Overview
The NCP308SN300T1G is a low quiescent current, programmable delay time supervisory circuit produced by onsemi. This device is part of the NCP308 series, designed to monitor system voltages and assert a RESET signal when the voltage drops below a specified threshold or when the Manual Reset (MR) input is driven low. It is available in both fixed and externally adjustable versions, making it versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage Range (VDD) | 1.6 | 5.5 | V | |
| Quiescent Current (IDD) | 1.6 | 5.0 | 6.0 | μA |
| Threshold Voltage (VIT) for 3.0V Version | 2.79 | 3.07 | V | |
| Threshold Voltage Accuracy | -1.75% | -0.31% | +1.75% | % |
| Hysteresis on VIT | 1.0% | 3.0% | 3.75% | %VIT |
| Reset Delay Time | 1.25 ms | 10 s | ||
| Temperature Range | -40°C | +125°C | °C | |
| Package Type | TSOP-6 |
Key Features
- Wide supply voltage range from 1.6 V to 5.5 V
- Very low quiescent current of 1.6 μA to 6.0 μA
- Fixed threshold voltage versions for standard voltage rails (e.g., 0.9 V, 1.2 V, 1.25 V, etc.) and adjustable version down to 0.405 V
- High threshold voltage accuracy of ±0.31% typical
- Manual Reset input (MR) with internal pull-up resistance of 90 kΩ
- Open-drain RESET output with optional push-pull configuration
- Flexible delay time programmability from 1.25 ms to 10 s using the CT pin
- Small TSOP-6 and WDFN6 2 x 2 mm, Pb-free packages
- AEC-Q100 qualified and PPAP capable for automotive and other critical applications
Applications
- DSP or Microcontroller Applications
- Notebook/Desktop Computers
- PDAs/Hand-Held Products
- Portable/Battery-Powered Products
- FPGA/ASIC Applications
Q & A
- What is the primary function of the NCP308SN300T1G? The primary function is to monitor system voltages and assert a RESET signal when the voltage drops below a specified threshold or when the Manual Reset input is driven low.
- What is the supply voltage range for the NCP308SN300T1G? The supply voltage range is from 1.6 V to 5.5 V.
- How low can the quiescent current be for this device? The quiescent current can be as low as 1.6 μA.
- What are the available threshold voltage options for the NCP308 series? The series includes fixed threshold voltage versions for standard voltage rails and an adjustable version that can monitor voltages down to 0.405 V.
- How is the reset delay time programmed? The reset delay time can be programmed using the CT pin, allowing for delay times from 1.25 ms to 10 s.
- What are the package options for the NCP308SN300T1G? The device is available in TSOP-6 and WDFN6 2 x 2 mm, Pb-free packages.
- Is the NCP308SN300T1G suitable for automotive applications? Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other critical applications.
- How does the Manual Reset input work? The Manual Reset input (MR) can be driven low to assert the RESET signal, and it has an internal pull-up resistance of 90 kΩ.
- What is the temperature range for the NCP308SN300T1G? The temperature range is from -40°C to +125°C.
- How can the threshold voltage be adjusted for the adjustable version? The threshold voltage can be adjusted using an external resistor divider network as shown in the datasheet.
