Overview
The TPS3851H33EDRBR is a precision voltage supervisor with an integrated programmable watchdog timer, manufactured by Texas Instruments. This device combines high accuracy voltage monitoring with a flexible watchdog timer, making it suitable for a wide range of applications. The TPS3851 features a 0.8% accuracy for the undervoltage threshold and includes accurate hysteresis to ensure stable operation in tight tolerance systems. It also includes a manual reset input, watchdog disable feature, and factory-programmed precision watchdog and reset timers. The device is available in a compact 3-mm × 3-mm, 8-pin VSON package and operates over a junction temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Number of supplies monitored | 1 | Threshold voltage 1 (typ) (V) | 1.674, 1.728, 2.325, 2.4, 2.79, 2.88, 3.069, 3.168, 4.65, 4.8 |
| Features | Manual reset capable, Timeout watchdog, Undervoltage monitor only, Watchdog disable, Watchdog timer | Reset threshold accuracy (%) | 0.8 |
| Iq (typ) (mA) | 0.01 | Output driver type/reset output | Active-low, Open-drain |
| Time delay (ms) | 200 | Supply voltage (min) (V) | 1.6 |
| Supply voltage (max) (V) | 6.5 | Rating | Catalog |
| Watchdog timer WDI (s) | Programmable | Package/Case | VSON (DRB)-8 |
| Junction operating temperature range | –40°C to +125°C |
Key Features
- Precision voltage supervisor with 0.8% accuracy for undervoltage threshold
- Programmable watchdog timer with external capacitor or factory-programmed default delay settings
- Manual reset input (MR) for processor or logic circuit control
- Watchdog disable feature to avoid undesired timeouts during development
- Low quiescent current: IDD = 10 µA (typical)
- Open-drain outputs for flexible integration
- Available in a small 3-mm × 3-mm, 8-pin VSON package
Applications
- WLAN/Wi-Fi access points
- Wireless security cameras
- IP network cameras
- String inverters
- Blood pressure monitors
- Electricity meters
Q & A
- Q: What is the accuracy of the undervoltage threshold for the TPS3851H33EDRBR?
A: The TPS3851H33EDRBR has a 0.8% accuracy for the undervoltage threshold. - Q: How can the watchdog timer be programmed?
A: The watchdog timer can be programmed either by an external capacitor or by factory-programmed default delay settings. - Q: What is the quiescent current of the TPS3851H33EDRBR?
A: The typical quiescent current (IDD) is 10 µA. - Q: What is the operating temperature range of the TPS3851H33EDRBR?
A: The junction operating temperature range is –40°C to +125°C. - Q: What package type is the TPS3851H33EDRBR available in?
A: The device is available in a 3-mm × 3-mm, 8-pin VSON package. - Q: Can the watchdog timer be disabled?
A: Yes, the watchdog timer can be disabled via logic pins to avoid undesired timeouts during the development process. - Q: What is the supply voltage range for the TPS3851H33EDRBR?
A: The supply voltage range is from 1.6 V to 6.5 V. - Q: Does the TPS3851H33EDRBR have a manual reset feature?
A: Yes, it includes a manual reset input (MR) that allows a processor or other logic circuits to initiate a reset. - Q: What types of applications is the TPS3851H33EDRBR suitable for?
A: It is suitable for applications such as WLAN/Wi-Fi access points, wireless security cameras, IP network cameras, string inverters, blood pressure monitors, and electricity meters. - Q: What is the warranty period for the TPS3851H33EDRBR from Ovaga?
A: Ovaga offers a 1-year warranty on the TPS3851H33EDRBR.
