TPS3809K33DBVRG4

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 - Small Package Size

Package: SOT-23 (DBV)

Essence: The TPS3809K33DBVRG4 is a voltage supervisor IC that provides various monitoring and reset functions for microcontrollers, DSPs, or other digital systems.

Packaging/Quantity: The TPS3809K33DBVRG4 is available in tape and reel packaging, with 3000 units per reel.

Specifications

The TPS3809K33DBVRG4 has the following specifications:

• Threshold Voltage: 3.08V
• Delay Time: Programmable from 1.25ms to 10s
• Supply Current: 7µA (typical)
• Watchdog Timeout Period: 1.6s (typical)
• Manual Reset Input Threshold Voltage: 0.8V (typical)
• Power-On Reset Delay Time: 20ms (typical)
• Power-On Reset Threshold Voltage: 2.93V (typical)

Pin Configuration

The TPS3809K33DBVRG4 has the following pin configuration:

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

Functional Features

The TPS3809K33DBVRG4 offers the following functional features:

1. Voltage Monitoring: Monitors the supply voltage and provides a reset signal when it falls below the threshold voltage.
2. Programmable Delay Time: Allows the user to set the delay time for the reset signal after the supply voltage drops below the threshold.
3. Manual Reset Input: Provides an external manual reset input that can be used to force a reset.
4. Watchdog Timer: Monitors the activity of the microcontroller or digital system and generates a reset if no activity is detected within the watchdog timeout period.
5. Power-On Reset Generator: Generates a reset signal during power-up until the supply voltage reaches the power-on reset threshold.

Advantages and Disadvantages

Advantages: - Low power consumption - Small package size - Programmable delay time - Manual reset input - Wide supply voltage range

Disadvantages: - Limited number of pins for additional functionalities - Not suitable for high-voltage applications

Working Principles

The TPS3809K33DBVRG4 operates by continuously monitoring the supply voltage. When the voltage falls below the threshold, it triggers a reset signal. The delay time for the reset signal can be programmed according to the application requirements. Additionally, the IC includes a watchdog timer that monitors the activity of the microcontroller or digital system. If no activity is detected within the watchdog timeout period, a reset signal is generated.

Detailed Application Field Plans

The TPS3809K33DBVRG4 is commonly used in various applications, including:

1. Microcontrollers: Provides reliable power-on reset and voltage monitoring for microcontrollers in embedded systems.
2. Digital Signal Processors (DSPs): Ensures proper reset and voltage monitoring for DSPs in communication systems and audio/video processing devices.
3. Industrial Control Systems: Offers supervision and reset functions for industrial control systems, ensuring stable operation and protection against voltage fluctuations.
4. Automotive Electronics: Provides voltage monitoring and reset capabilities for automotive electronic systems, enhancing safety and reliability.

Detailed and Complete Alternative Models

1. TPS3809I33DBVRG4: Similar to TPS3809K33DBVRG4 but with a different threshold voltage (3.3V).
2. TPS3809J33DBVRG4: Similar to TPS3809K33DBVRG4 but with a different package (SOT-23-5).

These alternative models offer similar functionality and can be used as substitutes for the TPS3809K33DBVRG4 in specific applications.

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