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Description
The R3112x Series is a CMOS-based voltage detector IC with high detector threshold accuracy and ultra-low supply current. It is commonly used for system reset. The IC 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 internally with high accuracy and does not require any adjustment. Two output types, Nch open drain type and CMOS type, are available. Three types of packages, SOT-23-5, small SC-82AB, and ultra-small SON1612-6, can be selected for high-density mounting on boards.
Specifications and features
- Built-in Output Delay Circuit: Typ. 100ms (with an external capacitor: 0.022μF)
- Supply Current: Typ. 0.5μA (R3112x271A/C, VDD=2.6V)
- Operating Voltage: 0.7 to 6.0V (Topt=25°C)
- Detector Threshold: 0.9V to 5.0V
- High Accuracy Detector Threshold: ±2.0%
- Low Temperature-Drift Coefficient of Detector Threshold: Typ. ±100ppm/°C
- Two Output Types: Nch Open Drain and CMOS
- Packages: SOT-23-5 (Mini-mold), SC-82AB, SON1612-6
Application Scenarios
- CPU and Logic Circuit Reset
- Battery Checker
- Window Comparator
- Wave Shaping Circuit
- Battery Back-up Circuit
- Power Failure Detector
Comparison
AdvantagesThe R3112x Series offers high detector threshold accuracy and ultra-low supply current. It is highly reliable and can be operated at an extremely low voltage.
DisadvantagesNo specific disadvantages have been reported for the R3112x Series. However, it is important to note that this IC may not be suitable for applications requiring a voltage range higher than 6.0V.
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Datasheet
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