’98.Dec.05
LOW VOLTAGE DETECTOR
R3111xxx1A/C Series
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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.
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FEATURES
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Ultra-low Supply Current............................................................... TYP. 0.8µA (V
DD
=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
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APPLICATIONS
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CPU and Logic Circuit Reset
Battery Checker
Window Comparator
Wave Shaping Circuit
Battery Back-up Circuit
Power Failure Detector
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BLOCK DIAGRAMS
R3111XXX1A
V
DD
OUT
R3111XXX1C
V
DD
OUT
Vref
GND
Vref
GND
Rev.1.10
-1-
s
TIMING CHART
Release Voltage +V
DET
Supply Voltage Detector Threshold -V
DET
(V
DD
)
Minimum Operating Voltage
V
SS
Detector Threshold
Hysteresis
Output Voltage
(OUT)
V
SS
t
PLH
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DEFINITION OF OUTPUT DELAY TIME
Output Delay Time t
PLH
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 V
DD
pulse from 0.7V to (+V
DET
)+ 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 V
DD
pulse from 0.7V to (+V
DET
)+ 2.0V and becoming of the output voltage to
(V
DD
/
2) V.
+V
DET
+ 2.0V
Input Voltage
(V
DD
)
0.7V
GND
5.0V
Output Voltage
2.5V
+V
DET
+ 2.0V
Input Voltage
(V
DD
)
0.7V
GND
+V
DET
+2.0V
Output Voltage
+V
DET
+2.0V
2
GND
t
PHL
t
PLH
GND
t
PHL
t
PLH
Nch Open Drain Output
CMOS Output
Rev.1.10
-2-
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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
a
b
c
Contents
Designation of Package Type;
E: TO-92
Q: SC-82AB
H: SOT-89
N: SOT-23-5
Setting Detector Threshold (-V
DET
);
Stepwise setting with a step of 0.1V in the range of 0.9V to 6.0V is possible.
Designation of Output Type;
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
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Rev.1.10
-3-
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PIN CONFIGURATION
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TO-92
q
SOT-89
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SOT-23-5
5
4
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SC-82AB
4
3
(mark side)
(mark side)
(mark side)
(mark side)
1
2
1
2
3
1
2
3
1
2
3
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PIN DESCRIPTION
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TO-92
Pin No.
Symbol
1
V
DD
2
GND
3
OUT
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SOT-89
Pin No.
Symbol
1
OUT
2
V
DD
3
GND
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SOT-23-5
Pin No.
Symbol
1
OUT
2
V
DD
3
GND
4
NC
5
NC
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SC-2AB
Pin No.
Symbol
1
OUT
2
V
DD
3
NC
4
GND
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ABSOLUTE MAXIMUM RATINGS
Item
Supply Voltage
Output Voltage (CMOS)
Output Voltage (Nch)
Output Current
Power Dissipation 1*
Note1
Power Dissipation 2*
Note2
Operating Temperature
Topt
Range
Storage Temperature
Tstg
Range
Lead temperature
Tsolder
(Soldering)
*Note 1: applied to SOT-89 and TO-92
*Note 2: applied to SOT-23-5 and SC-82AB
Symbol
V
DD
V
OUT1
V
OUT2
I
OUT
P
D
P
D
Rating
12
V
SS
-0.3 to V
DD
+0.3
V
SS
-0.3 to 12
70
300
150
-40 to 85
-55 to 125
260°C, 10s
Unit
V
V
V
mA
mW
mW
°C
°C
Rev.1.10
-4-
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ELECTRICAL CHARACTERISTICS
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R3111x091A/C
Symbol
Item
-V
DET
Detector Threshold
V
HYS
Detector Threshold Hysteresis
I
SS
V
DDH
V
DDL
Supply Current
Maximum Operating Voltage
Minimum Operating
Voltage*
Note1
Output Current
(Driver Output Pin)
Output Delay Time*
Note2
Detector Threshold Temperature
Coefficient
Conditions
MIN.
0.882
0.027
TYP.
0.900
0.045
0.8
0.9
0.55
0.65
0.01
0.05
1.0
0.05
0.50
2.0
100
-40°C≤Topt≤85°C
±100
Topt=25°C
MAX.
Unit
0.918
V
0.063
V
2.4
µA
2.7
10
V
0.70
V
0.80
mA
mA
µs
ppm/°C
Topt=25°C
MAX.
Unit
1.836
V
0.126
V
2.4
µA
3.0
10
V
0.70
V
0.80
mA
mA
100
-40°C≤Topt≤85°C
±100
µs
ppm/°C
V
DD
=0.80V
2.90V
Topt=25°C
-40°C≤Topt≤85°C
Nch
V
DS
=0.05V,V
DD
=0.70V
V
DS
=0.50V,V
DD
=0.85V
Pch
V
DS
=-2.1V,V
DD
=4.5V
I
OUT
t
PLH
∆-V
DET
/∆T
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R3111x181A/C
Symbol
Item
-V
DET
Detector Threshold
V
HYS
Detector Threshold Hysteresis
I
SS
V
DDH
V
DDL
Supply Current
Maximum Operating Voltage
Minimum Operating
Voltage*
Note1
Output Current
(Driver Output Pin)
Output Delay Time*
Note2
Detector Threshold Temperature
Coefficient
Conditions
MIN.
1.764
0.054
V
DD
=1.70V
3.80V
Topt=25°C
-40°C≤Topt≤85°C
Nch
V
DS
=0.05V,V
DD
=0.70V
V
DS
=0.50V,V
DD
=0.85V
Pch
V
DS
=-2.1V,V
DD
=4.5V
TYP.
1.800
0.090
0.8
1.0
0.55
0.65
I
OUT
0.01
1.00
1.0
0.05
2.00
2.0
t
PLH
∆-V
DET
/∆T
Rev.1.10
-5-
