Overview
The TLC7733IDR is a micropower supply voltage supervisor produced by Texas Instruments. This component is designed to provide reset control and undervoltage supervision, primarily in microcomputer and microprocessor systems. It features a precision voltage sensor and a temperature-compensated voltage reference, ensuring reliable operation across various temperature ranges.
The TLC7733IDR supports power-on reset and power-down control, making it suitable for systems that require robust voltage monitoring and reset functions. It also includes additional logic for controlling static memories with battery backup during power failures.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 2 to 6 | V |
| Input Voltage (VI) | 0 to VDD | V |
| High-Level Input Voltage at RESIN and CONTROL | 0.7 × VDD | V |
| Low-Level Input Voltage at RESIN and CONTROL | 0.2 × VDD | V |
| High-Level Output Current (IOH) | -2 mA (V ≥ 2.7 V) | mA |
| Low-Level Output Current (IOL) | 2 mA (VDD ≥ 2.7 V) | mA |
| Input Current (II) at SENSE | 5 to 10 µA (VI = 5 V) | µA |
| Supply Current (IDD) | 9 to 16 µA | µA |
| Threshold Voltage (VIT-) | 2.855 to 3.03 V | V |
| Hysteresis Voltage (Vhys) | 70 mV | mV |
| Power-Up Reset Voltage (Vres) | 1 V (IOL = 20 µA) | V |
| Operating Free-Air Temperature Range (TA) | -40 to 125 °C | °C |
Key Features
- Precision Voltage Sensor: Ensures accurate voltage monitoring with a temperature-compensated voltage reference.
- Automatic Reset Generation: Generates a reset signal when the supply voltage drops below the threshold voltage.
- Power-On Reset and Undervoltage Supervision: Provides robust reset control during power-on and undervoltage conditions.
- Power-Down Control: Supports control of static RAM during power failures, ensuring data integrity.
- Low Supply Current: Operates with a low supply current, making it suitable for battery-powered devices.
- External Capacitor Adjustable Delay Time: The delay time before the output returns to the inactive state can be adjusted using an external capacitor.
Applications
- Microcomputer and Microprocessor Systems: Ideal for systems requiring reliable voltage monitoring and reset functions.
- Static RAM Systems with Battery Backup: Ensures proper control of static memories during power failures.
- Battery-Powered Devices: Suitable due to its low supply current and robust voltage monitoring capabilities.
- Embedded Systems: Used in various embedded systems where precise voltage supervision is critical.
Q & A
- What is the supply voltage range for the TLC7733IDR?
The supply voltage range for the TLC7733IDR is 2 V to 6 V.
- What is the purpose of the hysteresis voltage in the TLC7733IDR?
The hysteresis voltage helps prevent oscillations by providing a difference between the rising and falling threshold voltages.
- How is the delay time before the output returns to the inactive state adjusted?
The delay time can be adjusted using an external capacitor, with the delay time calculated as td = 2.1 × 10^4 × CT, where CT is in farads and td is in seconds.
- What is the typical supply current for the TLC7733IDR?
The typical supply current for the TLC7733IDR is between 9 µA and 16 µA.
- What is the operating temperature range for the TLC7733IDR?
The operating temperature range is -40°C to 125°C.
- How does the TLC7733IDR support static RAM during power failures?
The TLC7733IDR includes additional logic to control static memories with battery backup during power failures, ensuring data integrity.
- What is the high-level output current capability of the TLC7733IDR?
The high-level output current capability is -2 mA when the output voltage is greater than or equal to 2.7 V.
- Can the TLC7733IDR be used in battery-powered devices?
Yes, the TLC7733IDR is suitable for battery-powered devices due to its low supply current.
- What is the purpose of the CONTROL pin in the TLC7733IDR?
The CONTROL pin allows for the configuration of the reset output as active high when tied to GND.
- How does the TLC7733IDR ensure proper system reset?
The TLC7733IDR ensures proper system reset by generating a reset signal when the supply voltage drops below the threshold voltage and maintaining it until the voltage returns above the threshold and the delay time has expired.
