Overview
The TPS3825-50DBVTG4 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 features a power-on reset generator, manual reset input, and various reset output configurations. The TPS3825-50DBVTG4 ensures proper system reset by monitoring the supply voltage and asserting the reset signal when the voltage drops below a predefined threshold.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Supply Voltage Range | - | 2.5 V, 3 V, 3.3 V, 5 V | - | - | V |
| Power-on Reset Delay Time | VDD ≥ VIT− + 0.2 V | 120 ms | 200 ms | 300 ms | ms |
| Watchdog Time Out | VDD ≥ VIT− + 0.2 V | 0.9 s | 1.6 s | 2.5 s | s |
| Supply Current | WDI, MR, and outputs unconnected | 15 μA | 25 μA | - | μA |
| Operating Temperature Range | - | -40°C | - | 85°C | °C |
| Package Type | - | - | - | - | 5-Pin SOT-23 |
Key Features
- Power-on reset generator with fixed delay times (200 ms for TPS3825-50DBVTG4)
- Manual reset input (MR) to force a reset
- Reset output available in active-low, active-high, and open-drain configurations
- Watchdog timer with options of 200 ms and 1.6 s
- Supply voltage supervision range: 2.5 V, 3 V, 3.3 V, 5 V
- Low supply current of 15 μA (typical)
- Operating temperature range: -40°C to 85°C
- No external components required due to internal voltage divider
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 TPS3825-50DBVTG4?
The primary function is to provide circuit initialization and timing supervision for DSP and processor-based systems.
- What are the available reset output configurations for the TPS3825-50DBVTG4?
The reset output is available in active-low, active-high, and open-drain configurations.
- What is the watchdog time out period for the TPS3825-50DBVTG4?
The watchdog time out period is 1.6 seconds.
- What is the typical supply current of the TPS3825-50DBVTG4?
The typical supply current is 15 μA.
- What is the operating temperature range of the TPS3825-50DBVTG4?
The operating temperature range is -40°C to 85°C.
- Does the TPS3825-50DBVTG4 require external components for operation?
No, it does not require external components due to its internal voltage divider.
- What package type is the TPS3825-50DBVTG4 available in?
The TPS3825-50DBVTG4 is available in a 5-Pin SOT-23 package.
- What are some common applications of the TPS3825-50DBVTG4?
Common applications include DSPs, microcontrollers, industrial equipment, automotive systems, and portable electronics.
- How does the manual reset input (MR) function on the TPS3825-50DBVTG4?
The manual reset input (MR) allows for forcing a reset by pulling it low; the reset remains low as long as MR is low and for the time-out period after MR goes high.
- What is the power-on reset delay time for the TPS3825-50DBVTG4?
The power-on reset delay time is typically 200 ms.
