RICOH LOW VOLTAGE DETECTOR R3111xxx1A C Series User Manual and Specifications
Summary
The R3111 Series provides highly accurate, ultra-low power voltage detector ICs essential for clean system reset and reliable power management in sensitive electronics. Designed to operate at extremely low voltages with minimal current draw, this device monitors supply fluctuations from 0.7V to 10.0V. This manual is a comprehensive guide for engineers selecting the ideal configuration—including package type, adjustable threshold voltage, and output format (Nch Open Drain or CMOS). It covers detailed circuit diagrams and application examples for uses ranging from CPU reset circuits to sophisticated battery back-up detection, ensuring maximum system stability in power-critical applications.
Page 1 Text Content
’98.Dec.05
LOW VOLTAGE DETECTOR R3111xxx1A/C Series
■ OUTLINE The R3111 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, 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. Two output types, Nch open drain type and CMOS type are available. The R3111 Series are operable at a lower voltage than that for the RX5VL Series, and can be driven by a single battery. Four types of packages, TO-92, SOT-89, SOT-23-5 and SC-82AB are available.
■ FEATURES
● Ultra-low Supply Current TYP. 0.8µA (VDD=1.5V) ● Wide Range of Operating Voltage.................................................. 0.7 to 10.0V(Topt=25°C) ● Detector Threshold......................................................................... Stepwise setting with a step of 0.1V in the range of 0.9V to 6.0V is possible. ● High Accuracy Detector Threshold................................................ ±2.0% ● Low Temperature-Drift Coefficient of Detector Threshold............ TYP. ±100ppm/°C ● Two Output Types Nch Open Drain and CMOS ● Four Types of Packages.................................................................. TO-92, SOT-89(Mini-power Mold), SOT-23-5 (Mini- mold), SC-82AB
■ APPLICATIONS ● CPU and Logic Circuit Reset ● Battery Checker ● Window Comparator ● Wave Shaping Circuit ● Battery Back-up Circuit ● Power Failure Detector
■ BLOCK DIAGRAMS
R3111XXX1A R3111XXX1C
VDD VDD
Vref Vref
GND GND
Rev.1.10 - 1 -
Page Summary Contents For RICOH LOW VOLTAGE DETECTOR R3111xxx1A C Series User Manual and Specifications
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 20 |
| File Size | 206.97 KB |
| Published | May 27, 2026 |
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Frequently Asked Questions
What is the operating voltage range for the R3111 series?
It operates across a wide voltage range from 0.7V to 10.0V at 25°C.
How accurate is the detector threshold, and can it be adjusted?
The threshold has a high accuracy of ±2.0% and can be set in steps of 0.1V between 0.9V and 6.0V.
What output types are available for this IC?
Two output types are available: Nch Open Drain and CMOS type.
Which packages are compatible with the R3111 Series?
Four package types are available: TO-92, SOT-89, SOT-23-5, and SC-82AB.