R3112x Series
Voltage Detector with Delay Function (External Capacitor Type)
The R3112x Series are CMOS-based voltage detector ICs with the built-in output delay circuit. The delay time can be set with an
external capacitor.
FEATURES
•
Supply Current (I
SS
) ························ Typ. 0.5μA (V
DD
=-V
SET
+1.0V, R3112x15x)
•
Operating Voltage Range (V
DD
) ······ 0.7V to 6.0V
•
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
Halogen Free
Package
SON1612-6
SC-82AB
SC-88A
SOT-23-5
Q'ty per Reel
4,000 pcs
3,000 pcs
3,000 pcs
3,000 pcs
Part No.
R3112D.xx.1.
∗
-TR-FE
R3112Q.xx.1.
∗
-TR-FE
R3112Q.xx.2.
∗
-TR-FE
R3112N.xx.1.
∗
-TR-FE
TIMING CHARTS
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
.xx.
: Specify the detector threshold within the range of
0.9V (.09.) to 5.0V (.50.) in 0.1V steps.
.∗
: Select the output type from (.A.) Nch. open drain or (.C.) CMOS.
HOW TO DETERMINE DELAY TIME
Let the capacity of an external capacitor "C
D
" (F),
the delay time (t
D
) is found from the following equation:
t
D
(s)=0.69
×
6.5
×
10
×
C
D
6
GND
t
PHL
R3112xxxxA
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
)
t
D
PACKAGES (Top View)
SON1612-6
6
5
4
Hysteresis
SC-82AB
4
3
SC-88A
5
4
SOT-23-5
5
4
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
GND
t
PHL
R3112xxxxC
t
D
APPLICATIONS
•
Microcontroller and logic circuit reset
•
Wave shaping circuit
No.EK-087-121001
•
Battery checker
•
Battery back-up circuit
•
Window comparator
•
Power failure detector
CMOS Voltage Detector
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deciding to use the products, please refer to Ricoh sales representatives for the latest
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example application circuits for the products. The release of such information is not to be
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Halogen Free
For the conservation of the global environment, Ricoh is advancing the decrease of the negative environmental impact material.
After Apr. 1, 2006, we will ship out the lead free products only. Thus, all products that will be shipped from now on comply with RoHS Directive.
Basically after Apr. 1, 2012, we will ship out the Power Management ICs of the Halogen Free products only. (Ricoh Halogen Free products are
also Antimony Free.)
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