TLV803MDBZR

Product Overview

• Category: Integrated Circuit
• Use: Voltage Supervisor
• Characteristics: Low Power, Reset Output, Adjustable Threshold, Manual Reset Input
• Package: SOT-23-5
• Essence: Monolithic Voltage Supervisor with Watchdog Timer
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Reset Threshold Voltage Options: 1.8V, 2.5V, 3V, 3.3V, 5V
• Watchdog Timeout Period: 1.6s, 6.4s, 25.6s, 102.4s (typical)
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The TLV803MDBZR has a total of 5 pins:

1. GND: Ground connection.
2. MR: Manual Reset input pin. Pulling this pin low forces a reset.
3. VDD: Positive supply voltage input.
4. RESET: Reset output pin. Goes low when the monitored voltage drops below the threshold.
5. WDI: Watchdog Timer input pin. A falling edge on this pin resets the watchdog timer.

Functional Features

• Monitors the supply voltage and asserts a reset signal when it falls below the set threshold.
• Provides a manual reset input for immediate system reset.
• Includes a watchdog timer that can be used to monitor system activity.
• Adjustable reset threshold voltage to accommodate different voltage levels.
• Low power consumption for energy-efficient applications.

Advantages and Disadvantages

Advantages

• Small package size allows for space-saving designs.
• Wide operating voltage range enables compatibility with various systems.
• Adjustable reset threshold voltage provides flexibility in different applications.
• Low power consumption prolongs battery life in portable devices.

Disadvantages

• Limited number of available reset threshold voltage options.
• Lack of built-in hysteresis may lead to potential noise-related issues.

Working Principles

The TLV803MDBZR is a voltage supervisor integrated circuit that continuously monitors the supply voltage. When the voltage drops below the set threshold, the RESET pin is asserted low, indicating a system reset. The manual reset input (MR) allows for an immediate reset regardless of the monitored voltage level. Additionally, the device includes a watchdog timer that requires a periodic signal on the WDI pin to prevent a system reset. If the watchdog timer is not refreshed within the specified timeout period, a reset signal is generated.

Detailed Application Field Plans

The TLV803MDBZR can be used in various applications where reliable voltage monitoring and system reset functionality are required. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing erratic behavior during power-up or brownout conditions.
2. Industrial Control Systems: Monitoring critical voltage levels to maintain stable operation and prevent damage to sensitive equipment.
3. Automotive Electronics: Providing voltage supervision to ensure safe and reliable operation of automotive systems.
4. Battery-Powered Devices: Protecting against undervoltage conditions and optimizing battery usage.
5. Home Automation Systems: Enabling reliable operation and quick recovery from power disturbances.

Detailed and Complete Alternative Models

Some alternative models to the TLV803MDBZR that offer similar functionality and features include:

1. MAX803: Voltage Supervisors with Adjustable Reset Threshold and Watchdog Timer.
2. ADM803: Microprocessor Supervisory Circuits with Manual Reset Input.
3. TPS3808: Ultra-Low Power Voltage Supervisors with Programmable Delay Time.
4. MCP130: Voltage Supervisors with Manual Reset and Watchdog Timer.
5. LTC2937: Adjustable Voltage Supervisors with Precision Reset Threshold.

These alternative models provide options for different voltage ranges, package types, and additional features to suit specific application requirements.

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