Overview
The NCP308SNADJT1G 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 Accuracy (VIT%) | -1.75 | -0.31 | +1.75 | % |
| Hysteresis on VIT (VHYS) | 1.0 | 3.0 | 3.75 | %VIT |
| MR Internal Pull-up Resistance (RMR) | 90 | kΩ | ||
| Reset Delay Time (tD) | 1.25 ms | 10 s | ||
| Temperature Range | -40 | +125 | °C | |
| Package | TSOP-6 |
Key Features
- Wide supply voltage range from 1.6 V to 5.5 V
- Very low quiescent current of 1.6 μA
- Fixed and adjustable threshold voltage versions
- High threshold voltage accuracy of 0.31% typical
- Manual Reset (MR) input with internal 90 kΩ pull-up resistor
- Open-drain RESET output with optional push-pull configuration
- Flexible delay time programmability from 1.25 ms to 10 s
- 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 supply voltage range of the NCP308SNADJT1G? The supply voltage range is from 1.6 V to 5.5 V.
- What is the quiescent current of the NCP308SNADJT1G? The quiescent current is 1.6 μA.
- How accurate is the threshold voltage of the NCP308SNADJT1G? The threshold voltage accuracy is 0.31% typical.
- What is the purpose of the Manual Reset (MR) input? The MR input allows for manual assertion of the RESET signal by driving it low.
- How can the reset delay time be programmed? The reset delay time can be programmed using the CT pin with various configurations, including fixed times and user-defined times using a capacitor.
- What are the package options for the NCP308SNADJT1G? The device is available in TSOP-6 and WDFN6 2 x 2 mm, Pb-free packages.
- Is the NCP308SNADJT1G suitable for automotive applications? Yes, it is AEC-Q100 qualified and PPAP capable.
- What is the temperature range of the NCP308SNADJT1G? The temperature range is from -40°C to +125°C.
- How does the device handle transients on the SENSE pin? The device is relatively immune to short negative transients on the SENSE pin, with sensitivity dependent on threshold overdrive.
- Can the NCP308SNADJT1G monitor any voltage rail? Yes, the adjustable version can monitor any voltage rail down to 0.405 V using an external resistor divider network.
