Overview
The TPS3110K33DBVR is a supervisory circuit from Texas Instruments, designed to provide circuit initialization and timing supervision primarily for DSP and processor-based systems. This device operates from supply voltages ranging from 0.9 V to 3.6 V and is characterized by its ultralow supply current and high trip-point accuracy. During power-on, the RESET output is asserted low when the supply voltage (VDD) exceeds 0.4 V and remains low until VDD surpasses the threshold voltage. An internal timer then delays the transition of the RESET signal from low to high, ensuring proper system reset.
The TPS3110K33DBVR features an active-low push/pull RESET output and includes a watchdog timer to monitor the operation of microprocessors. It also has a manual reset pin (MR) that can force the outputs low regardless of the sensed voltages. The device is available in a 6-pin SOT-23 package and is designed for operation over a temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 0.9 V to 3.6 V | V |
| Threshold Voltages | 0.9 V, 1.2 V, 1.5 V, 1.6 V, 2 V, 3.3 V | V |
| Trip-Point Accuracy | 0.75% | % |
| Supply Current | 1.2 μA (Typical) | μA |
| Power-On Reset Delay Time | 130 ms | ms |
| RESET Output Type | Active-low push/pull | |
| Watchdog Timer Time-out Period | 0.55 s to 1.65 s | s |
| Package Type | 6-pin SOT-23 | |
| Operating Temperature Range | –40°C to 125°C | °C |
Key Features
- Precision supply voltage supervision with high trip-point accuracy of 0.75%.
- Ultralow supply current of 1.2 μA (typical).
- RESET defined with input voltages as low as 0.4 V.
- Power-on reset generator with a delay time of 130 ms.
- Active-low push/pull RESET output.
- Integrated watchdog timer to monitor microprocessor operation.
- Manual reset pin (MR) to force the outputs low regardless of sensed voltages.
- SENSE input for monitoring voltages other than the input supply.
Applications
- Systems using low-power DSPs, microcontrollers, or microprocessors.
- Portable and battery-powered equipment.
- Intelligent instruments.
- Wireless communication systems.
- Industrial equipment.
- Notebook and desktop computers.
Q & A
- What is the primary function of the TPS3110K33DBVR?
The primary function is to provide circuit initialization and timing supervision for DSP and processor-based systems.
- What is the supply voltage range for the TPS3110K33DBVR?
The supply voltage range is from 0.9 V to 3.6 V.
- What is the trip-point accuracy of the TPS3110K33DBVR?
The trip-point accuracy is 0.75%.
- How does the watchdog timer work in the TPS3110K33DBVR?
The watchdog timer must be periodically triggered by a positive or negative transition of the WDI input. If the supervising system fails to retrigger the watchdog circuit within the time-out interval, RESET becomes active.
- What is the purpose of the manual reset pin (MR) in the TPS3110K33DBVR?
The manual reset pin allows an operator or logic circuitry to initiate a reset by pulling MR low.
- What type of RESET output does the TPS3110K33DBVR have?
The TPS3110K33DBVR has an active-low push/pull RESET output.
- What is the power-on reset delay time for the TPS3110K33DBVR?
The power-on reset delay time is 130 ms.
- What is the typical supply current of the TPS3110K33DBVR?
The typical supply current is 1.2 μA.
- In what package is the TPS3110K33DBVR available?
The device is available in a 6-pin SOT-23 package.
- What is the operating temperature range for the TPS3110K33DBVR?
The operating temperature range is –40°C to 125°C.
