RICOH R3132x R3133x SERIES Owner's Manual User Guide
Summary
Monitor your embedded systems using these precise CMOS low voltage detector ICs. Featuring built-in delay circuits and high detection accuracy, they function reliably as system reset generators even at minimal voltages (0.8V–6.0V). The manual covers full technical specifications, detailing threshold setting options, Nch Open Drain and CMOS outputs, and suitability for various applications like battery health monitoring and CPU circuitry resets. Ideal for electronics designers needing stable power management solutions in compact formats.
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R3132x/R3133x SERIES
LOW VOLTAGE DETECTOR WITH BUILT-IN DELAY CIRCUIT
NO.EA-093-120404
Notice
R3133Q Series scheduled to be discontinued (be sold to limited customer): "Limited"
OUTLINE R3132x/R3133x Series are CMOS-based low voltage detector ICs with built-in delay circuit, high detector threshold accuracy, and ultra low supply current, which can operate at low voltage. These ICs can be used as system reset generators, and each of these ICs consists of a voltage reference, a comparator, resistors for setting voltage detector threshold, an output driver transistor, manual reset circuit, and an output delay generator. Detector threshold is fixed internally with high accuracy and requires no adjustment. When a supply voltage crosses a setting detector threshold voltage from a high value to a lower value, this IC generates reset signal. R3132x Series output “L” at its detect, while R3133x Series output “H”. Since each of R3132x/R3133x Series embeds an output delay generator, during a setting 240ms delay time, which is fixed in the IC, this IC keeps the reset condition after they are released. Released conditions are the case when a supply voltage crosses a setting detector threshold voltage from a low value to a higher value, or when this IC is released from manual reset. Two output types, Nch open drain type and CMOS type, are available. Since the package for these ICs are ultra small SC-82AB package and SON1612-6, high density mounting of the ICs on board is possible.
FEATURES • Supply current .......................................................................Typ. 0.8μA (R313xx27x: VDD=3.0V) • Operating Voltage Range......................................................0.8V to 6.0V (Topt=25°C) • Detector Threshold................................................................Setting with a step of 0.1V in the range of 1.0V
to 5.0V is possible. Further, 2.32V, 2.63V, 2.93V, 3.08V, 4.38V, and 4.63V can be provided as standard.
• Embedded Power on Reset Delay Time Circuit....................Typ. 240ms • Detector Threshold Accuracy................................................±2.0% • Released Delay Time Accuracy ............................................±15.0% • Temperature-Drift Coefficient of Detector Threshold ............Typ. ±100ppm/°C • Output Types.........................................................................Nch Open Drain and CMOS • Packages ..............................................................................SC-82AB, SON1612-6
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 R3132x R3133x SERIES Owner's Manual User Guide
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 28 |
| File Size | 394.54 KB |
| Published | May 31, 2026 |
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Frequently Asked Questions
What voltage drop triggers the reset signal?
The IC generates a reset signal when the supply voltage crosses its detector threshold from a high value to a lower value.
How long is the output maintained after a supply voltage drops?
The embedded delay circuit maintains the reset condition for approximately 240ms.
What is the selectable range and step size for setting the detection threshold?
The detector threshold can be set in the range of 1.0V to 5.0V, with a selectable step of 0.1V.