Overview
The TPS3820-33DBVR is a low-power voltage supervisor chip produced by Texas Instruments. It is part of the TPS382x family of supervisors, designed to provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. This device ensures proper system reset by monitoring the supply voltage and asserting a reset signal when the voltage drops below a specified threshold. It features a compact 5-pin SOT-23 package, making it suitable for a wide range of applications, including embedded systems, automotive electronics, and industrial control systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBV), 5 pins |
| Operating Temperature Range | −40°C to 85°C |
| Supply Voltage Supervision Range | 2.5 V, 3 V, 3.3 V, 5 V |
| Threshold Voltage (typ) | 2.93 V, 4.55 V |
| Reset Threshold Accuracy (%) | 2.4% |
| Supply Current (typ) | 15 µA |
| Time Delay | 25 ms |
| Watchdog Timer | 0.2 s |
| Reset Output Type | Active-low, Push-Pull |
| Minimum Supply Voltage | 1.1 V |
| Maximum Supply Voltage | 5.5 V |
Key Features
- Power-on Reset Generator: Provides a reliable power-on reset signal with a fixed delay time of 25 ms.
- Manual Reset Input: Allows users to manually reset the device.
- Reset Output Options: Available in active-low, active-high, and open drain configurations.
- Supply Voltage Supervision: Monitors supply voltages within the range of 2.5 V to 5 V.
- Watchdog Timer: Prevents system hang-ups by resetting the device if it fails to reset itself after a certain time period.
- Low Supply Current: Typical supply current of 15 µA, making it suitable for battery-powered systems and portable devices.
- Compact Package: 5-pin SOT-23 package for easy integration into various applications.
Applications
- Embedded Systems: Ideal for ensuring proper system reset in embedded environments.
- Automotive Electronics: Designed to operate in the harsh conditions of automotive systems.
- Industrial Control Systems: Suitable for monitoring and supervising supply voltages in industrial settings.
- Aerospace and Defense Systems: Used in critical systems requiring reliable power-on reset signals and watchdog timers.
Q & A
- Q: What is the typical supply current of the TPS3820-33DBVR?
A: The typical supply current is 15 µA. - Q: What is the temperature range of the TPS3820-33DBVR?
A: The temperature range is −40°C to 85°C. - Q: What is the purpose of the watchdog timer in the TPS3820-33DBVR?
A: The watchdog timer helps prevent system hang-ups by resetting the device if it fails to reset itself after a certain time period. - Q: Can the TPS3820-33DBVR be used in automotive applications?
A: Yes, it is designed for use in automotive electronics and other harsh environments. - Q: What is the package type of the TPS3820-33DBVR?
A: The package type is SOT-23 (DBV) with 5 pins. - Q: What are the available reset output types for the TPS3820-33DBVR?
A: The reset output is available in active-low, active-high, and open drain configurations. - Q: What is the minimum supply voltage for the TPS3820-33DBVR?
A: The minimum supply voltage is 1.1 V. - Q: What is the fixed delay time for the power-on reset generator in the TPS3820-33DBVR?
A: The fixed delay time is 25 ms. - Q: Does the TPS3820-33DBVR have a manual reset input?
A: Yes, it has a manual reset input. - Q: What is the maximum supply voltage for the TPS3820-33DBVR?
A: The maximum supply voltage is 5.5 V.
