Overview
The TPS3430-Q1, produced by Texas Instruments, is a standalone automotive window watchdog timer designed for a wide range of automotive applications. It features programmable watchdog windows and reset delays, making it highly versatile and reliable. The device is AEC-Q100 qualified, ensuring it meets stringent automotive standards, and is also Functional Safety-capable, supporting the design of safety-critical systems. With its high accuracy and programmable features, the TPS3430-Q1 is an essential component for ensuring the reliability and safety of automotive systems.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage Range (VDD1, VDD2) | 1.6 | - | 6.5 | V |
| Watchdog Timeout Accuracy | - | ±2.5% | - | % |
| Watchdog Reset Delay Accuracy | - | ±2.5% | - | % |
| Supply Current (IDD) | - | 10 | - | µA |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
| Package Type | - | VSON (10-pin) | - | - |
| Package Size | - | 3.00 mm × 3.00 mm | - | - |
Key Features
- AEC-Q100 qualified for automotive applications with a device temperature grade 1: –40°C to +125°C ambient operating temperature.
- Functional Safety-capable with documentation available to aid in functional safety system design.
- Factory-programmed precision watchdog timers with ±2.5% accurate watchdog timeout and watchdog reset delays typical at 25°C.
- Watchdog disable feature via the SET pins to avoid undesired watchdog timeouts during development or power-on.
- User-programmable watchdog timeout and watchdog reset delay.
- Input voltage range: VDD = 1.6 V to 6.5 V.
- Low supply current: IDD = 10 µA (typical).
- Open-drain output.
- Small 3-mm × 3-mm, 10-Pin VSON package.
Applications
- Automotive telematics control unit.
- Drive assist ECU.
- Automotive front camera.
- Automotive gateway.
- Battery Management System (BMS).
- Automotive display module.
- Aftermarket telematics.
Q & A
- What is the operating temperature range of the TPS3430-Q1?
The TPS3430-Q1 operates within a junction temperature range of –40°C to +125°C. - How accurate are the watchdog timeouts and reset delays of the TPS3430-Q1?
The watchdog timeouts and reset delays are accurate to ±2.5% typical at 25°C. - Can the watchdog timer be disabled?
- What is the input voltage range for the TPS3430-Q1?
The input voltage range is from 1.6 V to 6.5 V.- What is the typical supply current of the TPS3430-Q1?
The typical supply current (IDD) is 10 µA.- What type of package does the TPS3430-Q1 come in?
The TPS3430-Q1 comes in a small 3-mm × 3-mm, 10-Pin VSON package.- Is the TPS3430-Q1 suitable for automotive applications?
- How can the watchdog reset delay be programmed?
The watchdog reset delay can be programmed by connecting an external capacitor to the CRST pin or by using factory-programmed default delay settings.- What is the purpose of the SET0 and SET1 pins?
The SET0 and SET1 pins are used to select the watchdog window ratios, timeouts, and to disable the watchdog.- What happens if the watchdog is asserted?
If the watchdog is asserted, the WDO pin goes into a low-impedance state, and all signals input to WDI are ignored until the WDO reset delay expires. - What is the input voltage range for the TPS3430-Q1?
