R3112x Series
Low Input VD with Delay Function
The R3112x Series are CMOS-based voltage detector ICs with the built-in output delay circuit, which can operate at low voltage.
The delay time can be set with an external capacitor.
FEATURES
•
Supply Current (I
SS1
) ·······················Typ. 0.5μA (V
DD
=-V
DET
+1V, R3112x15x)
•
Operating Voltage Range (V
DD
) ······0.7V to 6.0V (Topt=25°C)
•
Detector Threshold Range (-V
DET
)·····0.9V to 5.0V (internally fixed)
•
Output Delay ·································Typ. 100ms delay set with a 0.022μF external
•
Reset Signal ···································"L"
capacitor
•
Detector Threshold Accuracy ·······
±
2%
•
Temp. coeff. of Detector Threshold ··· Typ.
±
100ppm/°C
•
Two Output Types ·························· Nch. Open Drain and CMOS
•
Packages········································ SON1612-6, SC-82AB,
SC-88A, SOT-23-5
BLOCK DIAGRAMS
R3112xxxxA
(Nch. open drain output)
R3112xxxxC
(CMOS output)
V
DD
R
D
OUT
V
DD
R
D
OUT
Vref
GND
Vref
GND
C
D
C
D
SELECTION GUIDES
Package
SON1612-6
SC-82AB
SC-88A
SOT-23-5
Quantity per Reel
4,000 pcs
3,000 pcs
3,000 pcs
3,000 pcs
Part No.
R3112D.xx.1.
∗
-TR-F
R3112Q.xx.1.
∗
-TR-F
R3112Q.xx.2.
∗
-TR-F
R3112N.xx.1.
∗
-TR-F
TIMING CHART
Release Voltage
+V
DET
Supply
Voltage Detector Threshold
-V
DET
(V
DD
)
Minimum Operating
V
DDL
Voltage
GND
Pull-up Voltage
Output
Voltage
(V
OUT
)
Hysteresis
Hysteresis
.xx.
: Specify the detector threshold within the range
0.9V (.09.) to 5.0V (.50.) in 0.1V steps.
.∗
: Select the output type from (.A.) Nch. open drain or (.C.) CMOS.
GND
t
PHL
R3112xxxxA
t
D
t
PHL
R3112xxxxC
t
D
PACKAGES (Top View)
SON1612-6
6
5
4
HOW TO DETERMINE DELAY TIME
SOT-23-5
5
4
4
SC-82AB
4
3
SC-88A
5
Letting the capacity of an external capacitor C
D
(F),
the delay time (t
D
) is found from the following equation:
t
D
=0.69
×
6.5
×
10
×
C
D
(s)
6
1
2
3
1
2
3
1
2
1
2
3
1
2
3
4
5
6
OUT
GND
C
D
NC
GND
V
DD
1
2
3
4
V
DD
GND
C
D
OUT
1
2
3
4
5
V
DD
NC
GND
C
D
OUT
1
2
3
4
5
OUT
V
DD
GND
NC
C
D
APPLICATIONS
•
Microcontroller and logic circuit reset
•
Battery checker
•
Window comparator
•
Wave shaping circuit
•
Battery back-up circuit
•
Power failure detector
No.EK-091-091101
CMOS Voltage Detector
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