Overview
The NCP803SN438T1G is a system supervisor circuit designed by onsemi, optimized for monitoring the power supply voltage (VCC) in digital systems and providing a reset signal to the host processor when necessary. This device is part of the NCP803 series, known for its low supply current and high precision in voltage monitoring. It is particularly suitable for applications requiring reliable power supply monitoring and reset functionality, especially in battery-powered devices and critical microprocessor systems.
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) | - | 4.38 | - | V |
| Reset Active TimeOut Period | - | 140-460 | - | ms |
| Operating Junction Temperature Range | -40 | - | 105 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
| Lead Temperature (Soldering, 10 Seconds) | - | - | 260 | °C |
| ESD Protection (Human Body Model) | - | - | 2000 | V |
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 VCC line.
- Guaranteed minimum power-on reset pulse widths of 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.
Q & A
- What is the primary function of the NCP803SN438T1G?
The primary function is to monitor the power supply voltage (VCC) and provide a reset signal to the host processor when necessary.
- What is the typical supply current of the NCP803SN438T1G?
The typical supply current is 0.5 μA at VCC = 3.2 V.
- What are the available reset timeout periods for the NCP803SN438T1G?
The available reset timeout periods are 1 ms, 20 ms, 100 ms, and 140 ms.
- What is the operating temperature range of the NCP803SN438T1G?
The operating temperature range is -40°C to 105°C.
- Is the NCP803SN438T1G Pb-free and RoHS compliant?
- What type of output does the NCP803SN438T1G have?
The device has an open-drain active-low RESET output.
- Does the NCP803SN438T1G require any external components?
No, the device does not require any external components.
- How does the NCP803SN438T1G handle VCC transients?
The device has built-in VCC transient immunity to reject fast transient glitches on the VCC line.
- What is the storage temperature range for the NCP803SN438T1G?
The storage temperature range is -65°C to 150°C.
- What is the lead temperature for soldering the NCP803SN438T1G?
The lead temperature for soldering is up to 260°C for 10 seconds.
