TPS3421ECDRYR

The TPS3421ECDRYR is a voltage supervisor integrated circuit (IC) manufactured by Texas Instruments. It is designed to monitor power supply voltages and provide reset signals to microcontrollers and other digital devices, ensuring reliable operation during power-up, power-down, and brownout conditions.

Key Features:

1. Voltage Monitoring: The TPS3421 monitors supply voltages and can detect when the voltage falls below a predetermined threshold. This is crucial for preventing erratic behavior in digital circuits during power fluctuations.

2. Reset Output: The IC provides a reset output signal that is asserted when the monitored voltage is below the threshold. This output can be used to reset microcontrollers or other digital logic devices, ensuring they start in a known state.

3. Adjustable Thresholds: The TPS3421 allows for adjustable voltage thresholds, enabling designers to set the reset point according to the specific requirements of their application.

4. Low Power Consumption: The device is designed to operate with low power consumption, making it suitable for battery-powered applications.

5. Temperature Range: The TPS3421 is rated for operation over a wide temperature range, typically from -40°C to +125°C, making it suitable for industrial and automotive applications.

6. Small Package Size: The IC is available in a compact DRY package, which is a 5-pin SOT-23 package. This small form factor is ideal for space-constrained designs.

7. Fast Response Time: The reset output responds quickly to voltage changes, ensuring that the connected devices are reset promptly during power fluctuations.

8. Hysteresis: The TPS3421 includes built-in hysteresis, which helps to prevent false triggering of the reset output due to noise or minor voltage fluctuations.

Applications:

• Microcontroller reset circuits
• Power supply monitoring
• Automotive electronics
• Industrial control systems
• Battery-powered devices

Electrical Characteristics:

• Supply Voltage Range: Typically operates from 1.5V to 5.5V.
• Reset Threshold Voltage: Configurable, with options available for different applications.
• Output Type: Open-drain output, requiring a pull-up resistor for proper operation.

Conclusion:

The TPS3421ECDRYR from Texas Instruments is a versatile and reliable voltage supervisor that enhances the stability and reliability of electronic systems by ensuring that microcontrollers and other digital devices are reset appropriately during power supply variations. Its compact size, low power consumption, and adjustable features make it an excellent choice for a wide range of applications.