION
●
●
●
●
TO-92
SOT-89
SOT-23-5
SC-82AB
4
3
5
4
(mark side)
(mark side)
(mark side)
1
2
(mark side)
1
2
3
1
2
3
1
2
3
■ PIN DESCRIPTION
●
●
●
●
TO-92
SOT-89
SOT-23-5
SC-2AB
Pin No.
Symbol
VDD
GND
OUT
Pin No.
Symbol
OUT
VDD
Pin No. Symbol
Pin No.
Symbol
OUT
VDD
NC
GND
1
2
3
1
2
3
1
2
3
4
5
OUT
VDD
GND
NC
1
2
3
4
GND
NC
■ ABSOLUTE MAXIMUM RATINGS
Symbol
VDD
Item
Rating
12
VSS-0.3 to VDD+0.3
Unit
V
V
Supply Voltage
VOUT1
VOUT2
IOUT
PD
PD
Output Voltage (CMOS)
Output Voltage (Nch)
Output Current
VSS-0.3 to 12
V
70
300
150
mA
mW
mW
Power Dissipation 1*Note1
Power Dissipation 2*Note2
Operating Temperature
Range
Topt
Tstg
-40 to 85
°C
°C
Storage Temperature
Range
-55 to 125
Lead temperature
(Soldering)
Tsolder
260°C, 10s
*Note 1: applied to SOT-89 and TO-92
*Note 2: applied to SOT-23-5 and SC-82AB
Rev.1.10
- 4 -
■ ELECTRICAL CHARACTERISTICS
●
R3111x091A/C
Symbol
-VDET
Topt=25°C
Item
Conditions
MIN.
TYP. MAX.
Unit
V
V
Detector Threshold
0.882 0.900 0.918
0.027 0.045 0.063
VHYS
Detector Threshold Hysteresis
VDD=0.80V
0.8
0.9
2.4
2.7
10
0.70
0.80
ISS
Supply Current
µA
V
2.90V
VDDH
VDDL
Maximum Operating Voltage
0.55
0.65
Topt=25°C
-40°C≤Topt≤85°C
Nch
Minimum Operating
V
Voltage*Note1
VDS=0.05V,VDD=0.70V
VDS=0.50V,VDD=0.85V
Pch
0.01
0.05
0.05
0.50
mA
Output Current
(Driver Output Pin)
IOUT
mA
µs
VDS=-2.1V,VDD=4.5V
1.0
2.0
tPLH
Output Delay Time*Note2
Detector Threshold Temperature
Coefficient
100
∆-VDET/∆T
-40°C≤Topt≤85°C
±100
ppm/°C
●
R3111x181A/C
Symbol
-VDET
Topt=25°C
Item
Conditions
MIN.
TYP. MAX.
Unit
V
V
Detector Threshold
1.764 1.800 1.836
0.054 0.090 0.126
VHYS
Detector Threshold Hysteresis
VDD=1.70V
3.80V
0.8
1.0
2.4
3.0
10
0.70
0.80
ISS
Supply Current
µA
V
VDDH
VDDL
Maximum Operating Voltage
Minimum Operating
Voltage*Note1
0.55
0.65
Topt=25°C
-40°C≤Topt≤85°C
Nch
V
VDS=0.05V,VDD=0.70V
VDS=0.50V,VDD=0.85V
Pch
0.01
1.00
0.05
2.00
mA
Output Current
(Driver Output Pin)
IOUT
mA
µs
VDS=-2.1V,VDD=4.5V
1.0
2.0
tPLH
Output Delay Time*Note2
Detector Threshold Temperature
Coefficient
100
∆-VDET/∆T
-40°C≤Topt≤85°C
±100
ppm/°C
Rev.1.10
- 5 -
●
R3111x271A/C
Symbol
-VDET
Topt=25°C
Item
Conditions
MIN.
TYP. MAX.
Unit
V
V
Detector Threshold
Detector Threshold Hysteresis
2.646 2.700 2.754
0.081 0.135 0.189
VHYS
VDD=2.60V
0.9
1.1
2.7
3.3
10
0.70
0.80
ISS
Supply Current
µA
V
4.70V
VDDH
VDDL
Maximum Operating Voltage
Minimum Operating
Voltage*Note1
0.55
0.65
Topt=25°C
-40°C≤Topt≤85°C
Nch
V
VDS=0.05V,VDD=0.70V
VDS=0.50V,VDD=1.50V
Pch
0.01
1.00
0.05
2.00
mA
Output Current
(Driver Output Pin)
IOUT
mA
µs
VDS=-2.1V,VDD=4.5V
1.0
2.0
tPLH
Output Delay Time*Note2
Detector Threshold Temperature
Coefficient
100
∆-VDET/∆T
-40°C≤Topt≤85°C
±100
ppm/°C
●
R3111x361A/C
Symbol
-VDET
Topt=25°C
Item
Conditions
MIN.
TYP. MAX.
Unit
V
V
Detector Threshold
Detector Threshold Hysteresis
3.528 3.600 3.672
0.108 0.180 0.252
VHYS
VDD=3.47V
5.60V
1.0
1.2
3.0
3.6
10
0.70
0.80
ISS
Supply Current
µA
V
VDDH
VDDL
Maximum Operating Voltage
Minimum Operating
Voltage*Note1
0.55
0.65
Topt=25°C
-40°C≤Topt≤85°C
Nch
V
VDS=0.05V,VDD=0.70V
VDS=0.50V,VDD=1.50V
Pch
0.01
1.00
0.05
2.00
mA
Output Current
(Driver Output Pin)
IOUT
mA
µs
VDS=-2.1V,VDD=4.5V
1.0
2.0
tPLH
Output Delay Time*Note2
Detector Threshold Temperature
Coefficient
100
∆-VDET/∆T
-40°C≤Topt≤85°C
±100
ppm/°C
Rev.1.10
- 6 -
●
R3111x451A/C
Symbol
-VDET
Topt=25°C
Item
Conditions
MIN.
TYP. MAX.
Unit
V
V
Detector Threshold
Detector Threshold Hysteresis
4.410 4.500 4.590
0.135 0.225 0.315
VHYS
VDD=4.34V
1.1
1.3
3.3
3.9
10
0.70
0.80
ISS
Supply Current
µA
V
6.50V
VDDH
VDDL
Maximum Operating Voltage
Minimum Operating
Voltage*Note1
0.55
0.65
Topt=25°C
-40°C≤Topt≤85°C
Nch
V
VDS=0.05V,VDD=0.70V
VDS=0.50V,VDD=1.50V
Pch
0.01
1.00
0.05
2.00
mA
Output Current
(Driver Output Pin)
IOUT
mA
µs
VDS=-2.1V,VDD=8.0V
1.5
3.0
tPLH
Output Delay Time*Note2
Detector Threshold Temperature
Coefficient
100
∆-VDET/∆T
-40°C≤Topt≤85°C
±100
ppm/°C
●
R3111x541A/C
Symbol
-VDET
Topt=25°C
Item
Conditions
MIN.
TYP. MAX.
Unit
V
V
Detector Threshold
Detector Threshold Hysteresis
5.292 5.400 5.508
0.162 0.270 0.378
VHYS
VDD=5.20V
7.40V
1.2
1.4
3.6
4.2
10
0.70
0.80
ISS
Supply Current
µA
V
VDDH
VDDL
Maximum Operating Voltage
0.55
0.65
Topt=25°C
-40°C≤Topt≤85°C
Nch
Minimum Operating
V
Voltage*Note1
VDS=0.05V,VDD=0.70V
VDS=0.50V,VDD=1.50V
Pch
0.01
1.00
0.05
2.00
mA
Output Current
(Driver Output Pin)
IOUT
mA
µs
VDS=-2.1V,VDD=8.0V
1.5
3.0
tPLH
Output Delay Time*Note2
Detector Threshold Temperature
Coefficient
100
∆-VDET/∆T
-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 Type, Output pin is pulled up with a resistance of 470kΩ 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: 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.
Rev.1.10
- 7 -
■ ELECTRICAL CHARACTERISRICS BY DETECTOR THRESHOLD
●
R3111x09x to R3111x60x
Detector Threshold
Hysteresis
Detector Threshold
Supply Current 1
Supply Current 2
Part
Number
-VDET[V]
VHYS[V]
SS1 µ
[ A]
SS2 µ
I [ A]
I
MIN.
0.882
0.980
1.078
1.176
1.274
1.372
1.470
1.568
1.666
1.764
1.862
1.960
2.058
2.156
2.254
2.352
2.450
2.548
2.646
2.744
2.842
2.940
3.038
3.136
3.234
3.332
3.430
3.528
3.626
3.724
3.822
3.920
4.018
4.116
4.214
4.312
4.410
4.508
4.606
4.704
4.802
4.900
4.998
5.096
5.194
5.292
5.390
5.488
5.586
5.684
5.782
5.880
TYP.
0.900
1.000
1.100
1.200
1.300
1.400
1.500
1.600
1.700
1.800
1.900
2.000
2.100
2.200
2.300
2.400
2.500
2.600
2.700
2.800
2.900
3.000
3.100
3.200
3.300
3.400
3.500
3.600
3.700
3.800
3.900
4.000
4.100
4.200
4.300
4.400
4.500
4.600
4.700
4.800
4.900
5.000
5.100
5.200
5.300
5.400
5.500
5.600
5.700
5.800
5.900
6.000
MAX.
0.918
1.020
1.122
1.224
1.326
1.428
1.530
1.632
1.734
1.836
1.938
2.040
2.142
2.244
2.346
2.448
2.550
2.652
2.754
2.856
2.958
3.060
3.162
3.264
3.366
3.468
3.570
3.672
3.774
3.876
3.978
4.080
4.182
4.284
4.386
4.488
4.590
4.692
4.794
4.896
4.998
5.100
5.202
5.304
5.406
5.508
5.610
5.712
5.814
5.916
6.018
6.120
MIN.
TYP.
0.045
0.050
0.055
0.060
0.065
0.070
0.075
0.080
0.085
0.090
0.095
0.100
0.105
0.110
0.115
0.120
0.125
0.130
0.135
0.140
0.145
0.150
0.155
0.160
0.165
0.170
0.175
0.180
0.185
0.190
0.195
0.200
0.205
0.210
0.215
0.220
0.225
0.230
0.235
0.240
0.245
0.250
0.255
0.260
0.265
0.270
0.275
0.280
0.285
0.290
0.295
0.300
MAX.
Condition
TYP.
MAX.
Condition
TYP.
0.9
MAX.
2.7
R3111x091x
R3111x101x
R3111x111x
R3111x121x
R3111x131x
R3111x141x
R3111x151x
R3111x161x
R3111x171x
R3111x181x
R3111x191x
R3111x201x
R3111x211x
R3111x221x
R3111x231x
R3111x241x
R3111x251x
R3111x261x
R3111x271x
R3111x281x
R3111x291x
R3111x301x
R3111x311x
R3111x321x
R3111x331x
R3111x341x
R3111x351x
R3111x361x
R3111x371x
R3111x381x
R3111x391x
R3111x401x
R3111x411x
R3111x421x
R3111x431x
R3111x441x
R3111x451x
R3111x461x
R3111x471x
R3111x481x
R3111x491x
R3111x501x
R3111x511x
R3111x521x
R3111x531x
R3111x541x
R3111x551x
R3111x561x
R3111x571x
R3111x581x
R3111x591x
R3111x601x
0.027
0.030
0.033
0.036
0.039
0.042
0.045
0.048
0.051
0.054
0.057
0.060
0.063
0.066
0.069
0.072
0.075
0.078
0.081
0.084
0.087
0.090
0.093
0.096
0.099
0.102
0.105
0.108
0.111
0.114
0.117
0.120
0.123
0.126
0.129
0.132
0.135
0.138
0.141
0.144
0.147
0.150
0.153
0.156
0.159
0.162
0.165
0.168
0.171
0.174
0.177
0.180
0.063
0.070
0.077
0.084
0.091
0.098
0.105
0.112
0.119
0.126
0.133
0.140
0.147
0.154
0.161
0.168
0.175
0.182
0.189
0.196
0.203
0.210
0.217
0.224
0.231
0.238
0.245
0.252
0.259
0.266
0.273
0.280
0.287
0.294
0.301
0.308
0.315
0.322
0.329
0.336
0.343
0.350
0.357
0.364
0.371
0.378
0.385
0.392
0.399
0.406
0.413
0.420
0.8
2.4
1.0
1.1
1.2
1.3
3.0
3.3
3.6
3.9
VDD=
(-VDET)
-0.10V
0.9
1.0
1.1
2.7
3.0
3.3
VDD=
(-VDET)
+2.0V
VDD=
(-VDET)
-0.13V
VDD=
(-VDET)
-0.16V
VDD=
(-VDET)
-0.20V
1.2
3.6
1.4
4.2
Note 1:In the case of CMOS Output parts; when the voltage is forced to VDD from 0.7V to (+VDET)+2.0V, time interval between the rising edge of VDD and
the reaching point at 50% of Output Voltage. In the case of Nch open Drain Output parts : Output pin is pulled up to 5V through 470kΩ,and when
the voltage is forced to VDD from 0.7V to (+VDET)+2.0V, time interval between the rising edge of VDD and the reaching point ar 50% of Output
Voltage.
Note 2:VDD value when Output Voltage is equal or less than 0.1V. In the case of Nch Open Drain Output parts, Output pin is pulled up to 5V through
470kΩ resistor.
Condition 1: Topt=25°C
Condition 2: -40°C≤Topt≤85°C
Rev.1.10
- 8 -
Output Delay
Time
Minim um Operating
Voltage
Detector Threshold
Tem perature Coefficient
Output Current 1
IOUT1[mA]
Output Current 2
IOUT2[mA]
MIN.
PLH µ
[ s]
VDDL[V]
∆
DET ∆
°
t
V / T[ppm/ C]
Condition
MIN.
TYP.
Condition
TYP.
MAX.
TYP.
MAX.
Condition
TYP.
VDD=
0.85V
0.05
0.5
VDD=
0.2
1.0
1.0V
Note 2
Note 2
Condi- Condi-
Nch
VDS=0.05V
VDD=0.7V
Nch
VDS=
0.5V
tion 1
0.55
tion 1
0.70
-40°C≤
Topt
≤85°C
Note 1
100
0.01
0.05
±100
Condi- Condi-
tion 2
0.65
tion 2
0.80
VDD=
1.0
2.0
1.5V
Rev.1.10
- 9 -
■ OPERATION
V
DD
Ra
Pch
Nch
OUT
GND
Comparator
Rb
Rc
Vref
Figure 1. Block Diagram
1
2
3
4
5
Step
Comparator
Pin Input Voltage
1
2
3
4
5
I
II
III
IV
V
B
Released Voltage(+VDET
Supply Voltage Detector Threshold(-VDET
)
Inde-
finite
Inde-
finite
Inde-
finite
Inde-
finite
Detector Threshold
Hysteresis
Comparator Output
Tr.1
H
L
L
H
)
(VDD
)
A
OFF
ON
ON
OFF
ON
ON
OFF
ON
OFF
ON
Minimum Operating Voltage
GND
Pch
Output Tr.
Nch
OFF
OFF
Output Voltage
(VOUT
)
Rb + Rc
Ra + Rb + Rc
Rb
I.
VDD
II.
VDD
Ra + Rb
GND
t
PLH
Figure 2. Operation Diagram
Step 1. Output Voltage is equal to 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, Output voltage equals to VDD voltage.
Step 4. 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 Detector Threshold Hysteresis.
Rev.1.10
- 10 -
■ TEST CIRCUITS
5.0V
470K
I
SS
VDD
V
DD
R3111
Series
X
VOUT
V
IN
R3111
Series
X
VIN
OUT
OUT
GND
GND
*Pull-up circuit is not necessary for
CMOS Output type, or R3111XXXXC
.
Figure 3. Supply Current Test Circuit
Figure 4. Detector Threshold Test Circuit
VDS
VDD
VDD
I
OUT
IOUT
R3111
Series
X
R3111X
Series
VIN
VIN
OUT
OUT
VDD- VDS
VDS
GND
GND
*Apply only to CMOS
Figure 5. Nch Driver Output Current Test Circuit
Figure 6. Pch Driver Output Current Test Circuit
+5.0V
+5.0V
OUT
R
100K
IN
+VDET+2.0V
0.7V
+VDET+2.0V
0.7V
V
DD
R
470K
OUT
R
470K
OUT
R3111XXX1A
Series
R3111XXX1A
Series
DD
V
SS
V
SS
OUT
P.G.
P.G.
OUT
V
OUT
CIN
GND
GND
COUT
V
SS
VSS
Figure 7. Output Delay Time Test Circuit (1)
Figure 8. Output Delay Time Test Circuit (2)
Rev.1.10
- 11 -
■ TYPICAL CHARACTERISTICS
1) Supply Current vs. Input Voltage
R3111x091C
R3111x271C
2.5
2.0
1.5
1.0
Topt=85°C
Topt=85°C
2.0
1.5
1.0
0.5
0.0
25°C
25°C
-40°C
-40°C
0.5
0.0
0
2
4
6
8
10
0
2
4
6
8
10
Input Voltage VIN(V)
Input Voltage VIN(V)
R3111x451C
2.0
Topt=85°C
25°C
1.5
1.0
0.5
0.0
-40°C
0
2
4
6
8
10
Input Voltage VIN(V)
2) Detector Threshold Hysteresis vs. Temperature
R3111x091C
R3111x271C
1.00
2.9
2.8
2.7
0.98
0.96
+VDET
-VDET
0.94
+VDET
0.92
0.90
-VDET
0.88
2.6
2.5
0.86
0.84
-60 -40 -20
0
20 40 60 80 100
-60 -40 -20
0
20 40 60 80 100
Temperature Topt(°C)
Temperature Topt(°C)
Rev.1.10
- 12 -
R3111x451C
4.8
4.7
4.6
+VDET
4.5
4.4
-VDET
-60 -40 -20
0
20 40 60 80 100
Temperature Topt(°C)
3) Output Voltage vs. Input Voltage
R3111x091C
R3111x091A
V
DD Pull-up 470kΩ
5V Pull-up 470kΩ
1.6
1.4
1.2
1.0
0.8
0.6
0.4
6
5
4
3
2
Topt=-40°C
25°C
85°C
25°C
Topt=-40°C
85°C
1
0
0.2
0.0
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6
0
0.2 0.4 0.6 0.8
1
1.2 1.4 1.6
Input Voltage VIN(V)
Input Voltage VIN(V)
R3111x271C
R3111x271A
VDD Pull-up 470kΩ
5V Pull-up 470kΩ
4.0
3.5
3.0
2.5
2.0
1.5
1.0
6
5
4
3
2
Topt=-40°C
25°C
85°C
85°C
25°C
Topt=-40°C
1.5
Input Voltage VIN(V)
1
0
0.5
0.0
0
0.5
1
2
2.5
3
3.5
4
0
0.5
1
1.5
2
2.5
3
3.5
4
Input Voltage VIN(V)
Rev.1.10
- 13 -
R3111x451C
R3111x451A
VDD Pull-up 470kΩ
5V Pull-up 470kΩ
6
5
4
3
2
6
5
4
3
2
Topt=-40°C
25°C
85°C
85°C
25°C
1
0
1
0
Topt=-40°C
0
1
2
3
4
5
6
0
1
2
3
4
5
6
Input Voltage VIN(V)
Input Voltage VIN(V)
4) Nch Driver Output Current vs. VDS
R3111x091C
R3111x091C
Topt=25°C
Topt=25°C
700
300
600
250
200
150
100
V
DD=0.85V
VDD=0.8V
500
400
300
200
0.7V
0.7V
50
0
100
0
0
0.2
0.4
DS(V)
0.6
0.8
0
0.02
0.04
0.06
0.08
0.1
V
V
DS(V)
R3111x271C
R3111x271C
Topt=25°C
Topt=25°C
20
18
16
14
300
250
200
150
100
V
DD=2.5V
2.0V
V
DD=0.8V
12
10
8
0.7V
6
1.5V
4
50
0
2
0
0
0.5
1
1.5
DS(V)
2
2.5
0
0.02
0.04
0.06
0.08
0.1
V
VDS(V)
Rev.1.10
- 14 -
R3111x451C
R3111x451C
Topt=25°C
Topt=25°C
60
50
40
30
300
250
200
150
100
V
DD=4.5V
4.0V
V
DD=0.8V
3.5V
3.0V
0.7V
20
10
0
2.5V
2.0V
50
0
1.5V
1.5
0
0.5
1
2
2.5
3
3.5
4
4.5
0
0.02
0.04
0.06
0.08
0.1
VDS(V)
VDS(V)
5) Nch Driver Output Current vs. Input Voltage
R3111x091C
R3111x271C
900
14
12
10
800
700
600
Topt=-40°C
25°C
85°C
8
6
4
2
0
500
Topt=-85°C
400
300
25°C
200
100
-40°C
0
0
0.2
0.4
0.6
0.8
1
0
0.5
1
1.5
1
2.5
3
Input Voltage VIN(V)
Input Voltage VIN(V)
R3111x451C
25
20
15
10
5
Topt=-40°C
25°C
85°C
0
0
1
2
3
4
5
6
Input Voltage VIN(V)
Rev.1.10
- 15 -
6) Pch Driver Output Current vs. Input Voltage
R3111x091C
R3111x271C
Topt=25°C
Topt=25°C
1.4
3.5
3.0
2.5
2.0
1.5
1.0
1.2
V
DS=0.7V
VDS=2.1V
1.0
0.8
0.6
0.4
1.5V
1.0V
0.5V
0.5V
0.2
0.0
0.5
0.0
0
2
4
6
8
0
1
2
3
4
5
6
7
Input Voltage VIN(V)
Input Voltage VIN(V)
R3111x451C
Topt=25°C
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
V
DS=2.1V
1.5V
1.0V
0.5V
0.5
0.0
0
2
4
6
8
10
Input Voltage VIN(V)
7) Output Delay Time vs. Load Capacitance
R3111x091A
R3111x271A
100
100
10
1
10
tPLH
tPLH
1
0.1
0.1
tPHL
0.01
tPHL
0.01
0.001
0.001
0.0001
0.001
0.01
0.1
0.0001
0.001
0.01
0.1
Load Capacitance COUT(µF)
Load Capacitance COUT(µF)
Rev.1.10
- 16 -
R3111x451A
100
10
1
t
t
PLH
PHL
0.1
0.01
0.001
0.0001
0.001
0.01
0.1
Load Capacitance COUT(µF)
8) Output Delay Time vs. Input Pin Capacitance
R3111x091A
R3111x271A
100
100
10
1
10
t
t
PLH
PHL
1
t
t
PLH
PHL
0.1
0.1
0.01
0.01
0.001
0.001
0.0001
0.001
0.01
0.1
0.0001
0.001
0.01
0.1
Input Pin Capacitance CIN(µF)
Input Load Capacitance CIN(µF)
R3111x451A
100
10
1
t
t
PLH
PHL
0.1
0.01
0.001
0.001
0.01
0.1
1
Input Pin Capacitance CIN(µF)
Rev.1.10
- 17 -
■ TYPICAL APPLICATION
●
R3111xxx1A CPU Reset Circuit (Nch Open Drain Output)
Case 1.Input Voltage to R3111xxx1A is equal to
Input Voltage to CPU
Case 2.Input Voltage to R3111xxx1A is unequal to
Input Voltage to CPU
VDD1
VDD
VDD2
VDD
VDD
VDD
470K
R
470K
VDD
R
CPU
RESET
GND
CPU
RESET
GND
R3111XXX1A
SERIES
R3111XXX1A
SERIES
OUT
OUT
GND
GND
●
R3111xxx1A CPU Reset Circuit CMOS Output
VDD
V
DD
VDD
CPU
RESET
GND
R3111XXX1C
SERIES
OUT
GND
●
●
R3111xxx1A Output Delay Time Circuit 1
(Nch Open Drain Output)
R3111xxx1A Output Delay Time Circuit 2
(Nch Open Drain Output)
V
DD
VDD
V
DD
VDD
CPU
RESET
GND
470K
R3111XXX1A
R1
R2
470K
V
DD
R
100K
CPU
R3111XXX1A
SERIES
RESET
GND
SERIES
OUT
VDD
OUT
GND
GND
●
Memory Back-up Circuit
V
DD
V
CC
D1
V
CC
V
CC
V
CC
V
CC
D2
Y1
Y2
Y3
Y4
A
B
G
RAM1
RAM2
RAM3
RAM4
GND CS GND CS GND CS GND CS
GND
V
DD
OUT
R3111XXX1C
SERIES
GND
Rev.1.10
- 18 -
●
Voltage level Indicator Circuit (lighted when the power runs out)
(Nch Open Drain Output)
VDD
VDD
R3111XXX1A
SERIES
OUT
GND
●
Detector Threshold Adjustable Circuit
(Nch Open Drain Type Output)
Adjusted Detector Threshold
=(-VDET)*(Ra+Rb)/Rb
V
DD
Ra
Hysteresis Voltage
V
DD
OUT
R3111XXX1A
SERIES
HYS
=(V )*(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.
+
Rb
GND
C
●
Window Comparator Circuit
(Nch Open Drain Output)
V
DD
VDET1
VDET2
V
DD
SS
V
DD
OUT
R3111XXX1A
SERIES
OUT
V
DD
VDET2
V
OUT
GND
R3111XXX1A
SERIES
OUT
VDET1
GND
V
SS
●
Over-charge Preventing Circuit
D1
R1
Light
R2
V
DD
R4
R3111XXX1C
SERIES
OUT
R3
GND
Rev.1.10
- 19 -
TECHNICAL NOTES
V
DD
DD
V
DD
DD
R1
R
V
V
R2
OUT
R3111
SERIES
OUT
R3111
SERIES
GND
GND
Figure 9
Figure 10
1. In Figure 9, When R3111xxx1C is used, and if an impedance is connected in between Voltage Supplier and the VDD
Pin of R3111xxx1C Series, the operation might be unstable by through-type current at detection.
When R3111xxx1A is used in Figure 9, if the value of R is set excessively large, voltage drop may occur caused by
supply crrent 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.
Rev.1.10
- 20 -
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