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Description
The R3111x series is a group of CMOS-based voltage detector ICs with high detector threshold accuracy and ultra-low supply current. These ICs are used for system reset and consist of a voltage reference unit, a comparator, resistors for detector threshold setting, an output driver, and a hysteresis circuit. With a fixed detector threshold of high accuracy, these ICs do not require any adjustment. Additionally, these voltage detectors have three output types, Nch open drain “L” type, Nch open drain “H” type, and CMOS type. Moreover, the R3111x series can be operated at an extremely low voltage and driven by a single battery. These ICs come in six types of packages: TO-92, SOT-89, SOT-23-3, SOT-23-5, SC-82AB, and SON1612-6.
Specifications and features
- Supply Current: Typ. 0.8µA (VDD=1.5V)
- Range of Operating Voltage: 0.7V to 10.0V (Topt=25°C)
- Detector Threshold: 0.9V to 6.0V
- Accuracy Detector Threshold: ±2.0%
- Temperature-Drift Coefficient of Detector Threshold: Typ. ±100ppm/°C
- Output Types: Nch Open Drain “L”, Nch Open Drain “H”, and CMOS
- Packages: TO-92, SOT-89, SOT-23-3, SOT-23-5, 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
Advantages- High detector threshold accuracy
- Ultra-low supply current
- Fixed detector threshold with high accuracy, requiring no adjustment
- Three output types
- Can be operated at extremely low voltage and driven by a single battery
- Six types of packages available
Disadvantages- The temperature-drift coefficient of detector threshold may not be suitable for certain applications.
- May not be appropriate for applications requiring a detector threshold outside the range of 0.9V to 6.0V
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