NCP803SN232T1G

Product Overview

Category

NCP803SN232T1G belongs to the category of voltage supervisors.

Use

This product is primarily used for monitoring and controlling the voltage levels in electronic circuits.

Characteristics

• Voltage supervision range: 0.8V to 5.0V
• Low quiescent current: 1.5µA (typical)
• Wide operating temperature range: -40°C to +85°C
• Adjustable reset threshold voltage
• Open-drain output
• Small package size: SOT-23-3

Package and Quantity

The NCP803SN232T1G is available in a small SOT-23-3 package. It is typically sold in reels containing 3000 units.

Specifications

• Supply voltage range: 0.8V to 5.5V
• Reset threshold voltage options: 2.32V, 2.93V, 3.08V, 4.38V, and adjustable
• Reset timeout period options: 140ms, 560ms, 1120ms, and 2240ms
• Quiescent current: 1.5µA (typical)
• Output type: Open-drain
• Operating temperature range: -40°C to +85°C

Detailed Pin Configuration

The NCP803SN232T1G has three pins:

1. VDD: This pin is connected to the power supply voltage.
2. GND: This pin is connected to the ground reference.
3. RESET: This pin outputs the reset signal when the monitored voltage falls below the threshold.

Functional Features

• Voltage Monitoring: The NCP803SN232T1G continuously monitors the input voltage and generates a reset signal when it falls below the programmed threshold voltage.
• Adjustable Threshold: The reset threshold voltage can be adjusted using external resistors, allowing flexibility in the monitoring range.
• Open-Drain Output: The open-drain output allows easy integration with other circuitry and provides compatibility with different logic levels.

Advantages and Disadvantages

Advantages

• Wide operating voltage range enables compatibility with various power supply systems.
• Low quiescent current minimizes power consumption.
• Adjustable threshold voltage offers flexibility in voltage monitoring applications.
• Small package size allows for space-efficient designs.

Disadvantages

• Lack of built-in hysteresis may lead to potential instability in certain applications.
• Limited reset timeout period options may not suit all timing requirements.

Working Principles

The NCP803SN232T1G operates by comparing the input voltage with the programmed threshold voltage. When the input voltage falls below the threshold, the reset pin is pulled low, indicating a reset condition. Once the input voltage rises above the threshold, the reset pin returns to its high impedance state.

Detailed Application Field Plans

The NCP803SN232T1G finds applications in various fields, including:

1. Power Supply Monitoring: It ensures stable operation of microcontrollers, digital circuits, and other sensitive components by providing a reliable reset signal when the power supply voltage drops below the specified level.
2. Battery-Powered Devices: It helps prevent damage to battery-powered devices by initiating a reset when the battery voltage reaches critical levels.
3. Industrial Control Systems: It plays a crucial role in monitoring and controlling voltage levels in industrial control systems, ensuring safe and reliable operation.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the NCP803SN232T1G include:

1. MAX803: A series of voltage supervisors from Maxim Integrated.
2. MCP809: Voltage supervisory circuits from Microchip Technology.
3. TPS3808: Reset generators from Texas Instruments.

These alternative models provide comparable features and can be considered as substitutes for the NCP803SN232T1G in various applications.

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