RICOH R3117xxx1 2 SERIES LOW VOLTAGE DETECTOR with SENSE pin User Manual & Data Sheet
Summary
Monitor the health of your electronic systems with the R3117x series CMOS Voltage Detector ICs. These highly accurate, ultra-low power components are engineered for reliable system reset and robust power failure detection by precisely monitoring supply voltage drops. Our comprehensive guide details key specifications, including customizable thresholds (0.7V to 5.0V) and multiple output configurations suitable for challenging embedded designs. Ideal for electrical engineers designing CPU logic circuits, battery checkers, and general power management applications requiring dependable, low-quiescent current voltage fault detection across various packages.
Page 1 Text Content
R3117xxx1/2 SERIES
LOW VOLTAGE DETECTOR with SENSE pin
NO.EA-186-111104
Notice
If the SENSE pin voltage of R3117xxx1A/C and R3117Qxx2A/C make the gradual curve by rasing 0.5V/ms or less, it may cause noise when the output voltage is switched from low to high.Please use R3117xxx3A/C and R3117Qxx4A/C Series for new designs instead of these products to avoid the above problem.
OUTLINE The R3117x 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. The tolerance of the detector threshold is ±15m V (-VDET 1.5V) or ±1.0% (1.5V< -VDET). Since the sense pin is separated from the VDD pin of the IC, therefore, even if the sense pin voltage becomes to 0V, the output voltage keeps its "L" level. Two output types, Nch open drain type and CMOS type are available. Three types of packages, SOT-23-5, SC-88A, and DFN(PLP)1010-4 are available.
FEATURES∗ • Supply Current ......................................................................Typ. 0.29μA (VDD=6.0V)
Consumption current through SENSE pin is not included.
• Operating Voltage Range......................................................1.0V to 6.0V (-40°C Topt 105°C) • Detector Threshold Range....................................................0.7V to 5.0V (0.1V steps) (For other voltages, please refer to MARK INFORMATIONS.) • Accuracy Detector Threshold................................................±1.0% (-VDET 1.6V), ±15m V (-VDET<1.6V) • Temperature-Drift Coefficient of Detector Threshold ............Typ. ±30ppm/°C • Output Types.........................................................................Nch Open Drain and CMOS • Packages ..............................................................................DFN(PLP)1010-4, SC-88A, SOT-23-5
∗ Topt=25°C, unless otherwise noted.
APPLICATIONS • CPU and Logic Circuit Reset • Battery Checker • Window Comparator • Wave Shaping Circuit • Battery Back-up Circuit • Power Failure Detector
Page Summary Contents For RICOH R3117xxx1 2 SERIES LOW VOLTAGE DETECTOR with SENSE pin User Manual & Data Sheet
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 21 |
| File Size | 414.70 KB |
| Published | May 27, 2026 |
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Frequently Asked Questions
Why should I use the R3117xxx3A/C series for new designs?
R3117xxx1A/C and R3117Qxx2A/C may cause noise when switching output voltage from low to high, so R3117xxx3A/C or R3117Qxx4A/C should be used instead.
What is the typical supply current for this detector?
The typical supply current is 0.29μA when operating at VDD=6.0V (excluding SENSE pin consumption).
Do I need to adjust the detector threshold?
No, the detector threshold is fixed with high accuracy internally and does not require any adjustment.
What voltage range can this IC operate within?
It operates across a voltage range of 1.0V to 6.0V (at -40°C Topt 105°C).
Which package types are available for the R3117 series?
Three packages are available: SOT-23-5, SC-88A, and DFN(PLP)1010-4.