Overview
The NCP302HSN18T1G 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. This combination prevents erratic system reset operations, making it ideal for applications requiring reliable voltage monitoring.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Detector Threshold (Pin 2, Vin Decreasing) | VDET− | 1.764 | 1.8 | 1.836 | V |
| Detector Threshold Hysteresis (Pin 2, Vin Increasing) | VHYS | 0.054 | 0.090 | 0.126 | V |
| Supply Current (Pin 2) | Iin | 0.20 | 0.45 | 0.6 | μA |
| Maximum Operating Voltage (Pin 2) | Vin(max) | 10 | V | ||
| Minimum Operating Voltage (Pin 2) | Vin(min) | 0.55 | 0.65 | 0.70 | V |
| Quiescent Current | 0.5 | μA | |||
| Operating Ambient Temperature Range | TA | −40 | 125 | °C | |
| Reset Output Current (Pin 1, Active Low ‘L’ Suffix Devices) | IOUT | 0.01 | 1.0 | 2.0 | mA |
Key Features
- Ultra-low quiescent current of 0.5 μA typical, ensuring extended battery life in portable systems.
- High accuracy undervoltage detector with hysteresis to prevent erratic system reset operations.
- Externally programmable time delay generator to customize the reset timing according to system requirements.
- Wide operating voltage range of 0.8 V to 10 V, making it versatile for various applications.
- Complementary or open drain output configurations, including active low and active high reset options.
- Specified over a broad temperature range of −40°C to +125°C, ensuring reliability in diverse environments.
- Pb-free and RoHS compliant, with AEC-Q100 qualification for automotive and other critical applications.
Applications
- Microprocessor Reset Controller: Ensures reliable system reset in microprocessor-based systems.
- Low Battery Detection: Monitors battery voltage levels to prevent system malfunction due to low battery conditions.
- Power Fail Indicator: Detects power failures and initiates appropriate system responses.
- Battery Backup Detection: Monitors the transition between primary and backup power sources.
Q & A
- What is the primary function of the NCP302HSN18T1G?
The primary function is to act as an ultra-low current voltage detector with a programmable time delay generator, typically used as a reset controller in microprocessor-based systems.
- What is the quiescent current of the NCP302HSN18T1G?
The quiescent current is 0.5 μA typical.
- What is the operating voltage range of the NCP302HSN18T1G?
The operating voltage range is from 0.8 V to 10 V.
- What types of output configurations are available for the NCP302HSN18T1G?
The device is available with complementary or open drain output configurations, including active low and active high reset options.
- What is the temperature range over which the NCP302HSN18T1G is specified?
The device is specified over a temperature range of −40°C to +125°C.
- Is the NCP302HSN18T1G compliant with automotive standards?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other critical applications.
- What is the detector threshold voltage for the NCP302HSN18T1G?
The detector threshold voltage is 1.8 V with a hysteresis of 0.090 V.
- How is the time delay programmed in the NCP302HSN18T1G?
The time delay is externally programmable using a capacitor connected to the CD pin.
- What are some typical applications of the NCP302HSN18T1G?
Typical applications include microprocessor reset controllers, low battery detection, power fail indicators, and battery backup detection.
- Is the NCP302HSN18T1G Pb-free and RoHS compliant?
Yes, the device is Pb-free and RoHS compliant.
