The TPS3128E18DBVR from Texas Instruments is an active-low, open-drain, supply voltage supervisor with watchdog timer and manual reset in a SOT-23 (DBV) package with 5 pins. It is designed to monitor the power supply voltage of microprocessors and other processors to ensure that it remains within a safe operating range. The TPS3128E18DBVR also includes a watchdog timer to monitor the activity of the processor and reset it if it becomes unresponsive.

The TPS3128E18DBVR has a wide operating voltage range of 1.2V to 6V, making it suitable for a variety of applications. It also has a low power consumption of just 10µA, which makes it ideal for battery-powered devices.

Features

• Active-low, open-drain RESET output
• Programmable voltage threshold (1.71V to 2.65V)
• Watchdog timer with programmable timeout period (250ms to 8s)
• Manual reset input
• Low power consumption (10µA)
• Wide operating voltage range (1.2V to 6V)
• Available in a SOT-23 (DBV) package

Applications

• Microprocessor power supply monitoring
• System reset and watchdog timer
• Battery-powered devices
• Industrial automation and control systems
• Automotive electronics
• Consumer electronics

Description

The TPS3128E18DBVR monitors the power supply voltage of a microprocessor or other processor. If the voltage falls below the programmable threshold voltage, the TPS3128E18DBVR asserts the RESET output signal. This signal can be used to reset the processor or other device to prevent it from malfunctioning.

The TPS3128E18DBVR also includes a watchdog timer. The watchdog timer is a circuit that monitors the activity of the processor. If the watchdog timer does not receive a pulse from the processor within the programmable timeout period, the watchdog timer asserts the RESET output signal. This resets the processor and prevents it from becoming unresponsive.

The TPS3128E18DBVR also has a manual reset input. This input can be used to reset the processor or other device manually.

Benefits

The TPS3128E18DBVR provides a number of benefits, including:

• Increased system reliability: By monitoring the power supply voltage and processor activity, the TPS3128E18DBVR can help to prevent system failures.
• Reduced power consumption: The TPS3128E18DBVR has a low power consumption, which makes it ideal for battery-powered devices.
• Increased design flexibility: The TPS3128E18DBVR has a wide operating voltage range and a variety of programmable features, which makes it suitable for a variety of applications.

Conclusion

The TPS3128E18DBVR is a versatile and reliable voltage supervisor with watchdog timer and manual reset. It is suitable for a wide range of applications, including microprocessor power supply monitoring, system reset and watchdog timer, battery-powered devices, industrial automation and control systems, automotive electronics, and consumer electronics.