R3112X091A Datasheet, PDF (1/16 Pages) RICOH electronics devices division – LOW VOLTAGE DETECTOR WITH OUTPUT DELAY

2001. Apr. 4
LOW VOLTAGE DETECTOR WITH OUTPUT DELAY
R3112xxx1A/C Series
s OUTLINE
The R3112 Series are voltage detector ICs with high detector threshold accuracy and ultra-low
supply current by CMOS process, 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.
Two types of packages, SOT-23-5 and ultra small SC-82AB can be selected so that high density
mounting on boards is possible.
s FEATURES
qBuilt-in Output Delay Circuit• • • • • • • • • • •TYP. 100ms with an external capacitor: 0.022µF
qUltra-low Supply Current• • • • • • • • • • •TYP. 1.0µA (VDD=3.5V)
qWide Range of Operating Voltage • • • • • •0.7∼6.0V(Topt=25°C)
qDetector Threshold • • • • • • • • •Stepwise setting with a step of 0.1V in the range of 0.9V to 5.0V
is possible.
qHigh Accuracy Detector Threshold • • • • • • • ±2.0%
qLow Temperature-Drift Coefficient of Detector Threshold• • • • • • • • • TYP. ±100ppm/°C
qTwo Output Types• • • • • • • • • • • • • • • • • • • Nch Open Drain and CMOS
qTwo Types of Packages • • • • • • • • • • SOT-23-5 (Mini-mold), SC-82AB
s APPLICATIONS
• CPU and Logic Circuit Reset
• Battery Checker
• Window Comparator
• Wave Shaping Circuit
• Battery Back-up Circuit
• Power Failure Detector
s BLOCK DIAGRAMS
R3112XXX1A
VDD
RD
+
-
Vref
CD
R3112XXX1C
VDD
OUT
RD
+
OUT
--
Vref
GND
GND
CD
Rev. 1.10
-1-