Overview
The TPS3823-30DBVTG4, produced by Texas Instruments, is a voltage monitor with a watchdog timer designed primarily for circuit initialization and timing supervision in DSP and processor-based systems. This device is part of the TPS382x family and is particularly useful in ensuring that the system operates within specified voltage limits and maintains proper timing and reset functions.
The TPS3823-30DBVTG4 features a power-on reset generator, manual reset input, and various reset output configurations. It also includes a watchdog timer to monitor system activity and issue a reset if the system fails to respond within a specified time-out interval.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.5 V, 3 V, 3.3 V, 5 V | V |
| Watchdog Time Out | 0.9 to 2.5 s | s |
| Delay Time | 120 to 300 ms | ms |
| Supply Current | 15 μA (typical) | μA |
| Operating Temperature Range | −40°C to 85°C (−40°C to 125°C for TPS3823A-33) | °C |
| Package Type | 5-pin SOT-23 | |
| Body Size | 2.90 mm × 1.60 mm | mm |
Key Features
- Power-on reset generator with a fixed delay time of 200 ms
- Manual reset input (MR) to force a reset
- Reset output available in active-low, active-high, and open-drain configurations
- Watchdog timer to monitor system activity and issue a reset if the system fails to respond within the time-out interval
- Supply voltage supervision with internal threshold voltage (VIT−) and hysteresis (VHYS)
- Low supply current of 15 μA (typical)
- Compact 5-pin SOT-23 package
- Operating temperature range from −40°C to 85°C (−40°C to 125°C for TPS3823A-33)
Applications
- DSPs, microcontrollers, or microprocessors
- Industrial equipment
- Programmable controls
- Automotive systems
- Portable and battery-powered equipment
- Intelligent instruments
- Wireless communications systems
- Notebook and desktop computers
Q & A
- What is the primary function of the TPS3823-30DBVTG4?
The primary function is to provide circuit initialization and timing supervision, ensuring the system operates within specified voltage limits and maintains proper timing and reset functions.
- What are the available reset output configurations for the TPS3823-30DBVTG4?
The reset output is available in active-low, active-high, and open-drain configurations.
- What is the watchdog time-out interval for the TPS3823-30DBVTG4?
The watchdog time-out interval ranges from 0.9 to 2.5 seconds.
- What is the typical supply current of the TPS3823-30DBVTG4?
The typical supply current is 15 μA.
- What is the operating temperature range of the TPS3823-30DBVTG4?
The operating temperature range is from −40°C to 85°C (−40°C to 125°C for TPS3823A-33).
- What package type is the TPS3823-30DBVTG4 available in?
The device is available in a 5-pin SOT-23 package.
- What are some common applications for the TPS3823-30DBVTG4?
Common applications include DSPs, microcontrollers, industrial equipment, automotive systems, and portable electronics.
- How does the manual reset input (MR) function on the TPS3823-30DBVTG4?
The manual reset input (MR) allows for forcing a reset by pulling it low; the reset remains low as long as MR is low and for the time-out period after MR goes high.
- What is the purpose of the watchdog timer input (WDI) on the TPS3823-30DBVTG4?
The watchdog timer input (WDI) monitors system activity and issues a reset if the system fails to retrigger the watchdog circuit within the specified time-out interval.
- Does the TPS3823-30DBVTG4 require any external components for operation?
No external components are required for the basic operation of the device.
