Overview
The TPS3813J25DBVRG4, part of the TPS3813xxx family of supervisory circuits from Texas Instruments, is designed to provide circuit initialization and timing supervision primarily for DSPs and processor-based systems. This device ensures proper system reset and monitoring of the supply voltage, making it essential for various critical applications. During power-on, the RESET pin is asserted when the supply voltage (VDD) exceeds 1.1V and remains low until VDD rises above the threshold voltage (VIT). The device also features a window-watchdog timer with programmable delay and window ratio, enhancing its suitability for safety-critical systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | 6-Pin SOT-23 | |
| Body Size | 2.90mm × 1.60mm | |
| Supply Voltage Range | 2V to 6V | V |
| Threshold Voltage (VIT) | 2.25V (for TPS3813J25) | V |
| Supply Current | 9µA (typical) | A |
| Power-on Reset Delay | 25ms (typical) | ms |
| Temperature Range | –40°C to 85°C | °C |
| Junction-to-Ambient Thermal Resistance (RθJA) | 208.5 °C/W | °C/W |
| Low-level Output Voltage (VOL) | 0.2V (VDD = 2V to 6V, IOL = 500µA) | V |
Key Features
- Window-watchdog with programmable delay and window ratio
- Power-on reset generator with a fixed delay time of 25ms
- Precision supply voltage monitor (VIT) for 2.5V, 3V, 3.3V, and 5V
- Open-drain reset output
- Low supply current of 9µA (typical)
- Operating temperature range: –40°C to 85°C
Applications
- Active Antenna System mMIMO (AAS)
- Storage area network
- Electricity meters
- Safety critical systems
- Infusion pump
- HVAC controller
Q & A
- What is the primary function of the TPS3813J25DBVRG4? The primary function is to provide circuit initialization and timing supervision for DSPs and processor-based systems.
- What is the threshold voltage (VIT) for the TPS3813J25DBVRG4? The threshold voltage (VIT) is 2.25V.
- What is the typical power-on reset delay time? The typical power-on reset delay time is 25ms.
- What is the operating temperature range of the TPS3813J25DBVRG4? The operating temperature range is –40°C to 85°C.
- What is the package type and size of the TPS3813J25DBVRG4? The package type is 6-Pin SOT-23, and the body size is 2.90mm × 1.60mm.
- How is the watchdog timer configured? The watchdog timer is configured by connecting the WDT and WDR pins to GND, VDD, or using an external capacitor.
- What is the supply current of the TPS3813J25DBVRG4? The supply current is 9µA (typical).
- What are some typical applications of the TPS3813J25DBVRG4? Typical applications include Active Antenna System mMIMO (AAS), storage area networks, electricity meters, safety critical systems, infusion pumps, and HVAC controllers.
- How does the device handle supply voltage drops below the threshold voltage? When the supply voltage drops below the threshold voltage (VIT), the output transitions low again.
- Is an external capacitor required for the power supply? No, an external capacitor is not required, but it is recommended for noisy input supplies.
