Overview
The NCP308MT180TBG is a part of the NCP308 series of supervisory circuit ICs produced by onsemi. This device is 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. The NCP308MT180TBG is optimized for monitoring a nominal voltage of 1.8 V, making it suitable for a wide range of applications including DSP, microcontroller, notebook/desktop computers, PDAs, hand-held products, and portable/battery-powered devices.
Key Specifications
| Symbol | 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 | |
| VIT | Negative going SENSE threshold voltage | 1.67 | V | |||
| VIT% | SENSE threshold voltage accuracy | TJ = +25°C | −0.31 | ±0.31 | +0.31 | % |
| VHYS | Hysteresis on VIT | 1.6V≤VDD≤4.2V | 1.0 | 3.0 | %VIT | |
| tD | Reset delay time | CT = Open | 20 | ms | ||
| tD | Reset delay time | CT = VDD | 300 | ms | ||
| tD | Reset delay time (programmable) | CT = Capacitor | 1.25 | 10 | s | |
| TJ | Operating Temperature Range | −40 | +125 | °C |
Key Features
- Wide Supply Voltage Range: 1.6 V to 5.5 V
- Low Quiescent Current: 1.6 μA
- Fixed and Adjustable Threshold Voltages: Including a nominal monitored voltage of 1.8 V for the NCP308MT180TBG
- High Threshold Voltage Accuracy: 0.31% typical
- Manual Reset Input (MR): Allows for manual reset of the system
- Open-Drain RESET Output: Can be configured as push-pull output upon request
- Flexible Delay Time Programmability: 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 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 NCP308MT180TBG?
The primary function is to monitor system voltages and assert a RESET signal when the voltage drops below the specified threshold or when the Manual Reset input is driven low.
- What is the supply voltage range for the NCP308MT180TBG?
The supply voltage range is from 1.6 V to 5.5 V.
- What is the quiescent current of the NCP308MT180TBG?
The quiescent current is 1.6 μA.
- What is the threshold voltage for the NCP308MT180TBG?
The threshold voltage is 1.8 V.
- How can the reset delay time be programmed?
The reset delay time can be programmed using the CT pin with different configurations: fixed times by connecting CT to VDD or leaving it open, or a user-defined time using a capacitor.
- What are the available package types for the NCP308MT180TBG?
The device is available in TSOP-6 and WDFN6 2 x 2 mm, Pb-Free packages.
- Is the NCP308MT180TBG suitable for automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other critical applications.
- What is the operating temperature range for the NCP308MT180TBG?
The operating temperature range is from −40°C to +125°C.
- How does the Manual Reset (MR) input work?
The Manual Reset input allows for manual reset of the system by driving the MR pin low.
- What is the significance of the CT pin in the NCP308MT180TBG?
The CT pin is used to program the reset delay time, either by connecting it to VDD, leaving it open, or using a capacitor.
