Overview
The NCP803SN308T1G is a microprocessor reset supervisory circuit produced by onsemi. This device is part of the NCP803 series, designed to monitor the power supply in digital systems and provide a reset signal to the host processor when necessary. It is optimized for low supply current, making it suitable for battery-powered applications. The NCP803SN308T1G is available in a compact SC-70 (SOT-323) package and is Pb-free and RoHS compliant.
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 |
| Voltage Detector Threshold (VTH) | 3.08 | - | - | V |
| Reset Active TimeOut Period | 20 | - | 66 | ms |
| Operating Temperature | -40 | - | 105 | °C |
| RESET Output Voltage Low (VCC = VTH - 0.2 V, ISINK = 0.5 mA) | - | 0.3 | - | V |
| RESET Leakage Current (VCC > VTH, RESET De-asserted) | - | - | 1 | μA |
Key Features
- Precision VCC Monitor for 1.5 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V Supplies
- Precision Monitoring Voltages from 1.2 V to 4.9 V Available in 100 mV Steps
- Four Guaranteed Minimum Power-On Reset Pulse Width Available (1 ms, 20 ms, 100 ms, and 140 ms)
- RESET Output Guaranteed to VCC = 1.0 V
- Low Supply Current of 0.5 μA (VCC = 3.2 V)
- VCC Transient Immunity to Reject Fast Transient Glitches
- No External Components Required
- Wide Operating Temperature: -40°C to 105°C
- Pb-free and RoHS Compliant
Applications
- Computers
- Embedded Systems
- Battery Powered Equipment
- Critical Microprocessor Power Supply Monitoring
The NCP803SN308T1G is particularly useful in systems where reliable power supply monitoring and reset functionality are crucial, especially in battery-powered devices where low power consumption is a key requirement.
Q & A
- What is the primary function of the NCP803SN308T1G?
The primary function of the NCP803SN308T1G is to monitor the power supply in digital systems and provide a reset signal to the host processor when the supply voltage falls below a specified threshold.
- What is the typical supply current of the NCP803SN308T1G at 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 NCP803SN308T1G?
The available reset timeout periods are 1 ms, 20 ms, 100 ms, and 140 ms.
- Is the NCP803SN308T1G Pb-free and RoHS compliant?
- What is the operating temperature range of the NCP803SN308T1G?
The operating temperature range is -40°C to 105°C.
- Does the NCP803SN308T1G require any external components?
No, the NCP803SN308T1G does not require any external components.
- How does the NCP803SN308T1G handle VCC transients?
The NCP803SN308T1G has built-in VCC transient immunity to reject fast transient glitches on the power supply line.
- What is the voltage detector threshold (VTH) for the NCP803SN308T1G?
The voltage detector threshold (VTH) for the NCP803SN308T1G is 3.08 V.
- What package types are available for the NCP803SN308T1G?
The NCP803SN308T1G is available in SC-70 (SOT-323) packages.
- Is the RESET output 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.
