Overview
The TPS3820-33DBVRG4, part of the TPS382x family from Texas Instruments, is a voltage monitor with a watchdog timer designed to provide circuit initialization and timing supervision. This device is particularly suited for DSP and processor-based systems, ensuring proper system reset and monitoring supply voltages. The TPS3820-33DBVRG4 operates with a supply voltage supervision range of 3.3 V and features a fixed delay time of 200 ms for power-on reset and watchdog time-out options.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Supervision Range | 3.3 V | V |
| Power-on Reset Delay Time | 200 ms | ms |
| Watchdog Time-out | 1.6 s (typical) | s |
| Supply Current | 15 μA (typical) | μA |
| Operating Temperature Range | −40°C to 85°C | °C |
| Package Type | 5-pin SOT-23 | |
| Reset Output Type | Active-low, Active-high, Open-drain (depending on the specific device variant) | |
| Manual Reset Input | Yes |
Key Features
- Power-on Reset Generator: With a fixed delay time of 200 ms.
- Manual Reset Input: Allows an external logic signal to force a reset.
- Watchdog Timer: Monitors system activity and issues a reset if the system fails to retrigger the watchdog within the specified time-out interval.
- Supply Voltage Supervision: Monitors supply voltages of 3.3 V and keeps the reset active as long as the supply voltage remains below the threshold voltage.
- Low Supply Current: Typical supply current of 15 μA.
- Compact Package: Available in a 5-pin SOT-23 package.
- Temperature Range: Operates over a temperature range of −40°C to 85°C.
Applications
- DSPs, Microcontrollers, and Microprocessors: Ensures proper initialization and timing supervision.
- Industrial Equipment: Monitors and resets systems in industrial environments.
- Programmable Controls: Used in programmable logic controllers and other control systems.
- Automotive Systems: Suitable for automotive applications requiring robust voltage monitoring.
- Portable and Battery-Powered Equipment: Ideal for low-power, battery-operated devices.
- Intelligent Instruments and Wireless Communications Systems: Ensures reliable operation in various communication and instrumentation systems.
- Notebook and Desktop Computers: Used in computer systems to monitor power supply and system health.
Q & A
- What is the primary function of the TPS3820-33DBVRG4?
The primary function is to provide circuit initialization and timing supervision, including power-on reset and watchdog timer capabilities.
- What is the supply voltage supervision range for the TPS3820-33DBVRG4?
The device monitors a supply voltage of 3.3 V.
- What is the typical delay time for the power-on reset?
The typical delay time for the power-on reset is 200 ms.
- Does the TPS3820-33DBVRG4 have a manual reset input?
Yes, it has a manual reset input that allows an external logic signal to force a reset.
- What is the watchdog time-out period for this device?
The watchdog time-out period is typically 1.6 seconds.
- What is the typical supply current of the TPS3820-33DBVRG4?
The typical supply current is 15 μA.
- In what package is the TPS3820-33DBVRG4 available?
The device is available in a 5-pin SOT-23 package.
- What is the operating temperature range of the TPS3820-33DBVRG4?
The operating temperature range is −40°C to 85°C.
- Can the TPS3820-33DBVRG4 be used in automotive systems?
Yes, it is suitable for automotive applications requiring robust voltage monitoring.
- What types of reset outputs are available for the TPS382x family?
The reset outputs are available in active-low, active-high, and open-drain configurations depending on the specific device variant.
