TPS3802K33DCKRG4

Overview

Product 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 (5-Lead) - RoHS Compliant

Package and Quantity: SC-70 (5-Lead), Tape and Reel, 3000 units per reel

Specifications

The TPS3802K33DCKRG4 is a low-power voltage supervisor IC designed for monitoring the power supply voltage of microcontrollers, DSPs, or other digital systems. It provides accurate reset generation, watchdog timer, and manual reset input.

Key specifications include: - Supply Voltage Range: 1.6V to 6.5V - Threshold Voltage Options: 2.93V, 3.08V, 3.3V, 3.63V - Adjustable Reset Timeout Period: 1.25ms to 10s - Watchdog Timer Timeout Period: 1.6s, 3.1s, 6.3s, 12.5s - Quiescent Current: 1.8µA (typical) - Power-On Reset Delay Time: 20ms (typical)

Pin Configuration

The TPS3802K33DCKRG4 has a 5-lead SC-70 package with the following pin configuration:

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

Functional Features

1. Voltage Monitoring: The TPS3802K33DCKRG4 continuously monitors the supply voltage and asserts the reset output when the voltage falls below the threshold.
2. Programmable Delay Time: The reset timeout period can be adjusted using an external capacitor to meet specific system requirements.
3. Manual Reset Input: The MR pin allows for manual assertion of the reset signal, overriding the voltage monitoring function.
4. Watchdog Timer: The integrated watchdog timer provides a system reset if the WDI input is not toggled within the specified timeout period.
5. Power-On Reset Generator: The device generates a reset pulse upon power-up to ensure proper system initialization.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide supply voltage range - Programmable delay time for flexibility - Manual reset option for system control - Integrated watchdog timer for enhanced reliability - Power-on reset ensures proper system startup

Disadvantages: - Limited number of threshold voltage options - SC-70 package may require additional handling precautions

Working Principles

The TPS3802K33DCKRG4 operates by comparing the supply voltage with a programmable threshold voltage. When the supply voltage drops below the threshold, the reset output is asserted, indicating a power failure or low voltage condition. The reset timeout period can be adjusted using an external capacitor connected to the CT pin.

The device also includes a watchdog timer that monitors the WDI input. If the WDI signal is not toggled within the specified timeout period, a system reset is triggered. This feature helps prevent system lock-ups or malfunctions.

Upon power-up, the TPS3802K33DCKRG4 generates a power-on reset pulse to ensure proper initialization of the system.

Application Field Plans

The TPS3802K33DCKRG4 is commonly used in various applications where voltage monitoring and system reset functionality are required. Some potential application fields include: - Microcontrollers - Digital Signal Processors (DSPs) - Industrial Control Systems - Automotive Electronics - Battery-Powered Devices - Home Automation Systems

Alternative Models

1. TPS3803G15DBVR - 1.5V Threshold Voltage, SOT-23 Package
2. TPS3808G01DBVR - Adjustable Threshold Voltage, SOT-23 Package
3. TPS3836H30DBVR - 3.0V Threshold Voltage, SOT-23 Package
4. TPS3840PWP - Programmable Delay Time, HTSSOP Package
5. TPS3850H50DBVR - 5.0V Threshold Voltage, SOT-23 Package

These alternative models offer similar voltage supervisor functionality with variations in threshold voltage options, package types, and additional features.

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