Central Semiconductor Corp
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2N2639
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2N2639 Transistor

Product Overview

The 2N2639 is a silicon NPN transistor that falls under the category of small signal transistors. It is commonly used for amplification and switching applications due to its high frequency and low power characteristics. The transistor is available in various packages such as TO-18, TO-39, and TO-5, with different quantities per package. Its essence lies in providing reliable amplification and switching capabilities in electronic circuits.

Basic Information

  • Category: Small Signal Transistor
  • Use: Amplification and Switching
  • Characteristics: High Frequency, Low Power
  • Package: TO-18, TO-39, TO-5
  • Essence: Reliable Amplification and Switching
  • Packaging/Quantity: Varies based on package type

Specifications

The 2N2639 transistor has the following specifications: - Maximum Collector-Emitter Voltage: 40V - Maximum Collector-Base Voltage: 40V - Maximum Emitter-Base Voltage: 5V - Maximum Collector Current: 0.6A - DC Current Gain (hFE): 100 - 300 - Transition Frequency: 50MHz

Detailed Pin Configuration

The 2N2639 transistor has three pins: 1. Collector (C) 2. Base (B) 3. Emitter (E)

Functional Features

  • High frequency capability
  • Low power consumption
  • Suitable for small signal amplification
  • Fast switching speed

Advantages and Disadvantages

Advantages

  • High frequency performance
  • Low power consumption
  • Versatile for small signal applications

Disadvantages

  • Limited maximum collector current
  • Moderate DC current gain range

Working Principles

The 2N2639 operates based on the principles of bipolar junction transistors, where the flow of current between the collector and emitter is controlled by the base current. It amplifies or switches electronic signals based on the input at the base terminal.

Detailed Application Field Plans

The 2N2639 transistor finds application in various electronic circuits including: - Audio amplifiers - Oscillators - Signal generators - Switching circuits

Detailed and Complete Alternative Models

Some alternative models to the 2N2639 transistor include: - 2N2222 - BC547 - 2N3904 - 2N4401

In conclusion, the 2N2639 transistor is a versatile component suitable for amplification and switching in various electronic circuits, offering high frequency performance and low power consumption.

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Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням 2N2639 у технічних рішеннях

  1. What is the 2N2639 transistor used for?

    • The 2N2639 is a high-frequency NPN transistor commonly used in RF and microwave applications.

  2. What are the key specifications of the 2N2639 transistor?

    • The 2N2639 has a maximum collector current of 50mA, a maximum power dissipation of 300mW, and a transition frequency of 800MHz.

  3. Can the 2N2639 be used as an amplifier?

    • Yes, the 2N2639 is often used as a small-signal amplifier in RF circuits due to its high-frequency capabilities.

  4. What are some typical applications of the 2N2639 transistor?

    • The 2N2639 is commonly used in RF amplifiers, oscillators, mixers, and other high-frequency circuits.

  5. What are the common operating conditions for the 2N2639?

    • The 2N2639 is typically operated at frequencies ranging from a few megahertz to several hundred megahertz, with appropriate biasing and matching networks.

  6. What are the recommended biasing configurations for the 2N2639?

    • Common biasing configurations for the 2N2639 include common-emitter and common-base configurations, depending on the specific application requirements.

  7. How does the 2N2639 compare to similar transistors in its class?

    • The 2N2639 offers competitive performance in terms of gain, frequency response, and power handling compared to other transistors in its class.

  8. Are there any known limitations or drawbacks of using the 2N2639?

    • While the 2N2639 excels in high-frequency applications, it may not be suitable for low-frequency or high-power applications due to its specific design characteristics.

  9. What are the typical packaging options available for the 2N2639?

    • The 2N2639 is commonly available in TO-39 metal can packages, which provide good thermal performance and RF shielding.

  10. Where can I find detailed application notes and reference designs for the 2N2639?

    • Detailed application notes and reference designs for the 2N2639 can be found in manufacturer datasheets, application guides, and RF design resources.