Overview
The NCP308SN125T1G 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. This device is part of the NCP308 series, which is optimized for low quiescent current and programmable delay times. It supports a wide supply voltage range from 1.6 V to 5.5 V and features both fixed and externally adjustable threshold voltage versions.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VDD Supply Voltage Range | −40°C < TJ < +125°C | 1.6 | 5.5 | V | |
| VDD(min) Minimum VDD Guaranteed RESET Output Valid | 0.5 | 0.8 | V | ||
| IDD Supply Current (Current into VDD pin) | VDD = 3.3V, RESET not asserted MR, RESET, CT open | 1.6 | 5.0 | μA | |
| IDD Supply Current (Current into VDD pin) | VDD = 5.5V, RESET not asserted MR, RESET, CT open | 1.6 | 6.0 | μA | |
| VIT Negative going SENSE threshold voltage | 1.12 | 1.16 | V | ||
| VOL Low-level output voltage of RESET | 1.6V ≤ VDD ≤ 5.5V, IOL = 1.0 mA | 0.4 | V | ||
| tD Reset delay time | CT pin configuration dependent | 1.25 ms | 10 s | ||
| Temperature Range | −40°C | +125°C | °C |
Key Features
- Wide Supply Voltage Range: 1.6 V to 5.5 V
- Very Low Quiescent Current: 1.6 μA
- Fixed Threshold Voltage Versions for Standard Voltage Rails: 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, 5.0 V
- Adjustable Version with Low Threshold Voltage: 0.405 V (min)
- High Threshold Voltage Accuracy: 0.31% typ
- Support Manual Reset Input (MR)
- Open-Drain RESET Output (Push-pull Output upon Request)
- Flexible Delay Time Programmability: 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 applications requiring unique site and control change requirements
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 NCP308SN125T1G? The supply voltage range is from 1.6 V to 5.5 V.
- What is the quiescent current of the NCP308SN125T1G? The 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 starting from 0.405 V.
- How is the reset delay time programmed in the NCP308SN125T1G? The reset delay time can be programmed using the CT pin with different configurations, including fixed times and user-defined times using a capacitor.
- What is the temperature range of the NCP308SN125T1G? The temperature range is from −40°C to +125°C.
- Does the NCP308SN125T1G support manual reset? Yes, it supports manual reset input (MR).
- What type of output does the RESET pin have? The RESET output is an open-drain output, but it can be configured as a push-pull output upon request.
- Is the NCP308SN125T1G 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 are the package options for the NCP308SN125T1G? The device is available in TSOP-6 and WDFN6 2 x 2 mm, Pb-Free packages.
- How does the NCP308SN125T1G handle short negative transients on the SENSE pin? The NCP308 is relatively immune to short negative transients on the SENSE pin, with sensitivity dependent on threshold overdrive.
