Overview
The TPS3125J18DBVR is a part of the TPS312x family of voltage supervisory circuits produced by Texas Instruments. This component is designed to provide voltage monitoring and timing supervision, primarily for DSP and processor-based systems. It is particularly useful in applications where reliable power rail monitoring and reset functionality are crucial.
The device is available in a small SOT-23-5 package and operates over a temperature range of –40°C to +85°C, making it suitable for a wide range of environments. The TPS3125J18DBVR offers features such as supply voltage supervision, power-on reset generation, manual reset input, and watchdog timer functionality, which are essential for ensuring system reliability and preventing malfunctions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBV) | |
| Pins | 5 | |
| Operating Temperature Range | –40 to 85 | °C |
| Minimum Supply Voltage | 0.75 | V |
| Supply Voltage Supervision Range | 1.2V, 1.5V, 1.8V, 3V (TPS3125 only) | V |
| Power-on Reset Delay Time | 180ms | ms |
| Supply Current (Typical) | 14μA | μA |
| Reset Output Type | Push-Pull (Active-Low and High), Open-Drain (Active-Low) | |
| Watchdog Timer Timeout | 0.8 to 2.1 seconds | s |
Key Features
- Minimum supply voltage of 0.75V
- Supply voltage supervision range: 1.2V, 1.5V, 1.8V, and 3V (TPS3125 devices only)
- Power-on reset generator with a fixed delay time of 180ms
- Manual reset input (TPS3123/5/6/8)
- Watchdog timer that retriggers the RESET output at VDD ≥ VIT
- Low supply current of 14μA (typical)
- Small SOT23-5 package
- Temperature range of –40°C to +85°C
- Reset output available in Push-Pull (Active-Low and High) and Open-Drain (Active-Low)
Applications
- Portable and battery-powered equipment
- Wireless communication systems
- Factory automation
- Servers
- Building automation
Q & A
- What is the minimum supply voltage for the TPS3125J18DBVR?
The minimum supply voltage is 0.75V.
- What are the available supply voltage supervision ranges for the TPS3125J18DBVR?
The supervision ranges include 1.2V, 1.5V, 1.8V, and 3V (specific to TPS3125 devices).
- What is the power-on reset delay time for the TPS3125J18DBVR?
The power-on reset delay time is 180ms.
- Does the TPS3125J18DBVR have a manual reset input?
- What is the typical supply current of the TPS3125J18DBVR?
The typical supply current is 14μA.
- In what package is the TPS3125J18DBVR available?
The device is available in a 5-pin SOT23-5 package.
- What is the operating temperature range of the TPS3125J18DBVR?
The operating temperature range is –40°C to +85°C.
- What types of reset outputs are available for the TPS3125J18DBVR?
The reset output is available in Push-Pull (Active-Low and High) and Open-Drain (Active-Low) configurations.
- What is the purpose of the watchdog timer in the TPS3125J18DBVR?
The watchdog timer retriggers the RESET output if the expected pulse from the processor does not arrive on time, indicating a potential software freeze or hang.
- In which applications is the TPS3125J18DBVR commonly used?
Common applications include portable and battery-powered equipment, wireless communication systems, factory automation, servers, and building automation.
