R3112x SERIES
LOW VOLTAGE DETECTOR WITH OUTPUT DELAY
NO. EA-087-090422
1
OUTLINE
The R3112x Series are CMOS-based volt age detect or ICs with high detector threshold a ccuracy 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 consi sts of a voltage referen ce unit, a comp arator, resistor net for d etector threshold settin g,
an output driver, a hysteresis circuit, and an output delay 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.
Three types of packages, SOT-23-5, small SC-82AB, SC-88A and ultra-small SON1612-6 can be selected so
that high density mounting on boards is possible.
FEATURES
• Built-in Output Delay Circuit...............................................Typ. 100ms with an external capacitor: 0.022μF
• Supply Current...................................................................Typ. 0.5 μA (R3112x271A/C, VDD=2.6V)
• Operating Voltage..............................................................0.7 to 6.0V(Topt=25°C)
• Detector Threshold.............................................................0.9V to 5.0V
• High Accuracy Detector Threshold ....................................±2.0%
• Low Tempera t ure-Drift Coefficient of Detector Threshold...Typ. ±100ppm/°C
• Two Output Types..............................................................Nch Open Drain and CMOS
• Packages ...........................................................................SOT-23-5(Mini-mold),SC-82AB, SC-88A,
SON1612-6
APPLICATIONS
• CPU and Logic Circuit Reset
• Battery Checker
• Window Comparator
• Wave Shaping Circuit
• Battery Back-up Circuit
• Power Failure Detector
R3112x
2
BLOCK DIAGRAMS
R3112xxx1A R3112xxx1C
GND
V
DD
-
+
Vref
OUT
R
D
C
D
GND
V
DD
-
+
Vref
OUT
R
D
C
D
SELECTION GUIDE
The package type, the detector threshold, the output type, and the taping type of R3112x Series can be
designated at the users’ request by specifying the part number as follows;
R3112xxxxx-xx -x ← Part Number
↑ ↑ ↑↑ ↑ ↑
a b c d e f
Code Contents
a
Designation of Packa ge Type;
R3112Dxx1x: SON1612-6
R3112Nxx1x: SOT-23-5
R3112Qxx1x: SC-82AB
R3112Qxx2x: SC-88A
b Setting Detector Threshold (−VDET);
Stepwise setting with a step of 0.1V in the range of 0.9V to 5.0V is possible.
c Designation of Packa ge Type
1: except SC-88A
2: SC-88A
d Designation of Output Type;
A: Nch Open Drain
C: CMOS
e Designation of Packing or Taping Type;
Ex. SOT-23-5, SC-82AB, SC-88A, SON1612-6: TR is prescribed as standard
directions. (Refer to Taping Specifications)
Designation of Composition of pin plating;
-F: Lead free plating (SOT-23-5, SC-82AB, SC-88A, SON1612-6)
R3112x
3
PIN CONFIGURATION
SOT-23-5 SC-82AB SC-88A SON1612-6
1 2 3
4
5
(m ark side)
4 3
12
(mark side)
54
13
2
(mark side)
1 2 3
6 5 4
PIN DESCRIPTION
• SOT-23-5 •SC-82AB
Pin No. Symbol Description Pin No. Symbol Description
1 OUT
Output Pin (Output “L” at
detector threshold, Output “H”
at released voltage) 1 VDD Voltage Supply Pin
2 VDD Voltage Supply Pin 2 GND Ground Pin
3 GND Ground Pin 3 CD Pin for External Capacitor
(for setting output delay)
4 NC No Connection 4 OUT
Output Pin (Output “L” at
detector threshold, Output “H”
at released voltage)
5 CD Pin for External Capacitor
(for setting output delay)
• SC-88A •SON1612-6
Pin No. Symbol Description Pin No. Symbol Description
1 VDD Voltage Supply Pin 1 OUT Output Pin (Output “L” at
detector threshold, Output “H”
at released voltage)
2 NC No Connection 2 GND Ground Pin
3 GND Ground Pin 3 CD Pin for External Capacitor
(for setting output delay)
4 CD Pin for External Capacitor
(for setting output delay) 4 NC No Connection
5 OUT
Output Pin (Output “L” at
detector threshold, Output “H”
at released voltage) 5 GND Ground Pin
6 VDD Voltage Supply Pin
R3112x
4
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VDD Supply Voltage 6.5 V
VOUT1 Output Voltage (CMOS) VSS−0.3 to VDD+0.3 V
VOUT2 Output Voltage (Nch) VSS−0.3 to 6.5 V
IOUT Output Current 20 mA
Power Dissipation (SOT-23-5)* 420
Power Dissip ation (SC-82AB)* 380
Power Dissip ation (SC-88A)* 380
PD
Power Dissipation (SON1612-6)* 500
mW
Topt Operating Temperature Range −40 to 85 °C
Tstg Storage Temperature Range −55 to 125 °C
Tsolder Lead temperature (Solderi ng) 260°C, 10s
* ) For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system u sing the device
in the field. The functional operation at or over these absolute maximum ratings is not assured.
R3112x
5
ELECTRICAL CHARACTERISTICS
• R3112x091A/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
VDD=0.80V 0.6 2.0
ISS Supply Current VDD=1.90V 0.5 2.0
μA
VDDH Maximum Operating Voltage 6.0 V
Topt=25°C 0.70
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.80
V
10 120 μA
Nch
VDS=0.05V, VDD=0.70V
VDS=0.50V, VDD=0.85V 0.05 0.90 mA
IOUT Output Current (Driver Output Pin) Pch
VDS=−2.1V, VDD=4.5V 1.0 3.5 mA
VTCD CD pi n Threshold Voltage VDD=0.99V 0.297 0.495 0.693 V
VDS=0.10V, VDD=0.70V 2 70
ICD CD pin Output Current VDS=0.50V, VDD=0.85V 10 400 μA
RD Output Delay Resistance 3.25 6.50 13.00 MΩ
Δ−VDET/
ΔTopt Detector Threshold
Temperature Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/
°C
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment sho uld b e designed that the mounted semiconductor device s o perate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or su rge. And the semicondu ctor devices may receive seriou s damage when they continu e
to operate over the recommended operating conditions.
R3112x
6
• R3112x271A/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 0.189 V
VDD=2.60V 1.0 3.0
ISS Supply Current VDD=3.70V 0.5 2.5
μA
VDDH Maximum Operating Voltage 6.0 V
Topt=25°C 0.7
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.8
V
Nch
VDS=0.05V,VDD=0.70V 10 120 μA
VDS=0.50V,VDD=1.50V 1.0 3.0 mA
IOUT Output Current (Driver Output Pin) Pch
VDS=−2.1V,VDD=4.5V 1.0 3.5 mA
VTCD CD pi n Threshold Voltage VDD=2.97V 0.891 1.485 2.079 V
VDS=0.1V,VDD=0.7V 2 70 μA
ICD CD pin Output Current VDS=0.5V,VDD=1.5V 200 500
RD Output Delay Resistance 3.25 6.50 13.00 MΩ
Δ−VDET/
ΔTopt Detector Threshold
Temperature Coefficient −40°C
<
=
Topt
<
=
85°C ±100 ppm/
°C
R3112x
7
• R3112x501A/C Topt=25°C
Symbol Item Conditions Min. Typ. Max. Unit
−VDET Detector Threshold 4.900 5.000 5.100 V
VHYS Detector Threshold Hysteresis 0.150 0.250 0.350 V
VDD=4.9V 1.5 3.0
ISS Supply Current VDD=6.0V 0.6 2.5
μA
VDDH Maximum Operating Voltage 6.0 V
Topt=25°C 0.7
VDDL Minimum Operating Voltage∗Note1 −40°C
<
=
Topt
<
=
85°C 0.8
V
Nch
VDS=0.05V,VDD=0.70V 10 120 μA
VDS=0.50V,VDD=1.50V 1.0 3.0 mA
IOUT Output Current
(Driver Output Pin) Pch
VDS=−2.1V,VDD=6.0V 1.5 4.5
mA
VTCD CD pin Threshold Voltage VDD=5.50V 1.650 2.750 3.850 V
VDS=0.1V, VDD=0.7V 2 70
ICD CD pin Output Current VDS=0.5V, VDD=1.5V 200 500 μA
RD Output Delay Resistance 3.25 6.50 13.00 MΩ
Δ−VDET/
ΔTopt 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 Type, Output pin is pulled up with a resistance of 470kΩ to 5.0V.)
R3112x
8
ELECTRICAL CHARACTERISTICS BY DETECTOR THRESHOLD
Detector
Threshold Hysteresis
Range Suppl y Current 1 Supply Current 2 Ou tput Current 1 Output Current 2
Product Code
−VDET[V] VHYS[V] ISS1[μA] ISS2[μA] IOUT1[mA] IOUT2[mA]
Min. Typ. Max. Min. Typ. Max.
Condi-
tions
Typ. Max.
Condi-
tions
Typ. Max.
Condi-
tions
Min. Typ. Conditions Min. Typ.
R3112x091A/C 0.882 0.900 0.918 0.027 0.045 0.063
R3112x101A/C 0.980 1.000 1.020 0.030 0.050 0.070 0.6 2.0 0.05 0.9
R3112x111A/C 1.078 1.100 1.122 0.033 0.055 0.077
R3112x121A/C 1.176 1.200 1.224 0.036 0.060 0.084
R3112x131A/C 1.274 1.300 1.326 0.039 0.065 0.091
R3112x141A/C 1.372 1.400 1.428 0.042 0.070 0.098
R3112x151A/C 1.470 1.500 1.530 0.045 0.075 0.105
0.7 2.5
0.5 2.0
V
DS=
0.5V
V
DD=
0.85V 0.2 1.8
R3112x161A/C 1.568 1.600 1.632 0.048 0.080 0.112
R3112x171A/C 1.666 1.700 1.734 0.051 0.085 0.119
R3112x181A/C 1.764 1.800 1.836 0.054 0.090 0.126
R3112x191A/C 1.862 1.900 1.938 0.057 0.095 0.133
R3112x201A/C 1.960 2.000 2.040 0.060 0.100 0.140
R3112x211A/C 2.058 2.100 2.142 0.063 0.105 0.147
R3112x221A/C 2.156 2.200 2.244 0.066 0.110 0.154
R3112x231A/C 2.254 2.300 2.346 0.069 0.115 0.161
R3112x241A/C 2.352 2.400 2.448 0.072 0.120 0.168
R3112x251A/C 2.450 2.500 2.550 0.075 0.125 0.175
R3112x261A/C 2.548 2.600 2.652 0.078 0.130 0.182
R3112x271A/C 2.646 2.700 2.754 0.081 0.135 0.189
R3112x281A/C 2.744 2.800 2.856 0.084 0.140 0.196
R3112x291A/C 2.842 2.900 2.958 0.087 0.145 0.203
R3112x301A/C 2.940 3.000 3.060 0.090 0.150 0.210
1.0 3.0 0.5 2.5
R3112x311A/C 3.038 3.100 3.162 0.093 0.155 0.217
R3112x321A/C 3.136 3.200 3.264 0.096 0.160 0.224
R3112x331A/C 3.234 3.300 3.366 0.099 0.165 0.231
R3112x341A/C 3.332 3.400 3.468 0.102 0.170 0.238
R3112x351A/C 3.430 3.500 3.570 0.105 0.175 0.245
R3112x361A/C 3.528 3.600 3.672 0.108 0.180 0.252
R3112x371A/C 3.626 3.700 3.774 0.111 0.185 0.259
R3112x381A/C 3.724 3.800 3.876 0.114 0.190 0.266
R3112x391A/C 3.822 3.900 3.978 0.117 0.195 0.273
R3112x401A/C 3.920 4.000 4.080 0.120 0.200 0.280
1.2 3.0 0.6 2.5
R3112x411A/C 4.018 4.100 4.182 0.123 0.205 0.287
R3112x421A/C 4.116 4.200 4.284 0.126 0.210 0.294
R3112x431A/C 4.214 4.300 4.386 0.129 0.215 0.301
R3112x441A/C 4.312 4.400 4.488 0.132 0.220 0.308
R3112x451A/C 4.410 4.500 4.590 0.135 0.225 0.315
R3112x461A/C 4.508 4.600 4.692 0.138 0.230 0.322
R3112x471A/C 4.606 4.700 4.794 0.141 0.235 0.329
R3112x481A/C 4.704 4.800 4.896 0.144 0.240 0.336
R3112x491A/C 4.802 4.900 4.998 0.147 0.245 0.343
R3112x501A/C 4.900 5.000 5.100 0.150 0.250 0.350
V
DD
=
−
V
DET
−
0.1V
1.5 3.0
V
DD
=
−
V
DET
+
0.1V
0.6 2.5
V
DS=
0.05V
V
DD=
0.7V
0.01 0.12 Nch
V
DS=
0.5V
V
DD=
1.5V
1.0 3.0
R3112x
9
Output Current 3 Minimum Operating
Voltage CD pin Threshold
Voltage CD pin Output
Current 1 CD pin Output
Current 2 Resistance for
Output Delay
Detector
Threshold
Temperature
IOUT3[mA] VDDL[V] VTCD[V] ICD1[μA] ICD2[μA] RD[MΩ] Δ−VDET/
ΔTopt
[ppm/°C]
Condition Min. Typ.
Condi-
tion
Max.
Condi-
tion
Max.
Condi-
tion
Min. Typ. Max.
Condi-
tion
Min. Typ.
Condi-
tion
Min. Typ. Min. Typ. Max.
Condi-
tion
Typ.
0.297 0.495 0.693
0.330 0.550 0.770
V
DS
=
0.5V
V
DD
=
0.85V
10 400
0.363 0.605 0.847
0.396 0.660 0.924
0.429 0.715 1.001
0.462 0.770 1.078
0.495 0.825 1.155
V
DS
=
0.5V
V
DD
=
0.85V
50 450
0.528 0.880 1.232
0.561 0.935 1.309
0.594 0.990 1.386
0.627 1.045 1.463
0.660 1.100 1.540
0.693 1.155 1.617
0.726 1.210 1.694
0.759 1.265 1.771
0.792 1.320 1.848
0.825 1.375 1.925
0.858 1.430 2.002
0.891 1.485 2.079
0.924 1.540 2.156
0.957 1.595 2.233
0.990 1.650 2.310
1.023 1.705 2.387
1.056 1.760 2.464
1.089 1.815 2.541
1.122 1.870 2.618
1.155 1.925 2.695
1.188 1.980 2.772
1.221 2.035 2.849
1.254 2.090 2.926
V
DS
=
−
21V
V
DD
=
4.5V
1.5 3.5
1.287 2.145 3.003
1.320 2.200 3.080
1.353 2.255 3.157
1.386 2.310 3.234
1.419 2.365 3.311
1.452 2.420 3.388
1.485 2.475 3.465
1.518 2.530 3.542
1.551 2.585 3.619
1.584 2.640 3.696
1.617 2.695 3.773
Pch
V
DS
=
−
2.1V
V
DD
=
6.0V
2.0 4.5
Topt
=
25
°
C 0.7
−
40
°
C
<
=
Topt
<
=
85
°
C
0.8 V
DD
=
(V
DET
)
×
1.1V
1.650 2.750 3.850
V
DS
=
0.1V
V
DD
=
0.7V
20 70
V
DS
=
0.5V
V
DD
=
1.5V
200 500
3.25 6.5 13.0
−
40
°
C
<
=
Topt
<
=
85
°
C
±
100
R3112x
10
OPERATION
VDD
Pch
Rc
Tr.1 Tr.2
Rb
Ra
Nch
RD
OUT
CD
GND
+
-
Vref
Schmitt Trigger
Comparator
Current Source
Output Capacitor
Fig. 1 Block Diagram with an external capacitor
HYSTERESIS
RANGE
1
GND
GND
Delay Time
A
B
Output Voltage(OUT)
Supply Voltage(VDD)
VDDL
-VDET
+VDET
Minimum Operating
Voltge
Detector Threshold
Released Voltage
23 45
Operation Status
Compartor(-) Pin
Input Voltage
Compartor Output
Tr.1, 2
1
I
I VDD
L
OFF
Rb+Rc
Ra+Rb+Rc
OFF
ON
Output Tr. Nch
Pch
2
II
H
ON
ON
OFF
4
II
H
ON
ON
OFF
5
I
L
OFF
OFF
ON
3
II
Indefinite
Indefinite
Indefinite
Indefinite
II VDD
Rb
Ra+Rb
Fig. 2 Operation Diagram
1. Output voltage is equal to sup ply voltage. (As for Nch open drain type, equal to pull-up volta ge.)
2. When the supply voltage i s do wn to the detector threshold voltage level(Point A),
Vref
>
=
VDD×(Rb+Rc)/(Ra+Rb+Rc) is true, then output of the comparato r is reversed f rom “L” to “H”, therefore
output voltage becomes G ND level.
3. When the supply voltage is lower than minimum operating voltage, the operation of output transistor is
indefinite. In the case of Nch open drain type, output voltage is equal to pull-up volt age.
4. Output Voltage becomes G ND level.
5. When the supply voltage is higher than released voltage (Point B), Vref
<
=
VDD×Rb/(Ra+Rb) is true, then
output of the comparator reaches the threshold level, and Output of Shmitt Trigger is reversed from “H” to
“L”, then output voltage is equal to supply voltage. (As for Nch open drain type, equal to pull-up voltage.)
∗) The difference between released voltage and detector threshold voltage means hysteresis range voltage.
R3112x
11
• Operation of Output Dela y
GND
GND
Released Voltage (+VDET)
CD Pin Threshold Voltage (VTCD)
Output Delay Time(tD)
Output Voltage
Capacitor Voltage
Supply Voltage
When the supply voltage which is higher than released voltage is forced to VDD pin, charge to an external
capacitor st ar t s, then cap acitor voltage increa ses. Until the ca p acitor volt age rea ches to CD Pin thre shold v olt age,
output voltage maintains “L”. When the capacitor voltage becomes higher than CD pin threshold voltage, output
voltage is rev ersed from "L” to "H". Where, the time interval betwee n the rising edge of supply volt age and output
voltage reverse poi nt means output delay time.
• Output Dela y Time
Output Delay Time (tD) can be calculated with the next formula.
tD=0.69×RD×CD(s)
RD is internal resistor and set at 6.5MΩ(Typ.) typically. CD(F) describes the capacitance value of an external
capacitor. Therefore,
tD=0.69×6.5×106×CD(s)
R3112x
12
TEST CIRCUITS
∗Pull-up circuit is not necessary for CMOS Output type, or R3112xxxxC.
R3112x
V
DD
V
IN
I
SS
GND
R3112x
V
DD
OUT
+5V or V
DD
470kΩ
V
IN
GND
Supply Current Test Circuit Detector Threshold Test Circuit
VDD
OUT
VIN
VDS
GND
IOUT
R3112x
V
DD
OUT
V
IN
V
DD
+V
DS
GND
I
OUT
R3112x
Nch Driver Output Curr ent Test Circuit Pch Driver Output Current Test Circuit
∗Apply only to CMOS
V
DD
C
D
OUT
+5V or V
DD
470kΩ
V
IN
GND
V
DS
R3112x
V
DD
C
D
V
IN
GND
V
DS
I
CD
R3112x
CD Pin Threshold Test Circuit CD Pin Output Current Test Circuit
+V
DET
+2.0 or 0.6V
Input
Voltage
Output Voltage
0.7V
GND
100%
50%
GND
R3112x
V
DD
C
D
O
UT
+5V
470kΩ
V
IN
GND
C
D
Output Delay Time Test Circuit
R3112x
13
TYPICAL CHARACTERISTICS
1) Supply Current vs. Input Voltage
R3112x091x R3112x131x
1.5
1.2
0.9
0.6
0.3
0
Input Voltage V
IN
(V)
Supply Current I
ss
(μA)
01234567
Topt=85°C
-40°C
25°C
1.5
1.2
0.9
0.6
0.3
0
Input Voltage V
IN
(V)
Supply Current I
ss
(μA)
01234567
Topt=85°C
-40°C
25°C
R3112x271x R3112x451x
1.5
1.2
0.9
0.6
0.3
0
Input Voltage V
IN
(V)
Supply Current I
ss
(μA)
01234567
Topt=85°C
-40°C
25°C
2.0
1.6
1.2
0.8
0.4
0
Input Voltage V
IN
(V)
Supply Current I
ss
(μA)
01234567
Topt=85°C
-40°C
25°C
2) Detector Threshold vs. Temperature
R3112x091x R3112x131x
0.98
0.88
0.86
Temperature Topt(°C)
Detector Threshold/Released Voltage
VDET(V)
-50 -25 75 1000 25 50
0.90
0.92
0.94
0.96 +V
DET
-V
DET
1.42
1.28
1.26
Temperature Topt(°C)
Detector Threshold/Released Voltage
V
DET
(V)
-50 -25 75 1000 25 50
1.30
1.32
1.34
1.36
1.38
1.40
+V
DET
-V
DET
R3112x
14
R3112x271x R3112x451x
2.90
2.65
2.60
Temperature Topt(°C)
Detector Threshold/Released Voltage
VDET(V)
-50 -25 75 1000 25 50
2.70
2.75
2.80
2.85 +V
DET
-V
DET
4.75
4.40
4.35
Temperature Topt(°C)
Detector Threshold/Released Voltage
V
DET
(V)
-50 -25 75 1000 25 50
4.45
4.50
4.55
4.60
4.65
4.70 +V
DET
-V
DET
3) Output Voltage vs. Input Voltage
R3112x091x R3112x091A
1.0
0.8
0.6
0.4
0.2
0.0
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
0 0.2 0.8 10.4 0.6
Nch Output Type: VDD pull up
Topt=-40°C
25°C
85°C
6.0
5.0
4.0
3.0
2.0
0.0
Input Voltage VIN(V)
Output Voltage VOUT(V)
0 0.2 0.8 10.4 0.6
1.0
5V pull up via 470kΩ
Topt=-40°C
25°C
85°C
R3112x131x R3112x131A
1.5
1.2
0.9
0.6
0.3
0
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
0 0.3 1.2 1.50.6 0.9
Nch Output Type: V
DD
pull up
Topt=-40°C
25°C
85°C
6.0
5.0
4.0
3.0
2.0
0.0
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
0 0.3 1.2 1.50.6 0.9
1.0
5V pull up via 470kΩ
Topt=-40°C
25°C
85°C
R3112x
15
R3112x271x R3112x271A
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Nch Output Type: V
DD
pull up
Topt=-40°C
25°C
85°C
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
0.0 0.5 1.0 1.5 2.0 2.5 3.0
5V pull up via 470kΩ
Topt=-40°C
25°C
85°C
R3112x451x R3112x451A
5.0
4.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0.0
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Nch Output Type: V
DD
pull up
Topt=-40°C
25°C85°C
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
0.0 0.5 1.0 2.0 3.5 4.0 5.02.5 3.01.5 4.5
5V pull up via 470kΩ
Topt=-40°C
25°C
85°C
4) Nch Driver Output Current vs. VDS
R3112x091x R3112x131x
1.2
1.0
0.6
0.4
0.2
0
VDS(V)
Output Current IOUT(mA)
0 0.2 0.4 0.6 0.8 1
0.8
Topt=25°C
VDD=0.85V
0.7V
2.5
2.0
1.5
1.0
0.5
0
VDS(V)
Output Current IOUT(mA)
0 0.2 0.4 0.6 0.8 1
Topt=25°C
VDD=1.0V
0.85V
0.7V
R3112x
16
R3112x271x R3112x451x
20
16
12
8
4
0
V
DS
(V)
Output Current I
OUT
(mA)
0 0.5 1 1.5 2 2.5
Topt=25°C
V
DD=2.5V
1.0V
1.5V
2.0V
20
16
12
8
4
0
VDS(V)
Output Current IOUT(mA)
0 0.5 1.5 3 3.5 421 2.5
Topt=25°C
VDD=2.5V
VDD=3.0V
VDD=4.0V
VDD=3.5V
1.0V
1.5V
2.0V
5) Nch Driver Output Current vs. Input Voltage
R3112x091x R3112x131x
2.0
1.5
1.0
0.5
0.0
Input Voltage V
IN
(V)
Output Current I
OUT
(mA)
0 0.2 0.4 0.6 0.8 1
Topt=25°C
-40°C
85°C
5
4
2
1
0
Input Voltage VIN(V)
Output Current IOUT(mA)
0 0.3 0.6 0.9 1.2 1.5
3
Topt=-40°C
85°C
25°C
R3112x271x R3112x451x
5
4
0
Input Voltage V
IN
(V)
Output Current I
OUT
(mA)
0 0.5 31 1.5 2 2.5
3
2
1
Topt=-40°C
85°C
25°C
5
4
0
Input Voltage V
IN
(V)
Output Current I
OUT
(mA)
012345
3
2
1
Topt=-40°C
85°C
25°C
R3112x
17
6) Pch Driver Output Current vs. Input Voltage
R3112x091C R3112x131C
6
1
0
Input Voltage VIN(V)
Output Current IOUT(mA)
01 4 67532
2
3
4
5
Topt=25°C
VDS=-2.1V
-0.5V
-1.0V
-1.5V
6
1
0
Input Voltage VIN(V)
Output Current IOUT(mA)
01 4 67532
2
3
4
5
Topt=25°C
VDS=-2.1V
-0.5V
-1.0V
-1.5V
R3112x271C R3112x451C
6
1
0
Input Voltage VIN(V)
Output Current IOUT(mA)
01 4 67532
2
3
4
5
Topt=25°C
VDS=-2.1V
-0.5V
-1.0V
-1.5V
6
1
0
Input Voltage VIN(V)
Output Current IOUT(mA)
01 4 67532
2
3
4
5
Topt=25°C
VDS=-2.1V
-0.5V
-1.0V
-1.5V
7) CD Pin Threshold Voltage vs. Temperature
R3112x091x R3112x131x
0.8
0.3
0.2
Temperature Topt(°C)
C
D
Pin Threshold Voltage V
TCD
(V)
-50 -25 75 1000 25 50
0.4
0.5
0.6
0.7
V
DD
=0.99V
1.0
0.5
0.4
Temperature Topt(°C)
C
D
Pin Threshold Voltage V
TCD
(V)
-50 -25 75 1000 25 50
0.6
0.7
0.8
0.9
V
DD
=1.43V
R3112x
18
R3112x271x R3112x451x
1.9
1.4
1.3
Temperature Topt(°C)
C
D
Pin Threshold Voltage V
TCD
(V)
-50 -25 75 1000 25 50
1.5
1.6
1.7
1.8
V
DD
=2.97V
2.9
2.4
2.3
Temperature Topt(°C)
C
D
Pin Threshold Voltage V
TCD
(V)
-50 -25 75 1000 25 50
2.5
2.6
2.7
2.8
V
DD
=4.95V
8) CD Pin Output Current vs. Input Voltage
R3112x091x R3112x131x
1.0
0.8
0.4
0.2
0
Input Voltage V
IN
(V)
C
D
Pin Output Current I
CD
(mA)
0 0.2 0.4 0.6 0.8 1
0.6
V
DS
=0.5V
Topt=-40°C
85°C
25°C
1.0
0.8
0.4
0.2
0
Input Voltage V
IN
(V)
C
D
Pin Output Current I
CD
(mA)
0 0.3 0.6 0.9 1.2 1.5
0.6
V
DS
=0.5V
Topt=-40°C
85°C
25°C
R3112x271x R3112x451x
1.0
0.8
0.4
0.2
0
Input Voltage VIN(V)
CD Pin Output Current ICD(mA)
0 0.5 1 2.5231.5
0.6
VDS=0.5V
Topt=-40°C
85°C
25°C
1.0
0.8
0.4
0.2
0
Input Voltage VIN(V)
C
D
Pin Output Current I
CD
(mA)
012 435
0.6
V
DS
=0.5V
Topt=-40°C
85°C
25°C
R3112x
19
9) CD Pin Output Current vs. VDS (Topt=25°C)
R3112x091x R3112x131x
0.7
0.6
0.3
0.2
0.1
0
VDS(V)
CD Pin Output Current ICD(mA)
0 0.2 0.4 0.6 0.8 1
0.4
0.5
Topt=25°C
V
DD
=0.85V
0.7V
1.0
0.7
0.3
0.2
0.1
0
V
DS
(V)
C
D
Pin Output Current I
CD
(mA)
0 0.2 0.4 0.6 0.8 1
0.6
0.8
0.9
0.4
0.5
Topt=25°C
VDD=1.0V
0.85V
0.7V
R3112x271x R3112x451x
3.0
2.0
1.0
0.5
0
V
DS
(V)
C
D
Pin Output Current I
CD
(mA)
0 0.5 1 1.5 2 2.5
2.5
1.5
Topt=25°C
VDD=2.5V
1.0V
1.5V
2.0V
4.5
2.0
1.0
0.5
0
VDS(V)
CD Pin Output Current ICD(mA)
0 0.5 1.5 2.5 3.5 41 2 3
2.5
3.0
3.5
4.0
1.5
Topt=25°C
V
DD
=4.0V
1.0V
2.0V
1.5V
2.5V
3.5V 3.0V
10) Output Delay Time vs. External Capacitance (To pt=25°C)
R3112x091x R3112x131x
1000
0.01
External Capacitance CD(μF)
Output Deley Time tx(ms)
0.0001 0.001 0.01 0.1
0.1
1
10
100
Topt=25°C
t
PHL
t
D
1000
0.01
External Capacitance CD(μF)
Output Delay tx(ms)
0.0001 0.001 0.01 0.1
0.1
1
10
100
Topt=25°C
t
PHL
t
D
R3112x
20
R3112x271x R3112x451x
1000
0.01
External Capacitance C
D
(μF)
Output Delay Time tx(ms)
0.0001 0.001 0.01 0.1
0.1
1
10
100
Topt=25°C
t
PHL
t
D
1000
0.01
External Capacitance C
D
(μF)
Output Delay Time tx(ms)
0.0001 0.001 0.01 0.1
0.1
1
10
100
Topt=25°C
t
PHL
t
D
11) Delay Circuit Resistance vs. Temperature
R3112xxx1x
13
4
3
Temperature Topt(°C)
Delay Circuit Resistance RD(MΩ)
-50 -25 75 1000 25 50
7
6
5
8
9
12
11
10
R3112x
21
TECHNICAL NOTES
VDD
R
VDD
GND OUT
R3112x
V
DD
R1
R2
V
DD
GND OUT
R3112x
V
DD
R1
R2
V
DD
GND OUT
R3112x
Figure A Figure B Figure C
When R3112xxx1A (Nch open drain output type) is used in Figure A or Figure B, if impedance of voltage
supply pIn, VDD and VDD of this IC is large, detector threshold level would shift by voltage dropdown caused by
the consumption current of the IC itself. Released voltage may also shift and delay time for start-up might be
generated by this usage.
When R3112xxx1C (CMOS output type) is used in Figure A or Figure B, Output level could be unstable by
cross conduction current which is g enerated at detector thre shold level or at release d voltage l evel, therefore, do
not use R3112xxx1C with the connection in Figure A or Figure B.
The connection in Figure C may cause the oscillation in both R3112 xxx1C (CMOS Output) and R3112xxx1A
(Nch Open Drain Output), therefore do not use R3112xxx1x Series with the connection in Figure C.
