Overview
The NCP308SN330T1G is a supervisory circuit IC from onsemi, 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. This device is part of the NCP308 series, which is optimized for a wide range of applications including DSP, microcontroller, notebook, desktop computers, and portable/battery-powered products. The NCP308SN330T1G is particularly suited for monitoring a 3.3V voltage rail with high accuracy and reliability.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range (VDD) | −40°C < TJ < +125°C | 1.6 | 5.5 | V | |
| Minimum VDD Guaranteed RESET Output Valid | 0.5 | 0.8 | V | ||
| Supply Current (IDD) | VDD = 3.3V, RESET not asserted | 1.6 | 5.0 | μA | |
| Low-level output voltage of RESET (VOL) | 1.6V ≤ VDD ≤ 5.5V, IOL = 1.0 mA | 0.4 | V | ||
| Negative going SENSE threshold voltage accuracy (VIT%) | TJ = +25°C | −0.31 | −0.31 | % | |
| Hysteresis on VIT (VHYS) | 1.6V≤VDD≤4.2V | 1.0 | 3.0 | %VIT | |
| MR Internal pull-up resistance (RMR) | 90 kΩ | Ω | |||
| Input current at SENSE pin (ISENSE) | VSENSE = VIT | 10 nA | nA | ||
| RESET leakage Current (IOH) | VRESET = 5.5 V, RESET not asserted | 300 nA | nA | ||
| Reset delay time (tD) | CT = 100 pF | 1.25 ms | 10 s | s | |
| Temperature Range | −40°C | +125°C | °C |
Key Features
- Wide Supply Voltage Range: 1.6 V to 5.5 V
- Low Quiescent Current: 1.6 μA typical
- Fixed and Adjustable Threshold Voltage Versions: Supports various standard voltage rails including 0.9 V, 1.2 V, 1.25 V, 1.5 V, 1.8 V, 1.9 V, 2.5 V, 2.8 V, 3.0 V, 3.3 V, and 5.0 V
- Adjustable Version with Low Threshold Voltage: Minimum threshold voltage of 0.405 V
- High Threshold Voltage Accuracy: ±0.31% typical at 25°C
- Manual Reset Input (MR): Supports manual reset with an internal 90 kΩ pull-up resistor
- Open-Drain RESET Output: Active low open-drain output, can be configured as push-pull upon request
- Flexible Delay Time Programmability: Delay times from 1.25 ms to 10 s using the CT pin
- Small Packages: Available in TSOP-6 and WDFN6 2 x 2 mm, Pb-free packages
- AEC-Q100 Qualified and PPAP Capable: Suitable for automotive and other applications requiring unique site and control change requirements
Applications
- DSP or Microcontroller Applications: Ideal for monitoring and resetting DSPs and microcontrollers.
- Notebook/Desktop Computers: Used in power management and system monitoring.
- PDAs/Hand-Held Products: Suitable for battery-powered devices requiring low quiescent current.
- Portable/Battery-Powered Products: Ensures reliable operation in portable electronics.
- FPGA/ASIC Applications: Used in complex digital systems requiring precise voltage monitoring.
Q & A
- What is the supply voltage range of the NCP308SN330T1G?
The supply voltage range is from 1.6 V to 5.5 V.
- What is the typical quiescent current of the NCP308SN330T1G?
The typical quiescent current is 1.6 μA.
- What are the available threshold voltage options for the NCP308 series?
The NCP308 series offers fixed threshold voltage versions for standard voltage rails and an adjustable version with a minimum threshold voltage of 0.405 V.
- How accurate is the threshold voltage of the NCP308SN330T1G?
The threshold voltage accuracy is ±0.31% typical at 25°C.
- Does the NCP308SN330T1G support manual reset?
Yes, it supports manual reset with an internal 90 kΩ pull-up resistor on the MR pin.
- What is the range of reset delay times for the NCP308SN330T1G?
The reset delay time can be programmed from 1.25 ms to 10 s using the CT pin.
- In what packages is the NCP308SN330T1G available?
It is available in TSOP-6 and WDFN6 2 x 2 mm, Pb-free packages.
- Is the NCP308SN330T1G suitable for automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other applications requiring unique site and control change requirements.
- What is the temperature range of the NCP308SN330T1G?
The operating temperature range is from −40°C to +125°C.
- How does the NCP308SN330T1G handle short negative transients on the SENSE pin?
The device is relatively immune to short negative transients on the SENSE pin, with sensitivity dependent on threshold overdrive.
