Overview
The NCP303LSN49T1G is a second-generation ultra-low current voltage detector from onsemi, designed for use in portable microprocessor-based systems where extended battery life is crucial. This device features a highly accurate undervoltage detector with hysteresis and an externally programmable time delay generator, preventing erratic system reset operations.
Key Specifications
| Characteristic | Unit | Typical | Minimum | Maximum |
|---|---|---|---|---|
| Input Power Supply Voltage (Pin 2) | V | - | 0.8 | 10 |
| Quiescent Current | μA | 0.5 | - | 1.3 |
| Detector Threshold (Vin Decreasing) | V | 4.365 | 4.410 | 4.590 |
| Detector Threshold Hysteresis | V | 0.225 | 0.135 | 0.315 |
| Reset Output Current (Active Low) | mA | - | 0.01 | 2.0 |
| Operating Ambient Temperature Range | °C | -40 to +125 | - | - |
| Delay Capacitor Pin Threshold Voltage | V | 2.01 | 1.49 | 2.53 |
Key Features
- Ultra-low quiescent current of 0.5 μA typical
- High accuracy undervoltage threshold with 2.0% tolerance
- Externally programmable time delay generator
- Wide operating voltage range of 0.8 V to 10 V
- Complementary or open drain output configurations
- Active low or active high reset options
- AEC-Q100 qualified and PPAP capable for automotive and other critical applications
- Pb-free and RoHS compliant
Applications
- Microprocessor reset controller
- Low battery detection
- Power fail indicator
- Battery backup detection
Q & A
- What is the primary function of the NCP303LSN49T1G?
The primary function of the NCP303LSN49T1G is to act as a voltage detector and reset controller in microprocessor-based systems, ensuring reliable operation and preventing erratic resets.
- What is the typical quiescent current of the NCP303LSN49T1G?
The typical quiescent current is 0.5 μA.
- What is the operating voltage range of the NCP303LSN49T1G?
The operating voltage range is from 0.8 V to 10 V.
- What types of output configurations are available for the NCP303LSN49T1G?
The device is available with either complementary or open drain output configurations.
- Can the NCP303LSN49T1G be used in automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other critical applications.
- What is the temperature range for the NCP303LSN49T1G?
The operating ambient temperature range is from -40°C to +125°C.
- How is the time delay programmable in the NCP303LSN49T1G?
The time delay is programmable using an external capacitor connected to the delay capacitor pin.
- Is the NCP303LSN49T1G Pb-free and RoHS compliant?
Yes, the device is Pb-free and RoHS compliant.
- What are some typical applications for the NCP303LSN49T1G?
Typical applications include microprocessor reset controllers, low battery detection, power fail indicators, and battery backup detection.
- What is the detector threshold hysteresis for the NCP303LSN49T1G?
The detector threshold hysteresis is typically 0.225 V.
- How does the NCP303LSN49T1G ensure reliable system operation?
The device ensures reliable system operation through its highly accurate undervoltage detection with hysteresis and an externally programmable time delay generator, preventing erratic system resets.
