ON Semiconductor
Obrázek může být reprezentace.
Viz Specifikace pro podrobnosti o produktu.
MMBT918
Zobrazit detail DataSheets

MMBT918 Transistor

Introduction

The MMBT918 is a bipolar junction transistor (BJT) belonging to the category of small signal transistors. It is commonly used in electronic circuits for amplification and switching applications due to its high frequency and low power characteristics.

Basic Information Overview

  • Category: Small Signal Transistor
  • Use: Amplification and Switching
  • Characteristics: High Frequency, Low Power
  • Package: SOT-23
  • Essence: NPN Silicon Epitaxial Planar Transistor
  • Packaging/Quantity: Tape & Reel, 3000 units per reel

Specifications

  • Collector-Base Voltage (VCBO): 25V
  • Collector-Emitter Voltage (VCEO): 20V
  • Emitter-Base Voltage (VEBO): 5V
  • Collector Current (IC): 100mA
  • Power Dissipation (PD): 225mW
  • Transition Frequency (fT): 250MHz
  • Operating Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The MMBT918 transistor has three pins: 1. Collector (C) 2. Base (B) 3. Emitter (E)

Functional Features

  • High Transition Frequency
  • Low Noise Figure
  • High Current Gain

Advantages

  • Suitable for High-Frequency Applications
  • Compact SOT-23 Package
  • Low Power Consumption

Disadvantages

  • Limited Collector Current
  • Restricted Voltage Ratings

Working Principles

The MMBT918 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 according to the input conditions.

Detailed Application Field Plans

  1. Amplification Circuits: Used in audio amplifiers, sensor interfaces, and signal conditioning circuits.
  2. Switching Circuits: Employed in logic gates, digital circuits, and pulse generators.
  3. Radio Frequency (RF) Applications: Utilized in RF amplifiers, oscillators, and mixers.

Detailed and Complete Alternative Models

  1. MMBT3904: NPN BJT with similar characteristics
  2. MMBT4401: PNP BJT suitable for comparable applications
  3. BC547: General-purpose NPN transistor with versatile usage

In conclusion, the MMBT918 transistor offers high-frequency performance and low power consumption, making it ideal for various amplification and switching applications in electronic circuits.

Word Count: 334

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací MMBT918 v technických řešeních

  1. What is MMBT918?

    • MMBT918 is a general-purpose NPN bipolar junction transistor (BJT) commonly used for amplification and switching applications.

  2. What are the typical applications of MMBT918?

    • MMBT918 is commonly used in audio amplifiers, signal amplification circuits, and low-power switching applications.

  3. What are the key electrical characteristics of MMBT918?

    • The MMBT918 has a maximum collector current of 800mA, a maximum collector-emitter voltage of 20V, and a maximum power dissipation of 350mW.

  4. How do I select the appropriate biasing and operating conditions for MMBT918?

    • The biasing and operating conditions for MMBT918 can be determined based on the specific application requirements, taking into account factors such as collector current, voltage ratings, and frequency of operation.

  5. Can MMBT918 be used in high-frequency applications?

    • While MMBT918 can be used in moderate frequency applications, it may not be suitable for very high-frequency applications due to its transition frequency and capacitance characteristics.

  6. What are the typical circuit configurations for using MMBT918 as an amplifier?

    • Common emitter and common collector configurations are often used for amplification with MMBT918, depending on the specific gain and impedance matching requirements.

  7. How does MMBT918 compare to other similar transistors in terms of performance?

    • MMBT918 offers comparable performance to other general-purpose NPN transistors such as 2N3904 and BC547, but specific comparisons should be made based on the application requirements.

  8. Are there any important thermal considerations when using MMBT918?

    • It's important to consider the thermal dissipation of MMBT918, especially when operating at higher currents or in ambient temperatures that could affect the transistor's performance.

  9. Can MMBT918 be used in low-power switching applications?

    • Yes, MMBT918 is suitable for low-power switching applications such as driving small relays, LEDs, or controlling other semiconductor devices.

  10. Where can I find detailed application notes and reference designs for using MMBT918 in technical solutions?

    • Detailed application notes and reference designs for MMBT918 can be found in the manufacturer's datasheet, application guides, and online technical resources.