Overview
The TPS3824-50DBVTG4 is a voltage monitor with a watchdog timer from Texas Instruments, part of the TPS382x family. This device is designed to provide circuit initialization and timing supervision, primarily for DSP and processor-based systems. It monitors the supply voltage and generates a reset signal if the voltage drops below a predefined threshold. The TPS3824-50DBVTG4 features both active-low and active-high reset outputs, a manual reset input, and a watchdog timer to ensure proper system operation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.5 V, 3 V, 3.3 V, 5 V | V |
| Reset Output Type | Active-low, Active-high | - |
| Watchdog Time Out | 200 ms to 1.6 s | s/ms |
| Delay Time | 15 ms to 300 ms | ms |
| Supply Current | 15 μA (typical) | μA |
| Operating Temperature Range | −40°C to 85°C (−40°C to 125°C for TPS3823A-33) | °C |
| Package Type | 5-pin SOT-23 | - |
| Input Threshold Voltage (VIT−) | 2.21 V to 4.64 V (depending on the model) | V |
Key Features
- Power-on reset generator with fixed delay times (200 ms or 25 ms)
- Manual reset input (MR) to force a reset signal
- Reset output available in active-low, active-high, and open-drain configurations
- Watchdog timer to monitor system activity
- Low supply current of 15 μA (typical)
- No external components required for operation
- Internal pull-up resistor at the MR input
Applications
- DSPs, microcontrollers, or microprocessors
- Industrial equipment
- Programmable controls
- Automotive systems
- Portable and battery-powered equipment
- Intelligent instruments
- Wireless communications systems
- Notebook and desktop computers
Q & A
- What is the primary function of the TPS3824-50DBVTG4?
The primary function is to monitor the supply voltage and generate a reset signal if the voltage drops below a predefined threshold, ensuring proper system initialization and timing supervision.
- What types of reset outputs are available on the TPS3824-50DBVTG4?
The device offers both active-low and active-high reset outputs.
- What is the purpose of the watchdog timer in the TPS3824-50DBVTG4?
The watchdog timer monitors system activity and generates a reset if the system fails to respond within a specified time frame.
- How does the manual reset input (MR) work?
The MR input allows an external logic signal to force a reset signal regardless of the supply voltage or the state of the watchdog timer.
- What is the typical supply current of the TPS3824-50DBVTG4?
The typical supply current is 15 μA.
- What is the operating temperature range of the TPS3824-50DBVTG4?
The operating temperature range is −40°C to 85°C, with some models (like TPS3823A-33) extending up to 125°C.
- What package type is the TPS3824-50DBVTG4 available in?
The device is available in a 5-pin SOT-23 package.
- Do I need external components for the TPS3824-50DBVTG4 to function?
No, the device does not require external components for operation.
- What are some common applications of the TPS3824-50DBVTG4?
Common applications include DSPs, microcontrollers, industrial equipment, automotive systems, and portable electronics.
- How does the input threshold voltage (VIT−) vary with temperature?
The input threshold voltage (VIT−) has a specified range that varies slightly with temperature, ensuring consistent operation across different temperatures.
