TPS3801J25DCKRG4

Product Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low Power Supervisor with Programmable Delay Time - Precision Voltage Monitor for 2.5V Systems - Manual Reset Input (MR) - Active-Low Push-Pull RESET Output (RESET) - Open-Drain RESET Output Option (TPS3801J25DCKR) - Watchdog Timer (WDI) - Supply Voltage Range: 1.6V to 6.5V - Operating Temperature Range: -40°C to +85°C - Package Type: SC-70 (DCK) - Package Quantity: 3000 pieces per reel

Specifications

The TPS3801J25DCKRG4 is a low-power voltage supervisor designed for monitoring the power supply voltage in microcontroller-based systems. It provides a reset signal whenever the supply voltage drops below a preset threshold or when the manual reset input is asserted.

Key specifications include: - Threshold Voltage: 2.5V - Reset Timeout Period: Programmable - Supply Current: 3 µA (typical) - Watchdog Timeout Period: 1.6s (typical) - Power-On Reset Delay: 20 ms (typical)

Pin Configuration

The TPS3801J25DCKRG4 features a 5-pin SC-70 package with the following pin configuration:

____ MR | | VDD GND | | RESET WDI | | ______|____|

Functional Features

1. Voltage Monitoring: The TPS3801J25DCKRG4 continuously monitors the supply voltage and asserts the reset signal if it falls below the preset threshold.
2. Programmable Delay Time: The reset timeout period can be adjusted using external components, allowing flexibility in system design.
3. Manual Reset Input (MR): The manual reset input allows the system to be reset externally, overriding the voltage monitoring function.
4. Reset Output Options: The device provides an active-low push-pull RESET output. An open-drain RESET output option is available in the TPS3801J25DCKR variant.
5. Watchdog Timer (WDI): The integrated watchdog timer ensures that the microcontroller remains operational by periodically resetting it if the WDI pin is not toggled within the specified timeout period.

Advantages and Disadvantages

Advantages: - Low power consumption - Programmable delay time for reset signal - Manual reset capability - Wide supply voltage range - Compact SC-70 package

Disadvantages: - Limited number of pins for additional functionality - Not suitable for applications requiring higher threshold voltages

Working Principles

The TPS3801J25DCKRG4 operates by comparing the supply voltage with a preset threshold voltage (2.5V). If the supply voltage drops below this threshold or the manual reset input is asserted, the device asserts the reset signal. The reset signal remains active until the supply voltage rises above the threshold and the reset timeout period elapses.

The integrated watchdog timer monitors the WDI pin, ensuring that the microcontroller remains responsive. If the WDI pin is not toggled within the specified timeout period, the watchdog timer asserts the reset signal, resetting the microcontroller.

Application Field Plans

The TPS3801J25DCKRG4 is commonly used in various applications where reliable voltage monitoring and system reset functionality are required. Some potential application fields include: - Microcontroller-based systems - Embedded systems - Battery-powered devices - Industrial automation - Automotive electronics

Alternative Models

1. TPS3801K33DCKRG4: Voltage supervisor with a threshold voltage of 3.3V.
2. TPS3808G01DBVR: Ultra-low power voltage supervisor with a threshold voltage of 2.93V.
3. TPS3839K33DBVR: Adjustable voltage supervisor with a threshold voltage range of 2.5V to 5V.

These alternative models offer similar functionality but may have different threshold voltages or package options, providing flexibility for various system requirements.

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