IR21EM Product Overview

Introduction

The IR21EM belongs to the category of infrared (IR) remote control receivers. This device is commonly used in consumer electronics such as televisions, DVD players, and audio systems to receive signals from remote controls and translate them into commands for the electronic device.

Basic Information Overview

• Category: Infrared Remote Control Receiver
• Use: Receiving signals from remote controls and translating them into commands for electronic devices
• Characteristics: Small form factor, sensitive to IR signals, low power consumption
• Package: Typically comes in a small, rectangular plastic housing with an IR sensor window
• Essence: Receives and decodes IR signals
• Packaging/Quantity: Usually sold individually or as part of a kit with other components

Specifications

• Operating Voltage: 3V to 5V
• Operating Temperature: -20°C to 85°C
• Frequency Range: 30 kHz to 56 kHz
• Output Signal: Digital or demodulated analog signal
• Dimensions: Typically 5mm x 5mm x 3mm

Detailed Pin Configuration

The IR21EM typically has three pins: 1. VCC (Power supply) 2. GND (Ground) 3. OUT (Output signal)

Functional Features

• IR Signal Reception: Capable of receiving IR signals within the specified frequency range
• Signal Demodulation: Converts modulated IR signals into digital or analog output
• Noise Filtering: Filters out ambient light and noise to ensure accurate signal reception
• Low Power Consumption: Operates efficiently with minimal power requirements

Advantages and Disadvantages

Advantages

• Compact size
• Wide operating voltage range
• Reliable signal reception and decoding
• Low power consumption

Disadvantages

• Limited range compared to RF remote control systems
• Susceptible to interference from direct sunlight and other IR sources

Working Principles

The IR21EM operates by receiving IR signals emitted by a remote control. The IR sensor within the device detects the incoming IR radiation and converts it into electrical signals. These signals are then processed to extract the transmitted data, which is subsequently used to control the electronic device.

Detailed Application Field Plans

The IR21EM is widely used in various consumer electronics, including: - Television sets - DVD and Blu-ray players - Audio systems - Set-top boxes - Air conditioning units - Home automation systems

Detailed and Complete Alternative Models

Some alternative models to the IR21EM include: - TSOP382: A popular IR receiver module with similar specifications - VS1838B: Another widely used IR receiver module with comparable features - TSOP4838: Known for its high sensitivity and noise immunity

In conclusion, the IR21EM is a crucial component in many consumer electronic devices, enabling seamless remote control functionality. Its compact size, low power consumption, and reliable performance make it a preferred choice for designers and manufacturers of electronic products.

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