Overview
The TPS3306-18QDRQ1 is a dual processor supervisory circuit designed by Texas Instruments, primarily for use in DSP and processor-based systems that require two independent supply voltages. This component is part of the TPS3306 family, which is qualified for automotive applications and is suitable for various embedded systems and portable battery-powered equipment. The TPS3306-18QDRQ1 monitors two supply voltages, typically 3.3 V and 1.8 V, and provides essential functions such as power-on reset, watchdog timer, and power-fail detection.
Key Specifications
| Specification | Value |
|---|---|
| Supply Voltage Range | 2.7 V to 6 V |
| Typical Supply Current | 15 µA |
| Threshold Voltages | 2.93 V (VDD), 1.68 V (VDD2) |
| Power-On Reset Delay Time | 100 ms |
| Watchdog Timer Time-Out | 0.8 s |
| Package Type | SO-8 |
| Operating Temperature Range | –40°C to +85°C |
| Reset Output Type | Open-Drain |
| Power-Fail Output Type | Open-Drain |
Key Features
- Voltage Monitor for Power Fail or Low-Battery Warning
- Watchdog Timer With 0.8-s Time-Out
- Power-On Reset Generator With Integrated 100-ms Delay Time
- Open-Drain Reset and Power-Fail Output
- Defined RESET Output From VDD ≥ 1.1 V
- Integrated Power-Fail (PFI) Comparator
Applications
- Multivoltage DSPs and Processors
- Portable Battery-Powered Equipment
- Embedded Control Systems
- Intelligent Instruments
- Automotive Systems
Q & A
- What is the primary function of the TPS3306-18QDRQ1? The primary function is to monitor two independent supply voltages and provide power-on reset, watchdog timer, and power-fail detection for DSP and processor-based systems.
- What are the typical supply voltages monitored by the TPS3306-18QDRQ1? The component typically monitors 3.3 V and 1.8 V supply voltages.
- What is the power-on reset delay time of the TPS3306-18QDRQ1? The power-on reset delay time is 100 ms.
- How does the watchdog timer function in the TPS3306-18QDRQ1? The watchdog timer is triggered by a positive or negative transition of WDI and has a time-out interval of 0.8 s. If the supervising system fails to retrigger the watchdog within this interval, the RESET output becomes active.
- What is the operating temperature range of the TPS3306-18QDRQ1? The operating temperature range is –40°C to +85°C.
- What type of package does the TPS3306-18QDRQ1 come in? The component comes in an 8-pin SO-8 package.
- Is the TPS3306-18QDRQ1 qualified for automotive applications? Yes, it is qualified for automotive applications.
- What is the typical supply current of the TPS3306-18QDRQ1? The typical supply current is 15 µA.
- How does the power-fail detection work in the TPS3306-18QDRQ1? The integrated power-fail (PFI) comparator with a separate open-drain (PFO) output can be used for low-battery detection, power-fail warning, or monitoring a power supply other than the main supply.
- What are some common applications of the TPS3306-18QDRQ1? Common applications include multivoltage DSPs and processors, portable battery-powered equipment, embedded control systems, intelligent instruments, and automotive systems.
