TPS3813K33DBVR

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low Power Supervisor with Programmable Delay - Precision Voltage Monitor - Watchdog Timer - Manual Reset Input - Active-Low Push-Pull RESET Output - Power-On Reset Generator with Fixed Delay Time of 200 ms (TPS3813) - Supply Voltage Range: 1.6 V to 6.5 V - Operating Temperature Range: -40°C to +125°C - Package Type: SOT-23 (DBV) - Essence: Provides voltage monitoring and reset generation functions for microcontrollers and other digital systems.

Packaging/Quantity: Tape & Reel (3000 pieces per reel)

Specifications

• Supply Voltage Range: 1.6 V to 6.5 V
• Threshold Voltage Accuracy: ±1%
• Manual Reset Input Threshold Voltage: 0.2 VCC
• Watchdog Timeout Period: 1.6 s, 3.2 s, 6.4 s, or 12.8 s
• Quiescent Current: 10 µA (typical)
• Power-On Reset Delay Time: 200 ms (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The TPS3813K33DBVR has the following pin configuration:

```

---

| | --| VDD | --| GND | --| MR | --| RESET | |___________| ```

Functional Features

1. Voltage Monitoring: The TPS3813K33DBVR continuously monitors the supply voltage and asserts a reset signal when the voltage falls below a programmable threshold.
2. Watchdog Timer: It includes a watchdog timer that can be used to monitor the activity of the microcontroller. If the microcontroller fails to toggle the watchdog input within the specified timeout period, a reset signal is generated.
3. Manual Reset Input: The manual reset input allows an external signal to assert a reset condition.
4. Active-Low Push-Pull RESET Output: The active-low push-pull RESET output provides a reset signal to the microcontroller or other digital system.
5. Power-On Reset Generator: The TPS3813K33DBVR generates a fixed delay time of 200 ms for power-on reset.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide supply voltage range - Accurate voltage monitoring - Programmable watchdog timeout period - Small package size

Disadvantages: - Limited number of available timeout periods for the watchdog timer - Fixed delay time for power-on reset

Working Principles

The TPS3813K33DBVR operates by continuously monitoring the supply voltage using an internal voltage reference. When the supply voltage falls below the programmable threshold, the device asserts a reset signal. The watchdog timer monitors the activity of the microcontroller by expecting a periodic signal. If the microcontroller fails to provide this signal within the specified timeout period, the TPS3813K33DBVR generates a reset signal. The manual reset input allows an external signal to assert a reset condition. The active-low push-pull RESET output provides a reset signal to the microcontroller or other digital system. The power-on reset generator ensures a fixed delay time of 200 ms before releasing the reset signal during power-up.

Detailed Application Field Plans

The TPS3813K33DBVR is commonly used in various applications, including: 1. Microcontrollers and digital systems requiring voltage monitoring and reset generation. 2. Battery-powered devices where low power consumption is crucial. 3. Industrial control systems to ensure reliable operation and system integrity. 4. Automotive electronics for monitoring critical voltage levels and providing reset functionality. 5. Home automation systems to monitor and control various devices.

Detailed and Complete Alternative Models

1. TPS3813K33DBVT: Similar to TPS3813K33DBVR, but in a SOT-23 (DBT) package.
2. TPS3813I50DBVR: Voltage supervisor with a different threshold voltage and package type (SOT-23).
3. TPS3808G01DBVR: Supervisor with adjustable delay time and a different package type (SOT-23).

These alternative models offer similar functionality but may have variations in threshold voltage, delay time, or package type to suit specific application requirements.

Word count: 536 words