LTC2903IS6-B1#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: The LTC2903IS6-B1#TRPBF is a voltage supervisor and watchdog timer IC. It is designed to monitor the power supply voltage of electronic systems and provide reset signals when necessary.

Characteristics: - Voltage monitoring range: 0.4V to 5V - Adjustable reset threshold voltage - Watchdog timer with adjustable timeout period - Low quiescent current consumption - Small SOT-23 package for space-constrained applications

Package: SOT-23-6

Essence: The LTC2903IS6-B1#TRPBF is an essential component in ensuring reliable operation of electronic systems by monitoring the power supply voltage and providing reset signals when needed.

Packaging/Quantity: The LTC2903IS6-B1#TRPBF is typically sold in reels containing 3000 units.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage Range: 0.4V to VCC - 0.2V
• Watchdog Timeout Period Range: 6ms to 1024ms
• Quiescent Current: 10µA (typical)
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC2903IS6-B1#TRPBF has six pins arranged as follows:

```

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| | --| RESET |-- --| GND |-- --| WDI |-- --| VCC |-- --| MR |-- |___________| ```

Pin Descriptions: - RESET: Output pin for reset signal - GND: Ground reference - WDI: Watchdog input pin - VCC: Supply voltage input - MR: Manual reset input

Functional Features

1. Voltage Monitoring: The LTC2903IS6-B1#TRPBF continuously monitors the power supply voltage and asserts the RESET pin when the voltage falls below the programmed threshold.

2. Watchdog Timer: The integrated watchdog timer ensures that the system is functioning properly by requiring a periodic input signal on the WDI pin. If the input signal is not received within the specified timeout period, the RESET pin is asserted.

3. Adjustable Parameters: The reset threshold voltage and watchdog timeout period can be adjusted using external resistors and capacitors, allowing customization for different system requirements.

4. Low Power Consumption: With a quiescent current of only 10µA, the LTC2903IS6-B1#TRPBF minimizes power consumption, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows compatibility with various systems. - Adjustable parameters provide flexibility for different applications. - Small package size enables use in space-constrained designs. - Low power consumption prolongs battery life.

Disadvantages: - Limited number of pins may restrict functionality in complex systems. - Requires external components for parameter adjustment.

Working Principles

The LTC2903IS6-B1#TRPBF operates by comparing the monitored voltage with the programmed threshold voltage. When the monitored voltage falls below the threshold, the internal circuitry asserts the RESET pin, initiating a system reset. Additionally, the watchdog timer requires a periodic input signal on the WDI pin to prevent false resets. If the input signal is not received within the specified timeout period, the RESET pin is asserted.

Application Field Plans

The LTC2903IS6-B1#TRPBF finds application in various electronic systems where reliable power supply monitoring and reset functionality are crucial. Some potential application fields include:

1. Microcontrollers: Ensuring stable operation of microcontroller-based systems by monitoring the power supply voltage and providing reset signals when necessary.

2. Embedded Systems: Enhancing the reliability of embedded systems by detecting power supply failures and initiating system resets.

3. Industrial Control Systems: Monitoring power supply voltages in industrial control systems to prevent malfunctions and ensure continuous operation.

4. Automotive Electronics: Providing voltage supervision and reset capabilities in automotive electronic systems, improving overall system reliability.

Alternative Models

1. LTC2903IS6-B2#TRPBF: Similar to LTC2903IS6-B1#TRPBF but with different reset threshold voltage range.
2. LTC2903IS6-B3#TRPBF: Similar to LTC2903IS6-B1#TRPBF but with extended watchdog timeout period range.
3. LTC2903IS6-B4#TRPBF: Similar to LTC2903IS6-B1#TRPBF but with lower quiescent current consumption.

These alternative