Overview
The TPS3813K33-Q1 is a processor supervisory circuit with watchdog functionality, designed and manufactured by Texas Instruments. This device is specifically qualified for automotive applications and meets the AEC-Q100 standards, ensuring reliability over a wide temperature range of –40°C to +125°C. It is primarily used for circuit initialization and timing supervision in DSPs, microcontrollers, and processor-based systems. The TPS3813K33-Q1 features a power-on reset generator, precision supply-voltage monitoring, and an open-drain reset output, making it a robust solution for safety-critical applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 2 V to 6 V | V |
| Threshold Voltages (VIT) | 2.5 V, 3 V, 3.3 V, 5 V | V |
| Supply Current | 9 μA (Typical) | μA |
| Reset Delay Time | 20 ms to 30 ms | ms |
| Watchdog Time-out Upper Limit | 0.2 s to 3 s (depending on configuration) | s |
| Package Type | 6-Pin SOT-23 | |
| Operating Temperature Range | –40°C to +125°C | °C |
| Storage Temperature Range | –65°C to +150°C | °C |
Key Features
- Qualified for automotive applications with AEC-Q100 certification.
- Window-watchdog with programmable delay and window ratio.
- Precision supply-voltage monitoring with fixed threshold voltages (VIT) of 2.5 V, 3 V, 3.3 V, and 5 V.
- Power-on reset generator with a fixed delay time of 25 ms.
- Open-drain reset output.
- Low supply current of 9 μA (Typical).
- 6-Pin SOT-23 package.
- No external components required for basic operation.
Applications
- On-board (OBC) and wireless charger systems.
- Driver monitoring systems.
- Digital cockpit processing units.
- ADAS (Advanced Driver Assistance Systems) domain controllers.
- Automotive telematics control units.
- Safety-critical systems, including those using DSPs, microcontrollers, and microprocessors.
Q & A
- What is the primary function of the TPS3813K33-Q1?
The primary function is to provide circuit initialization and timing supervision, particularly for DSPs and processor-based systems. - What are the threshold voltages (VIT) supported by the TPS3813K33-Q1?
The device supports threshold voltages of 2.5 V, 3 V, 3.3 V, and 5 V. - What is the typical supply current of the TPS3813K33-Q1?
The typical supply current is 9 μA. - What is the reset delay time of the TPS3813K33-Q1?
The reset delay time is typically 25 ms, ranging from 20 ms to 30 ms. - How is the watchdog time-out configured in the TPS3813K33-Q1?
The watchdog time-out can be configured using the WDT and WDR pins, allowing for programmable delay and window ratio. - What package type is the TPS3813K33-Q1 available in?
The device is available in a 6-Pin SOT-23 package. - What is the operating temperature range of the TPS3813K33-Q1?
The operating temperature range is –40°C to +125°C. - Is the TPS3813K33-Q1 qualified for automotive applications?
Yes, it is AEC-Q100 qualified. - What are some typical applications of the TPS3813K33-Q1?
Applications include on-board chargers, driver monitoring systems, digital cockpit processing units, ADAS domain controllers, and automotive telematics control units. - Does the TPS3813K33-Q1 require external components for basic operation?
No, it does not require external components for basic operation.
