Overview
The NCP803SN293T1G is a microprocessor reset supervisory circuit produced by onsemi. This device is designed to monitor the power supply in digital systems and provide a reset signal to the host processor when necessary. It is part of the NCP803 series, which is known for its low supply current and precision voltage monitoring capabilities. The NCP803SN293T1G is particularly suited for applications requiring reliable power supply monitoring and reset functionality without the need for external components.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Range | 1.0 | - | 5.5 | V |
| Supply Current (VCC = 3.3 V) | - | 0.5 | 1.2 | μA |
| Reset Voltage Threshold (VTH) | - | 2.93 | - | V |
| Reset Active TimeOut Period | 100 | - | 330 | ms |
| RESET Output Voltage Low (VCC = VTH - 0.2 V, ISINK = 0.5 mA) | - | 0.3 | - | V |
| Operating Temperature | -40 | - | 105 | °C |
| Package Type | - | - | SOT-23-3 | - |
Key Features
- Precision VCC monitoring for supplies from 1.5 V to 5.0 V, with options available in 100 mV steps from 1.2 V to 4.9 V.
- Low supply current of 0.5 μA (VCC = 3.2 V), making it suitable for battery-powered applications.
- No external components required.
- Open-drain active-low RESET output.
- VCC transient immunity to reject fast transient glitches on the power supply line.
- Four guaranteed minimum power-on reset pulse widths available (1 ms, 20 ms, 100 ms, and 140 ms).
- RESET output guaranteed to VCC = 1.0 V.
- Wide operating temperature range: -40°C to 105°C.
- Pb-free and RoHS compliant.
Applications
- Computers and embedded systems.
- Battery-powered equipment.
- Critical microprocessor power supply monitoring.
The NCP803SN293T1G is particularly useful in systems where reliable power supply monitoring and reset functionality are crucial, such as in embedded systems, battery-powered devices, and critical microprocessor applications.
Q & A
- What is the primary function of the NCP803SN293T1G?
The primary function of the NCP803SN293T1G is to monitor the power supply in digital systems and provide a reset signal to the host processor when necessary.
- What is the typical supply current of the NCP803SN293T1G at VCC = 3.3 V?
The typical supply current is 0.5 μA at VCC = 3.3 V.
- What are the available reset timeout periods for the NCP803SN293T1G?
The available reset timeout periods are 100 ms to 330 ms.
- What is the operating temperature range of the NCP803SN293T1G?
The operating temperature range is -40°C to 105°C.
- Is the NCP803SN293T1G Pb-free and RoHS compliant?
- What package type is the NCP803SN293T1G available in?
The NCP803SN293T1G is available in the SOT-23-3 package.
- Does the NCP803SN293T1G require external components for operation?
No, the NCP803SN293T1G does not require external components for operation.
- How does the NCP803SN293T1G handle transient glitches on the power supply line?
The NCP803SN293T1G has built-in VCC transient immunity to reject fast transient glitches on the power supply line.
- What is the reset voltage threshold for the NCP803SN293T1G?
The reset voltage threshold (VTH) for the NCP803SN293T1G is 2.93 V.
- Is the RESET output of the NCP803SN293T1G valid to VCC = 0 V?
The RESET output is valid to VCC = 1.0 V. Below this voltage, the output becomes an open circuit and does not sink current.
