TLC7703IDR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Monitors the power supply voltage of a system - Generates a reset signal when the voltage falls below a specified threshold - Prevents erratic behavior or data corruption during power-up and power-down sequences

Package: SOIC (Small Outline Integrated Circuit)

Essence: The TLC7703IDR is a voltage supervisor IC that ensures proper functioning of electronic systems by monitoring the power supply voltage and generating a reset signal when necessary.

Packaging/Quantity: The TLC7703IDR is available in a standard SOIC package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 18V
• Reset Threshold Voltage Options: 4.55V, 4.65V, 4.75V, 4.85V, 4.95V, 5.05V, 5.15V, 5.25V
• Reset Timeout Period: 200ms (min)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TLC7703IDR has a total of 8 pins:

1. GND: Ground reference for the IC.
2. VDD: Positive power supply voltage input.
3. MR: Manual reset input pin. When pulled low, it forces the reset output to be active.
4. RESET: Active-low reset output. It goes low when the monitored voltage falls below the threshold.
5. VIT: Voltage input pin. Connects to the power supply voltage being monitored.
6. CT: Capacitor connection pin for setting the reset timeout period.
7. TH: Threshold selection pin. Connects to an external resistor divider network to set the desired threshold voltage.
8. NC: No connection pin.

Functional Features

1. Voltage Monitoring: The TLC7703IDR continuously monitors the power supply voltage and compares it to the set threshold voltage.
2. Reset Generation: When the monitored voltage falls below the threshold, the IC generates an active-low reset signal.
3. Manual Reset: The MR pin allows for a manual reset by pulling it low, overriding the monitoring function.
4. Adjustable Threshold: The TH pin enables the user to set the desired threshold voltage using an external resistor divider network.
5. Reset Timeout: The CT pin allows for setting the reset timeout period, ensuring that the reset signal remains active for a specified duration after the voltage returns above the threshold.

Advantages and Disadvantages

Advantages: - Ensures reliable system operation during power-up and power-down sequences - Adjustable threshold voltage for flexibility in different applications - Manual reset option for user control - Wide operating temperature range for various environments

Disadvantages: - Limited number of threshold voltage options - Requires external components (resistor divider and capacitor) for proper configuration

Working Principles

The TLC7703IDR operates by comparing the power supply voltage (VIT) with the threshold voltage set by the external resistor divider connected to the TH pin. If the voltage drops below the threshold, the RESET pin goes low, indicating a reset condition. The reset signal remains active for a specified duration determined by the capacitor connected to the CT pin. The MR pin allows for a manual reset by overriding the monitoring function.

Detailed Application Field Plans

The TLC7703IDR is commonly used in various electronic systems where reliable power supply monitoring is crucial. Some application fields include:

1. Microcontrollers: Ensures proper initialization and prevents data corruption during power-up and power-down sequences.
2. Industrial Control Systems: Provides reliable reset signals to prevent erratic behavior and ensure safe operation.
3. Automotive Electronics: Monitors the vehicle's power supply voltage to prevent malfunctions and protect sensitive components.
4. Telecommunications Equipment: Ensures stable operation of communication systems by monitoring the power supply voltage.

Detailed and Complete Alternative Models

1. TL7702AIDR: Similar voltage supervisor IC with a fixed threshold voltage of 4.55V.
2. MAX823LEUK+: Voltage supervisor IC with adjustable threshold voltage and a push-pull output.
3. ADM6315-26D2ARTZ-R7: Microprocessor supervisory circuit with adjustable threshold voltage and watchdog timer functionality.

These alternative models offer similar voltage monitoring and reset generation features, but may have different specifications and package options.