LM567CN/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: The LM567CN/NOPB is a tone decoder IC that is widely used in various electronic applications. It is specifically designed to detect and decode frequency-shift keying (FSK) signals.

Characteristics: - High sensitivity and accuracy in detecting FSK signals - Wide operating frequency range - Low power consumption - Easy to use and integrate into electronic circuits

Package: DIP (Dual Inline Package)

Essence: The LM567CN/NOPB is an essential component in FSK demodulation circuits, allowing for the extraction of digital data from FSK modulated signals.

Packaging/Quantity: The LM567CN/NOPB is typically available in a standard tube packaging with a quantity of 25 units per tube.

Specifications

• Operating Voltage: 4.75V to 10V
• Frequency Range: 0.01Hz to 500kHz
• Power Consumption: 8mW (typical)
• Output Current: 20mA (maximum)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The LM567CN/NOPB has a total of 8 pins, each serving a specific function:

1. GND: Ground reference for the IC.
2. VCC: Positive supply voltage input.
3. OSC1: External capacitor connection for setting the center frequency.
4. OSC2: External resistor connection for setting the center frequency.
5. OUT: Output pin for the decoded signal.
6. VREF: Reference voltage input for internal comparators.
7. THRESH: Threshold voltage input for internal comparators.
8. RESET: Reset pin for resetting the internal state of the IC.

Functional Features

• Frequency Discriminator: The LM567CN/NOPB can accurately discriminate between two different frequencies, allowing for reliable FSK signal detection.
• Wide Frequency Range: It supports a wide range of frequencies, making it suitable for various applications.
• Noise Immunity: The IC incorporates noise rejection techniques, ensuring reliable operation even in noisy environments.
• Adjustable Center Frequency: The center frequency can be easily adjusted using external components, providing flexibility in different applications.

Advantages and Disadvantages

Advantages: - High sensitivity and accuracy in detecting FSK signals - Low power consumption - Easy integration into electronic circuits - Wide operating frequency range

Disadvantages: - Limited to FSK signal detection only - Requires external components for setting the center frequency

Working Principles

The LM567CN/NOPB operates based on the principle of phase-locked loop (PLL). It compares the input signal with an internally generated reference signal and produces an output when the input frequency matches the center frequency set by external components. This allows for accurate detection and decoding of FSK signals.

Application Field Plans

The LM567CN/NOPB finds applications in various fields, including: 1. Telecommunications: Used in FSK modems for data transmission over telephone lines. 2. Remote Control Systems: Enables remote control of devices using FSK signals. 3. Security Systems: Used in alarm systems for detecting specific FSK-encoded signals. 4. Industrial Automation: Allows for communication between different industrial devices using FSK modulation.

Alternative Models

Some alternative models that provide similar functionality to the LM567CN/NOPB include: - XR-567: Manufactured by Exar Corporation. - NE567: Manufactured by Texas Instruments. - MC567: Manufactured by ON Semiconductor.

These alternative models can be considered as replacements for the LM567CN/NOPB depending on specific requirements and availability.

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