Overview
The TPS3851G18EDRBR is a precision voltage supervisor with an integrated watchdog timer, designed and manufactured by Texas Instruments. This component combines the functions of a voltage supervisor and a programmable watchdog timer, making it highly versatile for various applications. It features a high accuracy of 0.8% for the undervoltage threshold on the VDD pin and includes accurate hysteresis, ensuring reliable performance even in extreme temperature conditions. The device is packaged in a compact 3-mm × 3-mm, 8-pin VSON package, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer | Texas Instruments | Type | Voltage Supervisory |
| Mounting Style | SMD/SMT | Threshold Voltage | 1.8 V |
| Number of Inputs Monitored | 1 Input | Output Type | Active Low, Open Drain |
| Manual Reset | Manual Reset | Watchdog Timers | Watchdog |
| Battery Backup Switching | No Backup | Reset Delay Time | 200 ms |
| Supply Voltage - Max | 6.5 V | Minimum Operating Temperature | -40°C |
| Maximum Operating Temperature | +125°C | Accuracy | 0.8% |
| Series | TPS3851 | Brand | Texas Instruments |
| Supply Voltage - Min | 1.8 V | Low Quiescent Current | 10 µA (typical) |
| Package | VSON (DRB)-8 | Factory Pack Quantity | 3000 |
Key Features
- Precision voltage monitoring with 0.8% accuracy for the undervoltage threshold.
- User-programmable watchdog timeout, either by an external capacitor or factory-programmed default delay settings.
- Open-drain outputs and manual reset input (MR).
- Low quiescent current of 10 µA (typical).
- Compact 3-mm × 3-mm, 8-pin VSON package.
- High-precision reset delay timing with 15% accuracy.
- Watchdog disable feature to avoid undesired timeouts during development.
- Supports common rails from 1.8 V to 5.0 V with 4% and 7% undervoltage thresholds available.
Applications
The TPS3851G18EDRBR is suitable for a wide range of applications that require precise voltage monitoring and watchdog timer functionality. These include:
- Industrial control systems where reliable power-on reset and watchdog functions are critical.
- Automotive systems that demand high accuracy and robust temperature performance.
- Medical devices requiring precise voltage supervision and watchdog timers.
- Consumer electronics and embedded systems that need compact, low-power solutions for power management.
Q & A
- Q: What is the primary function of the TPS3851G18EDRBR?
A: The TPS3851G18EDRBR is a precision voltage supervisor with an integrated watchdog timer, designed to provide reliable power-on reset and watchdog functions.
- Q: What is the accuracy of the undervoltage threshold for the TPS3851G18EDRBR?
A: The undervoltage threshold accuracy is 0.8% over the operating temperature range of -40°C to +125°C.
- Q: What is the maximum operating temperature of the TPS3851G18EDRBR?
A: The maximum operating temperature is +125°C.
- Q: Can the watchdog timer be disabled on the TPS3851G18EDRBR?
A: Yes, the watchdog timer can be disabled via logic pins to avoid undesired timeouts during the development process.
- Q: What is the package type and size of the TPS3851G18EDRBR?
A: The TPS3851G18EDRBR is packaged in a 3-mm × 3-mm, 8-pin VSON package.
- Q: What is the quiescent current of the TPS3851G18EDRBR?
A: The typical quiescent current is 10 µA.
- Q: Can the reset delay time be adjusted on the TPS3851G18EDRBR?
A: Yes, the reset delay time features a high-precision timing with 15% accuracy and can be adjusted.
- Q: What is the supply voltage range for the TPS3851G18EDRBR?
A: The supply voltage range is from 1.8 V to 6.5 V.
- Q: Is the TPS3851G18EDRBR available with different undervoltage thresholds?
A: Yes, it supports common rails from 1.8 V to 5.0 V with 4% and 7% undervoltage thresholds available.
- Q: What warranty is offered for the TPS3851G18EDRBR purchased from Ovaga?
A: Ovaga offers a 1-year warranty on the TPS3851G18EDRBR, covering any defects in materials and workmanship under normal use.
