LOW VOLTAGE DETECTOR WITH BUILT-IN
DELAY CIRCUIT
R3132x/R3133x SERIES
OUTLINE
NO. EA-093-080701
R3132x/R3133x Series are CMOS-based low voltage detector ICs with built-in delay circuit, high detector
threshold accuracy, and ultra low supply current, which can operate at low voltage.
These ICs can be used as system reset generators, and each of these ICs consists of a voltage reference, a
comparator, resistors for setting voltage detector threshold, an output driver transistor, manual reset circuit, and
an output delay generator.
Detector threshold is fixed internally with high accuracy and requires no adjustment. When a supply voltage
crosses a setting detector threshold voltage from a high value to a lower value, this IC generates reset signal.
R3132x Series output “L” at its detect, while R3133x Series output “H”.
Since each of R3132x/R3133x Series embeds an output delay generator, during a setting 240ms delay time,
which is fixed in the IC, this IC keeps the reset condition after they are released. Released conditions are the
case when a supply voltage crosses a setting detector threshold voltage from a low value to a higher value, or
when this IC is released from manual reset.
Two output types, Nch open drain type and CMOS type, are available.
Since the package for these ICs are ultra small SC-82AB package and SON1612-6, high density mounting of
the ICs on board is possible.
FEATURES
•
Ultra-low supply current ........................................................Typ. 0.8µA (R313xx27x: V
DD
=3.0V)
•
Operating Voltage Range......................................................0.8V to 6.0V (Topt=25°C)
•
Detector Threshold................................................................Setting with a step of 0.1V in the range of 1.0V
to 5.0V is possible. Further, 2.32V, 2.63V, 2.93V,
3.08V, 4.38V, and 4.63V can be provided as
standard.
•
Embedded Power on Reset Delay Time Circuit....................Typ. 240ms
•
High Accuracy Detector Threshold .......................................±2.0%
•
High Accuracy Released Delay Time....................................±15.0%
•
Low Temperature-Drift Coefficient of Detector Threshold.....Typ.
±100ppm/°C
•
Two Output Types .................................................................Nch Open Drain and CMOS
•
Small Packages ....................................................................SC-82AB, SON1612-6
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R3132x/R3133x
APPLICATIONS
•
•
•
•
•
•
CPU & Logic Circuit Reset
Battery Checker
Window Comparator
Wave Shaping Circuit
Battery Backup Circuit
Power Failure Detector
BLOCK DIAGRAMS
R3132xxxEA Nch Open Drain Output
R3132xxxEC CMOS Output
V
DD
-
+
Vref
MR
V
DD
-
MR
Delay
Circuit
OUT
Vref
+
Delay
Circuit
OUT
GND
GND
R3133xxxEA Nch Open Drain Output
R3133xxxEC CMOS Output
V
DD
-
+
Vref
MR
V
DD
-
MR
Delay
Circuit
V
OUT
Vref
+
Delay
Circuit
OUT
GND
GND
2
R3132x/R3133x
TIMING CHART
Detector
Threshold
Power
V
DET
Supply
Minimum
(V
DD
)
Operating
Voltage
V
SS
Detector
Threshold
V
DET
Supply
Voltage Minimum
(V
DD
) Operating
Voltage
V
SS
Manual
Reset
V
SS
Manual
Reset
V
SS
Output Voltage
V
SS
Tdelay
Tdelay
Output
Voltage
V
SS
Tdelay
Tdelay
R3132x Operation Diagram
R3133x Operation Diagram
•
Output Delay Operation
Output Delay Time, or Tdelay is specified as follows:
1. In the case of Nch Open Drain Output:
The time interval from rising edge of V
DD
pulse (0.8V→(V
DET
)+1.0V) to the time at which the output reaches
2.5V under the condition that the output pin (OUT) is pulled up to 5V through a 470kΩ resistor.
2. In the case of CMOS Output:
The time interval from rising edge of V
DD
pulse (0.8V→(V
DET
)+1.0V) to the time at the output reaches V
DD
/2.
+V
DET
+1.0V
+V
DET
+1.0V
Input Voltage
(V
DD
)
Input Voltage
(V
DD
)
0.8V
GND
0.8V
GND
5.0V
Output Voltage
2.5V
+V
DET
+1.0V
Output Voltage
(V
DET
+1.0V)/2
GND
Trst
Tdelay
GND
Trst
Tdelay
Nch Open Drain Output
CMOS Output
3
R3132x/R3133x
SELECTION GUIDE
The detector threshold and the output type of R3132x/R3133x Series can be designated at the user’s request
by specifying the part number as follows:
R3132xxxEx (x)-xx-x
R3133xxxEx (x)-xx-x
↑↑
a b
Code
a
↑ ↑
c b’
↑ ↑
d e
←Part
Number
Contents
Package Designation
Q: SC-82AB
D: SON1612-6
Setting Detector Threshold (V
DET
)
Stepwise setting with a step of 0.1V in the range of 1.0V to 5.0V is possible.
a’ describes the last digit of the next items; 2.32V/2.63V/2.93V/3.08V/4.63V
ex. 2.63V Output
→
R313xx26Ex3-TR
Designation of Output type
A: Nch Open Drain
C: CMOS
TR: Designation of Taping Direction
(Refer to Taping Specification)
Designation of Composition of pin plating
-F: Lead free solder plating (SC-82AB, SON1612-6)
b/b’
c
d
e
PIN CONFIGURATION
SC-82AB
SON1612-6
6
5
4
4
3
(mark side)
(mark side)
1
2
1
2
3
4
R3132x/R3133x
PIN DESCRIPTION
•
SC-82AB
Pin No.
1
2
Symbol
GND
OUT
Description
Ground Pin
Output Pin
R3132Q Series: Output “L” at detect, Output “H” at release.
R3133Q Series: Output “H” at detect, Output “L” at release.
Manual Reset Input Pin
Active at “L” input. Pulled up via 1MΩ. If MR pin is not necessary,
open this node, or connect to V
DD
.
Input Pin
3
4
MR
V
DD
•
SON1612-6
Pin No.
1
2
3
Symbol
V
DD
GND
MR
Description
Input Pin
Ground Pin
Manual Reset Input Pin
Active at “L” input. Pulled up via 1MΩ. If MR pin is not necessary,
open this node, or connect to V
DD
.
Output Pin
R3132D Series: Output “L” at detect, Output “H” at release.
R3133D Series: Output “H” at detect, Output “L” at release.
Ground Pin
No Connection
4
5
6
OUT
GND
NC
ABSOLUTE MAXIMUM RATINGS
Symbol
V
DD
V
OUT
V
MR
I
OUT
P
D
Topt
Tstg
Tsolder
Item
Supply Voltage
Output Voltage
Input Voltage
Output Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Soldering Temperature
Rating
6.5
CMOS V
SS
−0.3
to V
DD
+0.3
Nch
V
SS
−0.3
to 6.5
V
SS
−0.3
to V
DD
+0.3
20
150(SC-82AB)
500(SON1612-6)
∗
Note1
−40
to
+85
−55
to
+125
260°C, 10s
Unit
V
V
V
V
mA
mW
°C
°C
∗Note
1: This specification is at mounted on board.
P
D
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%
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are threshold limit values that must not be exceeded even for a moment under any conditions.
Moreover, such values for any items must not be reached simultaneously. Operation above these absolute maximum ratings
may cause degradation or permanent damage to the device. These are just stress ratings and do not necessarily imply to
guarantee operation below these limits.
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