TPS3847085DBVR

Product Overview

Category

The TPS3847085DBVR belongs to the category of voltage supervisors.

Use

This product is primarily used for monitoring and supervising voltage levels in electronic systems.

Characteristics

• Voltage supervision range: 0.4V to 5.5V
• Adjustable threshold voltage
• Low quiescent current consumption
• Wide operating temperature range: -40°C to 125°C
• Small package size: SOT-23-5
• RoHS compliant

Package and Quantity

The TPS3847085DBVR is available in a small SOT-23-5 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply voltage range: 0.4V to 5.5V
• Threshold voltage options: adjustable
• Quiescent current: typically 1.5µA
• Operating temperature range: -40°C to 125°C
• Output type: active-low, open-drain
• Power-on reset delay time: typically 200ms
• Watchdog timer timeout period: typically 1.6s

Pin Configuration

The TPS3847085DBVR has the following pin configuration:

```

---

| | --|VDD |-- --|GND |-- --|MR |-- --|RST |-- |____| ```

• VDD: Supply voltage input
• GND: Ground reference
• MR: Manual reset input (active-low)
• RST: Reset output (active-low)

Functional Features

• Voltage monitoring: The TPS3847085DBVR continuously monitors the supply voltage and generates a reset signal when it falls below the programmed threshold.
• Manual reset: The manual reset input (MR) allows for an external reset signal to be applied, overriding the voltage monitoring function.
• Power-on reset delay: The device includes a power-on reset delay circuit to ensure stable operation during power-up.
• Watchdog timer: The TPS3847085DBVR incorporates a watchdog timer that generates a reset signal if the system fails to toggle a specific input within the specified timeout period.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows for compatibility with various electronic systems.
• Adjustable threshold voltage provides flexibility in voltage monitoring applications.
• Low quiescent current consumption minimizes power consumption in battery-powered devices.
• Small package size enables space-saving designs.
• RoHS compliance ensures environmental friendliness.

Disadvantages

• Lack of built-in hysteresis may result in potential oscillations near the threshold voltage.
• Limited number of available pin configurations may restrict certain system designs.

Working Principles

The TPS3847085DBVR operates by comparing the supply voltage against the programmed threshold voltage. When the supply voltage falls below the threshold, the reset output is activated, indicating a low-voltage condition. The manual reset input allows for an external reset signal to override the voltage monitoring function. Additionally, the device incorporates a power-on reset delay circuit and a watchdog timer to ensure reliable operation and prevent system lock-ups.

Application Field Plans

The TPS3847085DBVR finds application in various fields, including but not limited to: - Battery-powered devices - Industrial automation systems - Automotive electronics - Consumer electronics - Medical equipment

Alternative Models

Some alternative models that offer similar functionality to the TPS3847085DBVR include: - TPS3840x series from Texas Instruments - MAX823/MAX824 series from Maxim Integrated - ADM6315/ADM6316 series from Analog Devices

These alternative models provide comparable voltage supervision capabilities and can be considered as substitutes for the TPS3847085DBVR in specific applications.

Word count: 511