Overview
The TL7733BIDR is an integrated-circuit supply-voltage supervisor designed by Texas Instruments for use as a reset controller in microcomputer and microprocessor systems. This device is part of the TL77xxB family, which monitors the supply voltage for undervoltage conditions and generates reset signals accordingly. It is particularly useful in systems requiring precise power-up and power-down sequencing.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.6 | 18 | V | |
| Operating Free-Air Temperature (TL7733BI) | -40 | 85 | °C | |
| Input Voltage (SENSE, RESIN) | 0 | 18 | V | |
| High-Level Output Current (RESET) | -16 | -20 | mA | |
| Low-Level Output Current (RESET) | 16 | 20 | mA | |
| Reference Voltage (REF) | 2.48 | 2.53 | 2.58 | V |
| Negative-Going Input Threshold Voltage (SENSE) | 3.03 | 3.08 | 3.13 | V |
| Hysteresis (SENSE) | 10 | mV |
Key Features
- Power-On Reset Generator: Automatically generates a reset signal during power-up if the supply voltage is below the threshold.
- Automatic Reset Generation After Voltage Drop: Resets the system if the supply voltage drops below the specified threshold.
- Precision Voltage Sensor: Monitors the supply voltage with high precision.
- Temperature-Compensated Voltage Reference: Ensures stable operation over a wide temperature range.
- True and Complement Reset Outputs: Provides both active high and active low reset outputs.
- Externally Adjustable Pulse Duration: Allows the user to set a custom time delay for the reset signal using an external capacitor.
- Ultra-Low Power Consumption: Typical current consumption of 250 nA, making it suitable for power-sensitive applications.
Applications
- Wireless Communication Systems
- Factory Automation
- Building Automation
- Servers
- Notebooks and Desktop Computers
- Set-Top Boxes (STB) and Digital Video Recorders (DVR)
Q & A
- What is the primary function of the TL7733BIDR?
The primary function of the TL7733BIDR is to monitor the supply voltage and generate reset signals if the voltage drops below a specified threshold.
- What is the operating temperature range for the TL7733BI?
The operating temperature range for the TL7733BI is from -40°C to 85°C.
- How is the reset pulse duration adjusted in the TL7733BIDR?
The reset pulse duration can be adjusted using an external capacitor connected to the CT pin. The time delay is determined by the value of the external capacitor.
- What are the typical high-level and low-level output currents for the RESET pin?
The typical high-level output current is -16 mA, and the typical low-level output current is 16 mA.
- What is the reference voltage output of the TL7733BIDR?
The reference voltage output is approximately 2.53 V.
- What is the negative-going input threshold voltage for the SENSE input?
The negative-going input threshold voltage for the SENSE input is approximately 3.08 V.
- How does the TL7733BIDR handle hysteresis at the SENSE input?
The TL7733BIDR has a hysteresis of about 10 mV at the SENSE input to prevent oscillations.
- What are some common applications of the TL7733BIDR?
Common applications include wireless communication systems, factory automation, building automation, servers, notebooks and desktop computers, and set-top boxes (STB) and digital video recorders (DVR).
- What is the typical power consumption of the TL7733BIDR?
The typical power consumption is 250 nA, making it suitable for power-sensitive applications.
- How does the device protect against false triggering during undervoltage conditions?
A current-limiting resistor in series with the CT pin can be used to prevent false triggering during undervoltage conditions.
