R3112x SERIES
LOW VOLTAGE DETECTOR WITH OUTPUT DELAY
NO. EA-087-090422
OUTLINE
The R3112x 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, resistor net for detector threshold setting,
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. 0.5μA (R3112x271A/C, V
DD
=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 Temperature-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
1
R3112x
BLOCK DIAGRAMS
R3112xxx1A
V
DD
R
D
OUT V
DD
R
D
R3112xxx1C
+
-
Vref
GND
+
OUT
-
Vref
GND
C
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
↑ ↑ ↑↑ ↑ ↑
a bcd e f
Code
←
Part Number
Contents
Designation of Package Type;
R3112Dxx1x: SON1612-6
R3112Nxx1x: SOT-23-5
R3112Qxx1x: SC-82AB
R3112Qxx2x: SC-88A
Setting Detector Threshold (−V
DET
);
Stepwise setting with a step of 0.1V in the range of 0.9V to 5.0V is possible.
Designation of Package Type
1: except SC-88A
2: SC-88A
Designation of Output Type;
A: Nch Open Drain
C: CMOS
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)
a
b
c
d
e
2
R3112x
PIN CONFIGURATION
SOT-23-5
SC-82AB
4
3
SC-88A
SON1612-6
5
4
5
4
6
5
4
(mark side)
(mark side)
(mark side)
1
2
3
1
2
1
2
3
1
2
3
PIN DESCRIPTION
•
SOT-23-5
Pin No.
1
2
3
4
5
Symbol
OUT
V
DD
GND
NC
C
D
Description
Output Pin (Output “L” at
detector threshold, Output “H”
at released voltage)
Voltage Supply Pin
Ground Pin
No Connection
Pin for External Capacitor
(for setting output delay)
•SC-82AB
Pin No.
1
2
3
4
Symbol
V
DD
GND
C
D
OUT
Description
Voltage Supply Pin
Ground Pin
Pin for External Capacitor
(for setting output delay)
Output Pin (Output “L” at
detector threshold, Output “H”
at released voltage)
•
SC-88A
Pin No.
1
2
3
4
5
Symbol
V
DD
NC
GND
C
D
OUT
Description
Voltage Supply Pin
No Connection
Ground Pin
Pin for External Capacitor
(for setting output delay)
Output Pin (Output “L” at
detector threshold, Output “H”
at released voltage)
•SON1612-6
Pin No.
1
2
3
4
5
6
Symbol
OUT
GND
C
D
NC
GND
V
DD
Description
Output Pin (Output “L” at
detector threshold, Output “H”
at released voltage)
Ground Pin
Pin for External Capacitor
(for setting output delay)
No Connection
Ground Pin
Voltage Supply Pin
3
R3112x
ABSOLUTE MAXIMUM RATINGS
Symbol
V
DD
V
OUT1
V
OUT2
I
OUT
Supply Voltage
Output Voltage (CMOS)
Output Voltage (Nch)
Output Current
Power Dissipation (SOT-23-5)*
Power Dissipation (SC-82AB)*
Power Dissipation (SC-88A)*
Power Dissipation (SON1612-6)*
Operating Temperature Range
Storage Temperature Range
Lead temperature (Soldering)
Item
Rating
6.5
V
SS
−0.3
to V
DD
+0.3
V
SS
−0.3
to 6.5
20
420
380
380
500
−40
to 85
−55
to 125
260°C, 10s
Unit
V
V
V
mA
P
D
mW
T
opt
T
stg
T
solder
°C
°C
* ) 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 using the device
in the field. The functional operation at or over these absolute maximum ratings is not assured.
4
R3112x
•
ELECTRICAL CHARACTERISTICS
R3112x091A/C
Symbol
−V
DET
V
HYS
I
SS
V
DDH
V
DDL
Item
Detector Threshold
Detector Threshold Hysteresis
Supply Current
Maximum Operating Voltage
Minimum Operating Voltage
∗
Note1
T
opt
=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
V
DD
=0.99V
V
DS
=0.10V,
V
DD
=0.70V
V
DS
=0.50V,
V
DD
=0.85V
−40°C
<
=
<
=
Topt
=
25°C
Conditions
Min.
0.882
0.027
Typ.
0.900
0.045
0.6
0.5
Max.
0.918
0.063
2.0
2.0
6.0
0.70
0.80
Unit
V
V
μ
A
V
V
μA
mA
mA
V
DD
=0.80V
V
DD
=1.90V
10
0.05
1.0
0.297
2
10
3.25
120
0.90
3.5
0.495
70
400
6.50
±100
13.00
0.693
I
OUT
Output Current (Driver Output Pin)
V
TCD
I
CD
R
D
Δ−V
DET
/
ΔTopt
CD pin Threshold Voltage
CD pin Output Current
Output Delay Resistance
Detector Threshold
Temperature Coefficient
V
μA
MΩ
ppm/
°C
Topt
85°C
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate 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 surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
5
单片机
