Overview
The TLV809J25DBZR is a 3-pin supply voltage supervisor manufactured by Texas Instruments. This device is designed to provide circuit initialization and timing supervision, ensuring that the power supply is above a certain voltage threshold. It features an active-low push-pull RESET output and an internal timer to delay the RESET signal when the supply voltage rises above the threshold voltage. The TLV809J25DBZR is particularly useful in applications where reliable power supply monitoring is crucial.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 2.5 | 6 | V | |
| Threshold Voltage (VIT) | 2.25 | V | ||
| RESET Output Voltage (VOL) | 0.4 | V | ||
| RESET Output Current (IOH) | -500 | µA | ||
| ESD Rating (Human-Body Model) | ±2000 | V | ||
| ESD Rating (Charged-Device Model) | ±500 | V | ||
| Operating Temperature Range | -40 | 85 | °C | |
| Package Type | SOT-23 (DBZ) |
Key Features
- Supply Voltage Monitoring: The device actively monitors the supply voltage to ensure it is above a certain threshold voltage, which is approximately 10% below several standard supply voltages (e.g., 2.5 V, 3.0 V, 3.3 V, 5.0 V).
- RESET Output: Features an active-low push-pull RESET output that asserts when the supply voltage is below the threshold voltage and deasserts after a delay time when the voltage rises above the threshold.
- Internal Timer: Includes an internal timer to delay the RESET signal, ensuring stable operation during power-up and power-down phases.
- Transient Rejection: Built-in rejection of fast transients on the VDD pin to prevent false resets.
- Low Power Consumption: Designed to operate with low power consumption, making it suitable for a wide range of applications.
Applications
- Power Supply Monitoring: Ideal for monitoring power supplies in various electronic systems to ensure reliable operation.
- Microcontroller and Microprocessor Systems: Used to supervise the power supply in microcontroller and microprocessor-based systems, ensuring proper initialization and operation.
- Industrial Control Systems: Suitable for industrial control systems where robust power supply monitoring is essential.
- Consumer Electronics: Can be used in consumer electronics to monitor and manage power supply conditions effectively.
Q & A
- What is the primary function of the TLV809J25DBZR?
The primary function is to monitor the supply voltage and provide a RESET signal if the voltage falls below a specified threshold. - What is the threshold voltage for the TLV809J25DBZR model?
The threshold voltage is approximately 2.25 V, which is 10% below the 2.5 V supply voltage. - What type of RESET output does the TLV809J25DBZR have?
The device has an active-low push-pull RESET output. - How does the TLV809J25DBZR handle power-up and power-down phases?
The device includes an internal timer to delay the RESET signal during power-up and power-down phases, ensuring stable operation. - What is the recommended operating temperature range for the TLV809J25DBZR?
The recommended operating temperature range is -40°C to 85°C. - What package type is the TLV809J25DBZR available in?
The device is available in a SOT-23 (DBZ) package. - How does the TLV809J25DBZR protect against ESD?
The device has ESD ratings of ±2000 V for the Human-Body Model and ±500 V for the Charged-Device Model. - What is the purpose of the bypass capacitor in the TLV809J25DBZR circuit?
A 0.1-µF bypass capacitor is recommended to ensure best stability of the threshold voltage and to filter out noise on the supply pins. - In what types of systems is the TLV809J25DBZR commonly used?
The device is commonly used in microcontroller and microprocessor systems, industrial control systems, and consumer electronics. - How does the TLV809J25DBZR reject fast transients on the VDD pin?
The device has built-in rejection of fast transients based on their duration and amplitude, preventing false resets).
