Overview
The TPS3840DL31DBVRQ1 is an automotive high-input voltage supervisor IC produced by Texas Instruments. This device is designed for use in automotive and other low-power applications, offering a combination of low power consumption, high accuracy, and low propagation delay. It features a manual reset and a programmable reset time delay, making it versatile for various system monitoring needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Texas Instruments | |
| Package Type | SOT-23-5 | |
| Operating Temperature | -40°C to 125°C | °C |
| Input Supply Voltage (VDD) | 1.5 V to 10 V | V |
| Threshold Voltage (VIT-) | 3.1 V | V |
| Reset Timeout | 619 ms (Typical) | ms |
| Output Type | Open Drain or Open Collector, Active Low | |
| Supply Current (IDD) | 350 nA (Typ), 700 nA (Max) | nA |
| Manual Reset Logic Low Input (VMR_L) | 600 mV | mV |
| CT Pin Internal Resistance (RCT) | 350 kΩ to 650 kΩ | kΩ |
Key Features
- AEC-Q100 qualified with device temperature grade 1: –40°C to +125°C ambient operating temperature
- Wide operating voltage range: 1.5 V to 10 V
- Fixed threshold voltage with high accuracy: 1% (Typical), 1.5% (Maximum)
- Built-in hysteresis and glitch immunity protection
- Programmable capacitor-based reset time delay: 50 µs (no capacitor) to 6.2 s (10-µF)
- Active-low manual reset (MR) and open-drain or open-collector output
- Low power-on reset voltage (VPOR) and low open-drain output leakage current
- Fast start-up delay: 350 µs (Maximum)
Applications
- Automotive head unit and cluster
- Automotive display, integrated cockpit, and driver monitoring
- Telematics control unit and emergency call systems
- Battery-powered and low-power applications
Q & A
- What is the TPS3840DL31DBVRQ1 used for?
The TPS3840DL31DBVRQ1 is used as a voltage supervisor IC, monitoring the input voltage and providing a reset signal when the voltage falls below a specified threshold or when a manual reset is triggered.
- What is the operating temperature range of the TPS3840DL31DBVRQ1?
The operating temperature range is –40°C to 125°C.
- What is the input supply voltage range for the TPS3840DL31DBVRQ1?
The input supply voltage range is 1.5 V to 10 V.
- How is the reset time delay programmed in the TPS3840DL31DBVRQ1?
The reset time delay can be programmed by connecting an external capacitor between the CT pin and ground.
- What is the typical supply current of the TPS3840DL31DBVRQ1?
The typical supply current is 350 nA, with a maximum of 700 nA.
- Is the TPS3840DL31DBVRQ1 AEC-Q100 qualified?
- What are the common applications of the TPS3840DL31DBVRQ1?
- What type of output does the TPS3840DL31DBVRQ1 have?
The TPS3840DL31DBVRQ1 has an open-drain or open-collector output, which is active-low.
- How does the manual reset function work on the TPS3840DL31DBVRQ1?
The manual reset is triggered by pulling the MR pin to a logic low, asserting the reset signal. The reset signal is cleared when the MR pin is left floating or pulled to a logic high and the reset time delay expires.
- What is the significance of the CT pin in the TPS3840DL31DBVRQ1?
The CT pin is used to program the reset time delay by connecting an external capacitor to this pin.
