ZTX749 Discrete Semiconductor Products

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The ZTX749 is a single type bipolar junction transistor (BJT) with a maximum power dissipation of 500mW (min), a PNP type structure and a great feature-length and price ratio. This type of BJT is an excellent choice for various applications requiring a simple, reliable, and stable transistor.

Theb ZTX749 is typically used for input, output and driver stages in amplifiers and switch circuits. It is especially suitable for medium power and low frequency applications such as oscillator and chopper circuits, small power low noise amplifiers and small signal switching.

The working principle of the ZTX749 is very simple. It has three terminal connections, the emitter, collector and the base. In a PNP type structure, the current flows from collector to emitter when the base is forward biased. When the base is reverse biased, the connections are cut off and no current can flow between the collector and the emitter.

When amplified signals are applied to the base, the transistor can act as an amplifier. This is achieved by having a larger voltage change on the output signal than the input signal, thus amplifying the signal. The signal gain of the ZTX749 will vary as the load current, collector voltage, ambient temperature, and other parameters change. The gain is usually maximized when the collector current is around 1/3 of the maximum rating.

Due to its tolerance to temperature variations, the ZTX749 is able to maintain excellent temperature stability over a wide range of temperature. It also offers a high response speed for switching circuit operation and low noise when used for amplifier applications.

Overall, the ZTX749 is a high-performance, low-cost transistor with great features and balance of price and performance. It is perfect for applications requiring a reliable, simple, and stable transistor with excellent temperature stability over a wide range. It can offer an excellent signal gain with low noise and high response speed.

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