TPS3801K33DCKRG4

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low Power Supervisor with Programmable Delay Time - Precision Voltage Monitor - Manual Reset Input - Watchdog Timer - Power-On Reset Generator - Supply Voltage Range: 1.6V to 6.5V - Operating Temperature Range: -40°C to +85°C - Package Type: SC-70 (SOT-323) - RoHS Compliant

Package/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

The TPS3801K33DCKRG4 is an integrated circuit voltage supervisor designed for monitoring the power supply voltage in microcontroller-based systems. It provides a reset signal to the microcontroller during power-up, power-down, and brownout conditions. The device also includes a watchdog timer that can be used to monitor the system's operation.

The TPS3801K33DCKRG4 operates over a supply voltage range of 1.6V to 6.5V and has a programmable delay time for the reset signal. It features a precision voltage monitor with an accuracy of ±1.5% and a manual reset input for external reset control. The device is housed in a small SC-70 (SOT-323) package, making it suitable for space-constrained applications.

Pin Configuration

The TPS3801K33DCKRG4 has the following pin configuration:

1. GND (Ground)
2. MR (Manual Reset)
3. VDD (Supply Voltage)
4. RESET (Reset Output)

Functional Features

• Power-On Reset Generation: The TPS3801K33DCKRG4 generates a reset signal when the supply voltage rises above the threshold voltage.
• Programmable Delay Time: The delay time for the reset signal can be programmed using an external capacitor.
• Precision Voltage Monitoring: The device monitors the supply voltage and provides a reset signal when it falls below the threshold voltage.
• Manual Reset Input: An external manual reset input allows for immediate system reset.
• Watchdog Timer: The TPS3801K33DCKRG4 includes a watchdog timer that can be used to monitor the system's operation. If the microcontroller fails to toggle a specific I/O pin within a specified time, the watchdog timer will trigger a system reset.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide operating voltage range - Small package size - Programmable delay time for reset signal - Precision voltage monitoring

Disadvantages: - Limited number of available alternative models - May require additional external components for certain applications

Working Principles

The TPS3801K33DCKRG4 operates by continuously monitoring the supply voltage and comparing it to a fixed threshold voltage. When the supply voltage rises above the threshold voltage, the device generates a reset signal. Conversely, if the supply voltage falls below the threshold voltage, the device also generates a reset signal. The delay time for the reset signal can be adjusted using an external capacitor.

Additionally, the TPS3801K33DCKRG4 includes a watchdog timer that monitors the system's operation. If the microcontroller fails to toggle a specific I/O pin within a specified time, the watchdog timer triggers a system reset.

Application Field Plans

The TPS3801K33DCKRG4 is commonly used in various microcontroller-based systems where reliable power supply monitoring is crucial. Some application fields include:

1. Industrial Control Systems: The device ensures stable operation of microcontrollers in industrial control systems, preventing data corruption or system failures due to power supply issues.
2. Automotive Electronics: The TPS3801K33DCKRG4 is used in automotive applications to monitor the power supply voltage and provide a reset signal during abnormal conditions, ensuring safe and reliable operation of electronic systems.
3. Consumer Electronics: It is employed in consumer electronics devices such as smart home systems, IoT devices, and portable electronics to ensure proper functioning and prevent data loss or system crashes.

Alternative Models

While the TPS3801K33DCKRG4 is a popular choice for voltage supervision, there are alternative models available from different manufacturers. Some notable alternatives include:

• MAX809: Manufactured by Maxim Integrated, the MAX809 series offers similar voltage monitoring and reset functions with various threshold voltage options.
• ADM6315: Produced by Analog Devices, the ADM6315 series provides voltage monitoring and reset capabilities with adjustable delay time and multiple package options.
• MCP1316: Microchip's MCP1316 series features low-power voltage supervisors with programmable delay time and a wide operating voltage range.

These alternative models offer similar functionalities and can be considered based on specific application requirements.

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