Overview
The TPS3825-33DBVTG4 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 falls below a predefined threshold. The TPS3825-33DBVTG4 is particularly useful in ensuring proper system reset and preventing system malfunctions due to voltage drops or watchdog timer expirations.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.5 V, 3 V, 3.3 V, 5 V | V |
| Threshold Voltage (VIT-) | 2.88 to 3.00 V (for 3.3 V version) | V |
| Watchdog Time Out | 1.6 s | s |
| Delay Time | 120 to 300 ms | ms |
| Supply Current | 15 μA (typical) | μA |
| Operating Temperature Range | −40°C to 85°C | °C |
| Package | 5-pin SOT-23 | |
| Reset Output | Active-low and active-high available |
Key Features
- Power-on reset generator with a fixed delay time of 200 ms
- Manual reset input (MR) to force a reset
- Watchdog timer with time-out options
- Supply voltage supervision with fixed-sense threshold voltage
- Low supply current of 15 μA (typical)
- Available in active-low, active-high, and open-drain reset outputs
- No external components required
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 TPS3825-33DBVTG4?
The primary function is to monitor the supply voltage and generate a reset signal if the voltage falls below a predefined threshold. - What are the available reset output types for the TPS3825-33DBVTG4?
The device offers active-low, active-high, and open-drain reset outputs. - What is the typical supply current of the TPS3825-33DBVTG4?
The typical supply current is 15 μA. - What is the operating temperature range of the TPS3825-33DBVTG4?
The operating temperature range is −40°C to 85°C. - What package type is the TPS3825-33DBVTG4 available in?
The device is available in a 5-pin SOT-23 package. - Does the TPS3825-33DBVTG4 require external components for operation?
No, the device does not require external components for operation. - What is the watchdog time-out period for the TPS3825-33DBVTG4?
The watchdog time-out period is 1.6 seconds. - How does the manual reset input (MR) function on the TPS3825-33DBVTG4?
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 are some common applications for the TPS3825-33DBVTG4?
Common applications include DSPs, microcontrollers, industrial equipment, automotive systems, and portable electronics. - What is the threshold voltage for the 3.3 V version of the TPS3825-33DBVTG4?
The threshold voltage (VIT-) for the 3.3 V version is between 2.88 V and 3.00 V.
