Ricoh R3111x Series - Manual

R3111x SERIES
LOW VOLTAGE DETECTOR
NO.EA-056-120423
1
OUTLINE
The R3111x 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, resistors for detector threshold setting,
an output driver and a hysteresis circuit. The detector threshold is fixed with high accuracy internally and does
not require any adjustment.
Three output types, Nch open drain “L” type, Nch open drain “H” type and CMOS type are available.
The R3111x Series are operable at a lower voltage than that for the Rx5VL series, and can be driven by a
single battery.
Seven types of packages, TO-92 ( Discontinued ), SOT-89, SOT-23-3, SOT-23-5, SC-82AB, SC-88A and
SON1612-6 are available.
FEATURES
• Supply Current ......................................................................Typ. 0.8μA (-V
DET
=1.5V, V
DD
=-V
DET
−0.1V)
• Operating Voltage Range......................................................0.7V to 10.0V (T
opt
=25°C)
• Detector Threshold Range.................................................... 0.9V to 6.0V (0.1V steps)
(
For other voltages, please refer to MARK INFORMATIONS.)
• Detector Threshold Accuracy................................................±2.0%
• Temperature-Drift Coefficient of Detector Threshold ............Typ. ±100ppm/°C
• Output Types.........................................................................Nch Open Drain “L”, Nch Open Drain “H”, and
CMOS
• Packages ..............................................................................SON1612-6, SC-82AB, SC-88A, SOT-23-3,
SOT-23-5, SOT-89, TO-92 (
Discontinued )
APPLICATIONS
• CPU and Logic Circuit Reset
• Battery Checker
• Window Comparator
• Wave Shaping Circuit
• Battery Back-up Circuit
• Power Failure Detector